The valence electrons of an atom can be represented using Lewis dot structures, which are also used to depict the bonding and non-bonding electrons in molecules.
The valence electrons of an atom are shown by Lewis dot structures, sometimes called electron dot structures. To represent the element's valence electrons in these structures, dots are placed all around the element's symbol. The number of valence electrons that each element has depends on where it is on the periodic table. Dots are used to symbolize valence electrons in order to highlight the electrons that are available for formation of bonds. To display the bonding and non-bonding electrons in a molecule, Lewis dot structures are utilized. This can be useful in figuring out a compound's reactivity and chemical characteristics. The Lewis dot structure can be used to depict the electron transfer for ionic compounds, which are created when electrons are transferred from one atom to another. Atoms with a complete complement of electrons (ions with a positive charge) and atoms that have either gained or lost electrons are visible in the Lewis dot structure of an ionic compound (ions with a negative charge). The Lewis dot structure can be used to illustrate the sharing of electrons in covalent compounds, which are created when atoms share electrons. A covalent compound's Lewis dot structure reveals how its atoms share electrons via a covalent connection. The nature of chemical bonding, the stability and reactivity of compounds, and the prediction of bond angles, geometry, and polarity of molecules can all be better understood by knowing Lewis dot structures.
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Water is able to dissolve many compounds as a result of which of the following?
Please choose the correct answer from the following choices, and then select the submit answer button.
O the fact that water molecules are polar and that the hydrogen atoms in water molecules have a slight negative charge
O the fact that water molecules are non-polar
O the fact that the hydrogen atoms in water molecules have a slight negative charge
O the fact that most non-water molecules are hydrophobic
O the fact that water molecules are polar
Water is able to dissolve many compounds as a result of the fact that water molecules are polar and that the hydrogen atoms in water molecules have a slight negative charge.
When a liquid spreads over the surface flippantly with out the formation of droplets, a floor is wetted. If that liquid is water, the surface is hydrophilic. Water molecules have a polar association of oxygen and hydrogen atoms—one side (hydrogen) has a wonderful electric charge and the alternative side (oxygen) had a terrible rate. This lets in the water molecule to turn out to be drawn to many different unique varieties of molecules. Generally speaking, water is right at dissolving ions and polar molecules, however terrible at dissolving nonpolar molecules.
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HELPP!! INOIC BONDS
How will Sr and O come together in an ionic bond? Complete the sentence: For
every 1 atom of Sr, there will be
atom(s) of 0.
Choose
The ionic substance strontium oxide, SrO, forms from the reaction of strontium metal with molecular oxygen.
What is ionic compounds?Positively charged ions, known as cations, and negatively charged ions, known as anions, make up ionic compounds, which are neutral substances. The name of the cation is written first, followed by the name of the anion, for binary ionic compounds (ionic compounds that only contain two types of elements).A chemical compound known as an ionic compound in chemistry is one that contains ions bound together by the electrostatic forces known as ionic bonding. Despite having both positively and negatively charged ions, or cations and anions, the molecule is generally neutral.Ionic bonding will often be present in compounds when a metal is bound to either a non-metal or a semi-metal.Learn more about Ionic compound refer to ;
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How many moles of solute are in 250ml of 2.0m cacl2?
Answer:
0.2 moles
Explanation:
To find the number of moles of solute in a solution, you can use the formula: moles of solute = concentration (in molarity) x liters of solution. In this case, the concentration of the calcium chloride (CaCl2) solution is 2.0 M, and the volume of the solution is 250 ml. To convert the volume from milliliters to liters, you need to divide by 1000, so the solution's volume is 0.25 L.
Now we can substitute the values into the formula:
moles of solute = 2.0 M x 0.25 L = 0.5 moles.
but we need to remember that calcium chloride is a salt composed of two ions (Ca2+, Cl-), so the number of moles of CaCl2 is half the number of moles of calcium ions and chloride ions. Therefore, the number of moles of solute in 250ml of 2.0m CaCl2 is 0.5/2 = 0.2 moles.
In aqueous solutions, which type of bond or force has similar bond strength as ionic bond interactions? A. Nonpolar covalent bond B. Hydrogen bonds C. Polar covalent bond
In aqueous solutions, hydrogen bonds have similar bond strength as ionic bond interactions. Thus option B is the answer.
In aqueous solutions, ionic interactions occur between positively and negatively charged ions, which are held together by electrostatic forces. These forces are relatively strong and are responsible for the high melting and boiling points of ionic compounds. Hydrogen bonds, on the other hand, are a type of dipole-dipole interaction between the partially positive hydrogen atom of one molecule and the partially negative atom of another.
The strength of hydrogen bonds is about 5-10% of the strength of covalent bonds, which is similar to the strength of ionic bonds in aqueous solutions. This makes hydrogen bonds the type of bond or force that has similar bond strength as ionic bond interactions in aqueous solutions. These type of bonds are found in many biomolecules like DNA and RNA, proteins and many other natural and synthetic compounds.
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How does the melting points of an impure sample of a substance compare to the melting point of a pure sample of the same substance?
a) The two melting points are the same but the impure sample has a broader range.
b) The two melting points are the same but the impure sample has a sharper range.
c) The impure sample has a higher melting point.
d) The impure sample has a lower melting point with a broader range.
e) The impure sample has a lower melting point with a sharper range.
The melting points of an impure sample is a) The two melting points are the same but the impure sample has a broader range.
Impure materials generally tend to have a barely decrease melting factor than the natural substance, and a broader melting temperature range. Pure materials may be diagnosed through evaluating the melting factor located withinside the test with posted reference records of what the melting factor need to be. Impurities, even if found in small amounts, commonly decrease the melting factor and expand the melting factor range. A huge melting factor range (extra than 5°C) commonly shows that the substance is impure; a slim melting factor range (O. 5-2°C) commonly shows that the substance within reason natural.
Thus, option a is the correct choice.
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Solve the problem using the equation:
2AI + 3S --> Al2S3
▸
How many moles of Al2S3 can be
produced from 12 moles of Al?
Answer:
The answer is 6 moles.
Explanation:
To calculate the amount of Al2S3 that can be produced from 12 moles of Al, we need to determine the amount of S that is required:
12 moles Al / 2 moles Al per mole Al2S3 = 6 moles Al2S3
3 moles S per mole Al2S3 * 6 moles Al2S3 = 18 moles S
Since 12 moles of Al are available, the maximum amount of Al2S3 that can be produced is 6 moles.
At which boundary may a mountain chain of sedimentary rock form?
convergent boundary of two continental crusts
convergent boundary of two continental crusts
convergent boundary of oceanic crust and continental crust
convergent boundary of oceanic crust and continental crust
divergent boundary between two oceanic crusts
divergent boundary between two oceanic crusts
divergent boundary of oceanic crust and continental crust
The boundary at which a mountain chain of sedimentary rock may form is the convergent boundary of two continental crusts.
The correct option is A.
What is a convergent boundary?A location on Earth where two or more lithospheric plates clash is known as a convergent boundary.
Subduction is the inevitable sliding of one plate beneath the other. The Wadati-Benioff zone, a plane with a high frequency of earthquakes, can be used to designate the subduction zone.
Sedimentary rocks may be formed at the convergent boundary of two tectonic plates.
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Answer:The answer to the question above is the second choice, "convergent boundary of two continental crusts". This type of convergence creates some of the world's largest mountain ranges. Magma cannot penetrate the thick crust. Therefore, there are no volcanoes.
Explanation:
kinda late though haha
How many moles are in 5.02 X 1023 atoms of chlorine gas
It takes 5.02 1023 units of a chemical to make up one mole (such as atoms, molecules, or ions).
Chlorine gas has how many moles?The periodic table's atomic weight in g/mol for chlorine, which is 35.45 g/mol, can be used to calculate the mass of one mole of chlorine gas. This value is known as the molar mass.It takes 6.022 1023 units of a chemical to make up one mole (such as atoms, molecules, or ions). Avogadro's number or Avogadro's constant are both designations for the number 6.022 1023.By canceling these atoms, we can calculate the amount of gold that is equivalent to 0.87 moles. Hope you can understand the solution; this is the answer.To learn more about mole refer to:
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40 cm3 of acid were mixed with 60 cm3 of alkali in an insulated container. The average temperature of the two solutions before they were mixed was 19.5°C. The temperature after mixing was 27.5°C. Was this an exothermic or an endothermic reaction?
This was an exothermic reaction, as the temperature increased from 19.5°C to 27.5°C after mixing.
Exothermic reactionAn exothermic reaction is a chemical reaction that releases energy in the form of heat. This energy is released because the reactants have a higher energy content than the products.
As the reaction proceeds, the energy difference between the reactants and products is released as heat.
Examples of exothermic reactions include combustion, burning, oxidation, and some types of chemical reactions.
These reactions can be spontaneous, meaning they occur without any outside energy input.
Exothermic reactions are important in many fields, such as energy production and manufacturing, since they can provide a useful source of energy.
This indicates that energy was released as the two solutions mixed, resulting in an increase in temperature.
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of the following types of bonds or interactions between atoms in aqueous solutions, which is the weakest?
Van der Waals forces are the weakest bonds or interaction among all the aqueous solution.
Van der Waals forces, which depend on the separation between atoms or molecules, are weak intermolecular forces. These interactions between uncharged atoms and molecules give rise to these forces.
Three types of van der Waals forces may be distinguished: electrostatic, inductive, and dispersion. In each class, the dipole-dipole, dipole-induced dipole, and London dispersion contributions are often the only interactions that are included in textbooks since they are always substantial when they occur. Various elements have different melting and boiling temperatures due to van der Waals force. The more energy (heat) required to dissolve an atom's bonds, the stronger the force holding them together.
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A sample of neon occupies 3.25 L at 35ºC and 1829 mm Hg. What will the temperature of the gas be, in degrees Celsius, at a volume of 4250 mL and a pressure of 1.25 atm?
The temperature (in degrees Celsius) of the gas at a volume of 4250 mL and a pressure of 1.25 atm is -63.8 °C
How do I determine the temperature?The temperature of the gas at a volume of 4250 mL and a pressure of 1.25 atm can be obtained by using the combined gas equation as illustrated below:
Initial volume (V₁) = 3.25 LInitial pressure (P₁) = 1829 mmHgInitial temperature (T₁) = 35 °C = 35 + 273 = 308 KNew volume (V₂) = 4250 mL = 4250 / 1000 = 4.25 LNew pressure (P₂) = 1.25 atm = 1.25 × 760 = 950 mmHgNew temperature (T₂) =?P₁V₁ / T₁ = P₂V₂ / T₂
(1829 × 3.25) / 308 = (950 × 4.25) / T₂
Cross multiply
1829 × 3.25 × T₂ = 308 × 950 × 4.25
Divide both side by (1829 × 3.25)
T₂ = (308 × 950 × 4.25) / (1829 × 3.25)
T₂ = 209.2 K
Subtract 273 to obtain answer in °C
T₂ = 209.2 - 273 K
T₂ = -63.8 °C
Thus, we can conclude that the temperature is -63.8 °C
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Classify each organic compound based on the functional group it contains
Organic compound which has -OH as functional group is classified as alcohols while those with -COOH as functional group are classified as carboxylic acids.
What is functional group?Functional group is defined as a substituent or group of atoms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.
The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.
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What happens to electrons during reduction?
During a reduction reaction, electrons are gained by the molecule or ion that is being reduced.
This is the opposite of an oxidation reaction, where electrons are lost. The electrons that are gained by the molecule or ion that is being reduced typically come from another molecule or ion, which is then oxidized.
Reduction is a chemical reaction in which electrons are transferred from one molecule or ion to another. This process is the opposite of the oxidation reaction, which involves the loss of electrons. In a reduction reaction, the molecule or ion that gains electrons is said to be reduced, while the molecule or ion that loses electrons is said to be oxidized.
Reduction reactions are important in many areas of chemistry, including organic chemistry and biochemistry.
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How much is 1 mole of CH4?
1 mole of CH4 is Avogadro's number of molecules. So 1 mole of CH4 is about 16.04 grams.
About MoleMole is the base unit for the quantity amount of substance in the International System of Units. After being redefined in 2019, the definition of the unit mole, as stated in the ninth edition of the SI Brochure, is as follows.
The mole, which is symbolized by the mole, is the SI unit amount of substance . One mole contains exactly 6.02214076×1023 elementary entities. This number, called Avogadro's number, is the fixed numerical value of Avogadro's constant NA when expressed in units of mol−1.
The amount of substance, which is symbolized by n, in a system is a measure of the number of certain elementary entities. Elementary entities can be in the form of atoms, molecules, ions, electrons, other particles, or a certain group of particles.
Previously, this unit was defined as the amount of chemical substance containing a representative number of particles (now called elementary entities), for example atoms, molecules, ions, electrons, or photons, which is equivalent to the number of atoms in 12 gram of carbon-12 (12C), isotopes carbon with a definitive standard atomic weight of 12. This number was also previously expressed as Avogadro's number. Before being precisely defined in the redefinition, the Avogrado number was considered to be "approximately" to 6.022140857×1023 mol−1.
The mole is widely used in chemistry as a convenient way of expressing the amounts of reactants and products in a chemical reaction. For example, the equation 2 H2 + O2 → 2 H2O means that 2 mol dihydrogen (H2) and 1 mol dioxygen (O2) react to form 2 mol of water (H2O). The mole is also used to express the number of atoms, ions or other elementary entities in a sample of a given substance. The concentration of a solution is generally expressed as molarity, which is defined as the number of moles of solute per liter of solution.
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7. Identify the precipitate in the following reaction:
MgCl₂ (aq) + 2NaOH (aq) → 2NaCl (aq) + Mg(OH)2 (s)
The precipitate in the reaction between MgCl2 (aq) and 2NaOH (aq) is Mg(OH)2 (s).
Identify the precipitate in the following reaction?The precipitate in the reaction between MgCl2 (aq) and 2NaOH (aq) is Mg(OH)2 (s).When MgCl2 (aq) and 2NaOH (aq) are mixed together, a double displacement reaction occurs, which causes the ions to switch partners.The products of this reaction are 2NaCl (aq) and Mg(OH)2 (s).MgCl2 (aq) is a soluble salt, so it is in the aqueous state, while 2NaOH (aq) is also a soluble salt, so it is also in the aqueous state.When these two compounds are mixed, the Mg2+ ion in MgCl2 (aq) switches with the 2Na+ ion in 2NaOH (aq), resulting in 2NaCl (aq) and Mg(OH)2 (s).Mg(OH)2 (s) is an insoluble salt, which causes it to form a precipitate.The precipitate Mg(OH)2 (s) appears as a white solid that is insoluble in water and settles to the bottom of the container.The reaction can be described as follows: 2MgCl2 (aq) + 2NaOH (aq) → 2NaCl (aq) + Mg(OH)2 (s).To learn more about The precipitate reaction refer to:
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What number of sulfur moles are in one mole of dinitrogen tetrasulfide
There are 4 sulphur in one mole of dinitrogen tetrasulfide. The molar mass of the compound is 156 g /mol. The mass contribution by sulfur is 128 g corresponds to 4 moles of sulphur.
What is dinitrogen tetrasulfide ?Dinitrogen tetrasulfide is a covalent compound formed through the sharing of electrons between nitrogen and sulphur atoms. Sulphur shares its two valence electrons and nitrogen shares its two valence electrons with sulphur and one with the second nitrogen.
The atomic mass of sulphur = 32 g/mol
atomic mass of nitrogen = 14 g/mol
molar mass of dinitrogen tetrasulfide = (14× 2) + (32 × 4 ) = 156 g/mol
There no.of moles of sulphur = 128 /32 = 4 moles.
Therefore, there are 4 moles of sulphur in the compound.
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what was the original mass of a radioactive sample that decayed to 25 grams in four half life periods
The original mass of the radioactive sample was 1.5625 grams. A half-life period is the amount of time it takes for half of a radioactive sample to decay
In order to determine the original mass of a radioactive sample that has decayed to 25 grams in four half-lives, we need to use the formula:
Original mass = final mass multiplied by (half-life period / number of half-lives)2.
Since we know that the final mass is 25 grams, the number of half-life periods is 4, and we can assume that the half-life period is constant.
So, original mass = 25 × (1/4)² = 25 × 1/16 = 25/16 = 1.5625 grams.
Therefore, the original mass of the radioactive sample was 1.5625 grams.
The number of half-life periods that have passed is a measure of how much the sample has decayed. Each time a half-life period passes, the remaining radioactive sample is cut in half.
In this case, we know that the original sample has gone through four half-lives and has decayed to 25 grams. This means that at the end of the first half-life period, the sample would have been halved to half its original mass. At the end of the second half-life period, it would have been halved again, and so on. After four half-lives, the remaining sample would be only 25 grams, or 1/16th of the original mass.
Original mass = final mass * (half-life period / number of half-life periods) 2 can be used to calculate the sample's original mass by taking the final mass and multiplying it by the reciprocal of the number of half-life periods squared. This is because each half-life period reduces the mass of the sample by a factor of 1/2, and by the fourth half-life period, the remaining sample will have been reduced by a factor of 1/2 × 1/2 × 1/2 × 1/2 = 1/16.
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a classification for matter that always has the same composition
Answer:
Explanation:
Matter that always has exactly the same composition is classified as a pure substance. Every sample of a given substance has the same properties because a substance has a fixed, uniform composition.
which line must the temperature and pressure have crossed if a liquid sample of x is observed to boil?
Along the AB line. The solid line between points B and C is the same as the temperature dependence graph of liquid vapor pressure. It contains all combinations of temperatures and pressures at which liquids boil. At any point along this line, liquid boils to form gas and gas condenses to form liquid at the same rate.
Boiling Water ProcessIn the general process of boiling water, we need energy from heat. This energy then makes the bonds of the water molecules begin to break free and the molecules spread out.
the process of boiling water doesn't happen instantly. Before the water reaches the boiling point at 100℃ and bubbles so actively, air bubbles start to appear before the boiling point is reached.
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How many moles of potassium oxide (k20) will be formed when 1.52 moles of potassium reacts with oxygen according to the following reaction: 4k + o2 yield 2 k20
According to the stoichiometry of the given chemical reaction, 1.835 moles of potassium oxide will be formed when 1.52 moles of potassium reacts with oxygen .
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
In the given reaction 156 moles of potassium gives 188.4 moles of potassium oxide, thus, 1.52 moles will give 1.52×188.4/156=1.835 moles.
Thus, 1.835 moles of potassium oxide will be formed when 1.52 moles of potassium reacts with oxygen .
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Which term describes the phase change that occurs when intermolecular forces (attractions) completely overcome kinetic energy (motion) and the material has little to no motion?
Explanation:
If the kinetic energy is less than the attractive forces, a liquid or solid will form.
The average kinetic energy of the particles in a solid is very less almost negligible this is because they have high attractive forces between their molecules as they are tightly packed in regular lattices and are vibrating about their mean positions.
Therefore, freezing of a liquid or the sublimation of a gas results in the formation of a solid. These two phase changes result in the overcoming of K.E completely.
Answer:
freezing
Explanation:
What is the balanced equation for h2o2 → h2o o2?
The balanced chemical equation for the decomposition of hydrogen peroxide (H2O2) into water (H2O) and oxygen (O2) is: for H2O2 → H2O O2 is 2H2O2 → 2H2O + O2
This equation shows that two molecules of hydrogen peroxide (H2O2)decompose into two molecules of water and one molecule of oxygen. The coefficients in front of each molecule indicate the stoichiometry, or the ratio of the number of moles of each substance involved in the reaction. This equation is balanced because the number of atoms of each element on both sides of the equation is the same, and there are 2 hydrogen atoms, 4 oxygen atoms on both sides. It's important to note that the decomposition of hydrogen peroxide is an exothermic reaction, meaning it releases heat energy, and it is catalyzed by enzymes such as catalase.
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Atoms of an element containing different numbers of neutrons but the same number of protons are called .
Atoms that contain the same number of protons but different numbers of neutrons are called isotopes of the element. We total the number of protons and neutrons to name the isotope.
Answer: Your answer would be, Isotopes!
Explanation: Isotopes, also known as isotopic nuclides, are two atoms with the same atomic number but different masses (the same number of protons but different numbers of neutrons).
what are two other names for the light independent reactions?
Answer: The Calvin cycle and the Calvin-benson cycle
Explanation:
NaCl molar mass? show solution pls
58.44 g/mol. One mole of sodium chloride weighs 58.44 g. (6.02 x 1023 formulas). To put it another way, it provides the grams of a substance per mole.
A molar mass A chemical compound's mass M is equal to the molecular weight (M) of the substance. MB = m/nB, where m is the total mass of a sample of a pure substance and nB is the amount of substance B expressed in moles, is the formula for this equation. Pure substance falls under the definition. You can find out how much a compound weighs in moles by looking at its molar mass. To put it another way, it provides the grams of a substance per mole.
Calculation:58.44 g/mol
The mass of a mole of sodium chloride is 6.02 x 1023 formulae.
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What volume of Argon gas (at STP) is equal to 2 grams of Argon?
10/2
At STP, a volume of 1.12 liters is equivalent to 2 grams of argon gas.
What is STP?The standard temperature and pressure is called STP. The conditions are 0 °C (273.15 Kelvin) and 1 atmosphere (101.325 kilopascals), respectively. STP is often used as a benchmark for gas characteristics calculation and heterogeneity.
For above given example,
The molar mass of argon is 39.95 g/mol. Using the ideal gas law equation PV = nRT and at STP conditions (standard temperature and pressure, which are 0 °C or 273.15 K and 1 atm or 101.325 kPa, respectively), we can determine how many moles of argon are in 2 grams.
n = m/M = 2 g / 39.95 g/mol = 0.050 mol
Therefore the volume of argon can be determined using the molar volume of an ideal gas at STP, which is approximately 22.4 L/mol:
V = n x 22.4 L/mol = 0.050 mol x 22.4 L/mol = 1.12 L
Therefore, 2 grams of argon gas at STP is equal to a volume of approximately 1.12 liters.
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Make sure the rearrangement has the target variable______
Yes, the target variable is a requirement for the rearrangement to be valid. The target variable, which we are attempting to predict or analyze, must be taken into account for the rearrangement to be effective.
Rearrangement is what?
Rearranging or reorganizing a group or structure's collection of elements is known as rearrangement. To make a new arrangement, it may be necessary to move some elements around, rearrange them, or change the emphasis of an element. Rearranging things can give something a fresh appearance or make a system more effective. Rearranging the furniture in a room, for instance, can give it a fresh feel.To learn more about rearrangement here
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why does the potential energy increase when the magnets are against each other but are from the opposite direction of the magnetic force??
The potential energy is increased because their ability to do work on each other is not increased. Potential energy is decreased because moving magnets apart always decreases potential energy.
What is meant by potential energy?
Potential energy is a form of stored energy that is dependent on the relationship between different system components.When a spring is compressed or stretched, its potential energy increases.If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy.The position, organization, or state of the object or substance determines the amount of stored energy. It can be pictured as energy with the "potential" to perform labor.Any object that is raised from rest has energy that can be released at a later time; for this reason, it is referred to as potential energy.To learn more about potential energy refer to
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marques is working hard in his organic chemistry course so that he can prepare for the mcat. identify the learning science strategies that would most effectively enable marques to learn and master the concepts of organic chemistry.
Some effective learning strategies for mastering the concepts of organic chemistry that marques easily can learn include active learning, spaced repetition and self-explanation, etc.
1. Active learning: This involves actively engaging with the material, such as through problem-solving, experimentation, and discussion on organic chemistry.
2. Spaced repetition: This involves reviewing material at increasing intervals to help retain information over time.
3. Elaborative rehearsal: This involves connecting new information to existing knowledge, such as by explaining concepts in one's own words or relating them to real-world examples.
4. Self-explanation: This involves explaining how new information relates to what one already knows and why it is important.
5. Interleaving: This involves practicing different skills or concepts within a single study session, rather than focusing on one at a time.
6. Practice Testing: This involves taking practice tests to help solidify your understanding of the material.
7. Mnemonics: This involves using memory aids such as acrostic, acronym, or mental imagery to memorize complex information.
8. Distributed practice: This involves spreading out study sessions over time, rather than cramming, to improve retention and recall.
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Balance the following reactions using coefficients
If the coefficient is a 1, then you must put the 1 into the blank
C₂H5OH()+
O₂(g) ->
CO₂(g) +
CaC₂(s) +
Sr(s) +
Asl3(s)->
CuSO4(aq) +
H₂O(0) ->
HNO3(aq)->
As(s) +
KI(S) ->
Ca(OH)₂(s) +
Sr(NO3)2(aq) +
12(s)
Cul(s) +
H₂O(0)
C₂H₂(g)
H₂(g)
1₂(s) +
K₂SO4(aq)
1st and 2nd reactions are balanced reactions and the rest are not.
What is balanced reaction ?A balanced chemical equation is a chemical equation in which the number of atoms for each element in the reactants side is equal to the number of atoms for that same element in the products side. This means that the equation follows the law of conservation of mass, which states that the total mass of the reactants must be equal to the total mass of the products. Balancing a chemical equation involves adding coefficients (numbers in front of a chemical formula) to the reactants and/or products to make sure that the number of atoms for each element is the same on both sides.
Reaction 1: C₂H₅OH(l) + 3O₂(g) -> 2CO₂(g) + 3H₂O(g)
Reaction 2: 2Cu(s) + Asl3(s) -> 3As(s) + 3Cu(s)
Reaction 3: 2Cu(s) + O₂(g) + H₂O(l) -> CuSO₄(aq) + 2H₂(g)
Reaction 4: HNO₃(aq) -> NO(g) + 1/2O₂(g) + H₂O(g)
Reaction 5: 2KI(s) + As(s) -> K₂AsI₃(s)
Reaction 6: Ca(OH)₂(s) + Sr(NO₃)₂(aq) -> Ca(NO₃)₂(aq) + Sr(OH)₂(s)
It is important to note that the 3rd, 4th, 5th and 6th reactions are not balanced, that means that the number of atoms of each element on reactants side is not equal to the number of atoms of each element on products side.
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