Please get it cleared and stored into your cerebrum that a cation is formed when a neutral atom loses one or more electrons from its valence electron shell.
However too, on other hand an anion is formed when a neutral atom gains one or more electrons in its outermost electron shell.
A cation means a positive ion
An anion means a negative ion
What is electronegativity?Electronegativity is one of physical periodicity and property of elements that describes the tendency of an atom to attract electrons toward itself.
Generally, electronegativity of an atoms of elements in a particular trend is affected by both its atomic number and the distance that its valence electrons reside from the charged nuclei.
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What classifies a substance as an element?
What classifies a substance as a compound?
Actually, answer what the question is asking and give a short answer. No copying and pasting.
Elements cannot be broken down into simpler substances by any or series of chemical reactions.
A compound can be broken done by chemical reactions
Element and compoundAn element can be defined as species of atoms having a certain number of protons in their nuclei and pure substance of that species.
Elements cannot be broken down into simpler substances by any or series of chemical reactions.
A compound can be defined as a chemical substance that is composed of numerous identical molecules containing atoms from more than one element and held together by chemical bonds.
A compound can be broken done by chemical reactions
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Do the following statement describe physical or chemical property.
Uranium is a radioactive element
The fact that uranium is a radioactive element is a chemical property. Details about radioactivity can be found below.
What is radioactivity?Radioactivity is the spontaneous emission of ionizing radiation as a result of a nuclear reaction.
Radioactivity, which is the emission of particles from an unstable nucleus, is a chemical property.
Therefore, it can be said that the fact that uranium is a radioactive element is a chemical property.
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Volume is: A. Non of these. B. How much matter something contains.
What are the coefficients needed to balance this equation: NH3 +0₂ → N₂ + H₂O?
Answer:
4 NH₃ + 3 O₂ -----> 2 N₂ + 6 H₂O
Explanation:
An equation is balanced when there is an equal amount of each element on both sides of a reaction. To balance the elements, you can add coefficients to modify the amount of elements/molecules present. It is important to have the smallest coefficients possible.
The unbalanced equation:
NH₃ + O₂ -----> N₂ + H₂O
Reactants: 1 nitrogen, 3 hydrogen, 2 oxygen
Products: 2 nitrogen, 2 hydrogen, 1 oxygen
The balanced equation:
4 NH₃ + 3 O₂ -----> 2 N₂ + 6 H₂O
Reactants: 4 nitrogen, 12 hydrogen, 6 oxygen
Products: 4 nitrogen, 12 hydrogen, 6 oxygen
 what will happen to mangroves if nearby a coral reefs are destroyedSedimentation will occur in international zones instead of mangroves mangroves will improve without the filter ration that coral reefs provide mangrove receive less sunlight due to the increased true Bility in the water storm surges can just write mangroves along the coast line during storms
The thing that will happen to mangroves if nearby a coral reefs are destroyed is that:
Option C: Reefs will receive less sunlight due to increased turbidity in the water.How does the destruction of coral reefs occurs?The destruction that is known to have taken place in mangrove forests in the area of the coastal wetlands is known to be one that is highly depleting the amount of natural tannins in the water.
Due to the above, this is known to have subjected the close by coral reefs to have what we call an undue UV radiation. Its effect is that the reefs are said to be sunburned a lot and then the coral bleaching takes place.
Therefore, The thing that will happen to mangroves if nearby a coral reefs are destroyed is that Option C: Reefs will receive less sunlight due to increased turbidity in the water.
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3. What is the molar mass of Li2SO4? (2 points)
O 54.9 g/mol
103.0 g/mol
O109.9 g/mol
O 206.1 g/mol
Answer:
C.) 109.9 g/mol
Explanation:
The molar mass is the sum of each element's atomic weight times their quantity. There is one atom of each element unless denoted by subscripts.
Atomic Mass (Li): 6.9410 g/mol
Atomic Mass (S): 32.065 g/mol
Atomic Mass (O): 15.998 g/mol
Molar Mass (Li₂SO₄): 2(6.9410 g/mol) + 32.065 g/mol + 4(15.998 g/mol)
Molar Mass (Li₂SO₄): 109.939 g/mol
The solubility of the ionic compound MX3, having a molar mass of 288 g/mol, is 3.60 x 10-2 g/L. Calculate the KSP of the compound.
[tex]K_{sp}[/tex] of the compound is found to be 5.04 ×[tex]10^{-10}[/tex].
Solubility :Solubility can be define as the amount of a substance that dissolves or mixes in a given amount of solvent at specific conditions.
Solubility equilibrium
Ksp = [tex][A^{+} ]^{a}[/tex] [tex][B^{-} ]^{b}[/tex]
Ksp = solubility product constant
A+ = cation in an aquious solution
B- = anion in an aqueous solution
a, b = relative concentrations of a and b
Given,
Solubility = s = 3.60 × [tex]10^{-2}[/tex] g/L
molar mass = 288 g/ mol
∴ s= 3.60 × [tex]10^{-2}[/tex] g/L ÷ 288 g/ mol = 1.25 ×[tex]10^{-4}[/tex] mol/ L
Reaction:
MX3 ⇄ M + 3X
s 3s
[tex]K_{sp}[/tex] =[ [tex]M^{+3}[/tex]] [ [tex]X^{-1}[/tex][tex]]^{3}[/tex] = solubility product
∴ [tex]K_{sp}[/tex] =[tex][s]^{} [3s]^{3}[/tex]
∴ [tex]K_{sp}[/tex] = 3 [tex]s^{4}[/tex]
∴ [tex]K_{sp}[/tex] = 3 × (3.60 × [tex]10^{-2}[/tex] [tex])^{4}[/tex]
∴ [tex]K_{sp}[/tex] = 503.8848 ×[tex]10^{-8}[/tex] = 5.04 ×[tex]10^{-10}[/tex]
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Balanced dissociation equation for solid iron III nítrate in aqueous solution
The equation for the dissociation of iron (iii) nitrate is given below:
Fe₂(NO₃)₃ (aq) ⇄ 2 Fe⁺ (aq) + 3 NO₃⁻ (aq)What is the dissociation equation for iron (iii) nitrate?A dissociation equation is an equation in which a compound separates into the constituent ions present in the compound.
The equation for the dissociation of iron (iii) nitrate is given below:
Fe₂(NO₃)₃ (aq) ⇄ 2 Fe⁺ (aq) + 3 NO₃⁻ (aq)
In conclusion, the dissociation of iron(iii) nitrate produces iron (ii) ions and nitrate ions.
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How many moles of PC15 can be produced from 58.0 g of Cl₂ (and excess
P4)?
0.3268 moles of PC15 can be produced from 58.0 g of Cl₂ (and excess
P4).
How to calculate moles?The mole, symbol mol, exists as the SI base unit of the amount of substance. The quantity amount of substance exists as a measurement of how many elementary entities of a provided substance stand in an object or sample.
The balanced chemical equation is
[tex]P_{4} + 10Cl_{2} = 4PCl_{5}[/tex]
The mass of clorine is m([tex]Cl_{2}[/tex]) = 58.0 g
The amount of clorine is n([tex]Cl_{2}[/tex]) = m([tex]Cl_{2}[/tex])/M([tex]Cl_{2}[/tex]) = 58/70.906 = 0.817 mol
The stoichiometric reaction,shows that
10 moles of [tex]Cl_{2}[/tex] yield 4 moles of [tex]PCl_{5}[/tex];
0.817 of [tex]Cl_{2}[/tex] yield x moles of [tex]PCl_{5}[/tex]
n([tex]PCl_{5}[/tex]) = 4*0.817/10 = 0.3268 mole
0.3268 moles of PC15 can be produced from 58.0 g of Cl₂ (and excess
P4).
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A 5ml solution containing ph of 3.5 was mixed with a solution containing ph of 10.5
What will you expect the pH of the mixture be? Basic, acidic, or neutral? Also provide the pH of the combined solution.
The resulting solution will be neutral having a pH of 7.
What is the pH?The term pH is defined as the hydrogen ion concentration in solution. We know that the pH is inversely related to the hydrogen ion concentration in solution.
We know that the reaction between an acid and a base produced a salt. In this case, the salt that is produced is neutral because the acid is completely reacted with the base.
Since the solution contains a mixture of a containing pH of 3.5 and that of a pH of 10.5, the resulting solution will be neutral having a pH of 7.
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Determine the freezing point depression of a solution that contains 2 moles of NaCl in 200 g of water. ( Kf = 1.86°C/m and Kb = 0.512°C/m.)
The freezing point depression of a solution that contains 2 moles of NaCl in 200 g of water (Kf = 1.86 °C/m) is 18.6 °C.
What is the freezing point depression?It is a decrease in the freezing point of a solution, in comparison with the pure solvent.
Step 1. Determine the molality of the solution.The solution contains 2 moles of NaCl in 200 g of water.
b = moles NaCl / Kg water = 2 mol/0.200 kg = 10 m
Step 2. Calculate the freezing point depression.Given the cryoscopic constant (Kf) is 1.86 °C/m for water, the freezing point depression (ΔT) is:
ΔT = Kf × b = 1.86 °C/m × 10 m = 18.6 °C
The freezing point depression of a solution that contains 2 moles of NaCl in 200 g of water (Kf = 1.86 °C/m) is 18.6 °C.
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How would I write these in formula form?
The formula form of the chemical reactions are given as follows:
N₂ + 3 H₂ --> 2 NH₃2 AlBr₃ + 3 Cl₂ ---> 2 AlCl₃ + 3 Br₂HCl + NaOH --> NaCl + H₂OFe + PbSO₄ ---> FeSO₄ + Pb2 KClO₃ ---> 2 KCl + 3 O₂H₂SO₄ ---> SO₃ + H₂O2 Na₃PO₄ + 3 Ca(NO₃)₂ ---> 6 NaNO₃ + Ca₃(PO₄)₂(NH₄)₂CO₃ + MgSO₄ ---> (NH₄)₂SO₄ + MgCO₃2 N₂ + 5 O₂ ----> 2 N₂O₅What is a chemical equation?A chemical equation is an equation which uses the symbols of elements to show the reaction that occur between substances to form products.
The formula form of the chemical reactions are given as follows:
N₂ + 3 H₂ --> 2 NH₃2 AlBr₃ + 3 Cl₂ ---> 2 AlCl₃ + 3 Br₂HCl + NaOH --> NaCl + H₂OFe + PbSO₄ ---> FeSO₄ + Pb2 KClO₃ ---> 2 KCl + 3 O₂H₂SO₄ ---> SO₃ + H₂O2 Na₃PO₄ + 3 Ca(NO₃)₂ ---> 6 NaNO₃ + Ca₃(PO₄)₂(NH₄)₂CO₃ + MgSO₄ ---> (NH₄)₂SO₄ + MgCO₃2 N₂ + 5 O₂ ----> 2 N₂O₅In conclusion, the chemical reactions are represented by the equations.
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A piece of string is found to be 35.9 meters long. How long is the string in inches?
Answer: 1413.39 inches
Explanation:
Formula for converting meters to inches
Meters x 39.37 (roughly) = Value in inches
Applying formula
35.9 meters x 39.37 = 1413.39 inches (roughly)
The molar heat of fusion of gold is 12.550 kJ mol–1. At its melting point, how much mass of melted gold must solidify to release 235.0 kJ of energy?
The mass of melted gold to release the energy would be 3, 688. 8 Kg
How to determine the massThe formula for quantity of energy is given thus;
Q = n × HF
Where n represents number of moles
HF represents heat of fusion
To find the number of moles, we have
235.0 = n × 12.550
number of moles = [tex]\frac{235}{12. 550}[/tex] = 18. 725 moles
Note that molar mass of Gold is 197g/ mol
Let's note that;
Number of moles = mass/ molar mass
Mass = number of moles × molar mass
Mass = 18. 725 × 197
Mass = 3, 688. 8 Kg
Thus, the mass of melted gold to release the energy would be 3, 688. 8 Kg
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What kind of reactions takes place between Calcium and EDTA?
Answer:
Explanation:
:Determination of total calcium and magnesium Ion concentration
Answer:
Ca2+ ions react to form a stronger complex with the EDTA
Explanation:
As a result, when the calcium ion–PR complex is titrated with EDTA the Ca2+ ions react to form a stronger complex with the EDTA. For the titration, the indicator is added to the sample solution containing the calcium ions and forms the pink/red calcium ion-indicator complex (Ca-PR).
9.42 g of lead (ii) nitrate was reacted with 0.655 mol/L potassium iodide to produce 2.64 g of precipitate. What volume of potassium iodide was used in this reaction?
The volume of potassium iodide used will be 0.087 L or 87 mL
Stoichiometric calculationThe equation of the reaction goes thus: [tex]Pb(NO_3)_2(aq) + 2KI --- > PbI_2(s) + 2KNO_3(aq)[/tex]
The mole ratio of the 2 reactants is 1:2.
Mole of 9.42 g [tex]Pb(NO_3)_2[/tex] = 9.42/331.2 = 0.02844 mol
Equivalent mole of KI = 0.02844 x 2 = 0.05688 mol
Volume of 0.05688 mol, 0.655 mol/L KI = 0.05688/0.655 = 0.087 L or 87 mL
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When ATP breaks down to ADP, potential energy stored in bonds is released. This energy stored in bonds is
Determine the moles of solute in a 350g solution that is 2.5 molal.
Answer:
0.875 moles solute
Explanation:
You can find the moles of the solute using the molality ratio:
Molality = moles solute / mass (kg) solution
After converting the mass to kilograms, you can plug the values into the ratio and simplify to find the moles.
1,000 g = 1 kg
350 g 1 kg
-------------- x --------------- = 0.35 kg solution
1,000 g
Molality = moles solute / mass solution
2.5 m = moles solute / 0.35 kg
0.875 = moles solute
Put the following energy sublevels in order from least to greatest energy.
A. 1s, 2s, 3s, 4s, 2p, 3p, 4p, 3d, 4d, 4f
B. 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 4d, 4f
C. 1s, 2s, 2p, 3s, 3p, 3d, 4s, 4p, 4d, 4f
D. None of these
The correct order is 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 4d, 4f. The correct option is B.
Order of energy sublevelsThe correct order of energy sublevel is 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p.
Thus, with the exclusion of 5s, 5p, 6s, 5d, 6p, 7s, 5f, 6d, and 7p, what we have left in order of increasing energy is 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 4d, 4f.
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The correct order from least to greatest energy for the energy sublevels is; 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 4d, 4f (Option B).
What is the Aufbau principle?The Aufbau principle offers a method in which the energy levels in an atoms are arranged from the least to the greatest. We know that electrons are filled into orbitals in order of increasing energy.
Thus, the correct order from least to greatest energy for the energy sublevels is; 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 4d, 4f (Option B).
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Which statement can best be concluded from the ideal gas law?
O The product of pressuré and volume of an ideal gas is proportional to the absolute temperature.
O All collisions between atoms or molecules
are perfectly elastic and are not the result of any attractive forces.
O The temperature, pressure, and volume of a gas are all related.
O The behavior of a gas
under real conditions does not obey the ideal gas law.
The product of pressuré and volume of an ideal gas is proportional to the absolute temperature.
What is an ideal gas?An ideal gas is a gas that is not real in nature. It is a hypothetical gas that obeys the ideal gas law.
Just like normal gas particles, the particles of an ideal gas also move randomly. However, unlike normal gas molecules, the molecules of an ideal gas do not interact with one another.
The ideal gas law states that the product of the pressure and the volume of a gas is proportional to the temperature of the gas.
Mathematically, the ideal gas equation is expressed as:
PV = nRT where n = number of mole of the gas and R = constant.
Thus, the best conclusion from the ideal gas law is the product of pressure and volume is directly proportional to the temperature.
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4NH3+5O2=4NO+6H20 if 32.5 grams of NH3 react with enough oxygen, how many grams of water should form?
51.3 gram of water should form if 32.5 g of NH₃ react with enough oxygen.
How to find the Number of moles ?To calculate the number of moles use the formula
Number of moles = [tex]\frac{\text{Given Mass}}{\text{Molar Mass}}[/tex]
= [tex]\frac{32.5}{17}[/tex]
= 1.9 mol
4NH₃ + 5O₂ → 4NO + 6H₂O
4 mol of NH₃ react with oxygen to given 6 mole of water.
So 1.9 mol of NH₃ produces = [tex]\frac{1.9}{4}\times 6[/tex]
= 2.85 mol of water
Mass of water = Molar Mass of water × Number of moles of water
= 18 × 2.85
= 51.3 gram
Thus from the above conclusion we can say that 51.3 gram of water should form if 32.5 g of NH₃ react with enough oxygen.
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if 14.0 g of aluminium reacts with excess sulfuric acid to produce 75.26 g of aluminium sulfate, what is the percent yield?
Taking into account definition of percent yield, the percent yield for the reaction is 84.88%.
Reaction stoichiometryIn first place, the balanced reaction is:
2 Al + 3 H₂SO₄ → Al₂(SO₄)₃ + 3 H₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Al: 2 moles H₂SO₄: 3 molesAl₂(SO₄)₃. 1 moleH₂: 3 molesThe molar mass of the compounds is:
Al: 27 g/moleH₂SO₄: 98 g/moleAl₂(SO₄)₃: 342 g/moleH₂: 2 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Al: 2 moles ×27 g/mole= 54 gramsH₂SO₄: 3 moles ×98 g/mole= 294 gramsAl₂(SO₄)₃: 1 mole ×342 g/mole= 342 gramsH₂: 3 moles ×2 g/mole= 6 gramsMass of aluminium sulfate formedThe following rule of three can be applied: if by reaction stoichiometry 54 grams of aluminium form 342 grams of aluminium sulfate, 14 grams of aluminium form how much mass of aluminium sulfate?
[tex]mass of aluminium sulfate=\frac{14 grams of aluminium x342 grams of aluminium sulfate}{54 grams of aluminium}[/tex]
mass of aluminium sulfate= 88.67 grams
Then, 88.67 grams of aluminium sulfate can be produced if 14.0 g of aluminium reacts with excess sulfuric acid.
Percent yieldThe percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.
The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:
[tex]percent yield=\frac{actual yield}{theorical yield} x100[/tex]
where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.
Percent yield for the reaction in this caseIn this case, you know:
actual yield= 75.26 gramstheorical yield= 88.67 gramsReplacing in the definition of percent yields:
[tex]percent yield=\frac{75.26 grams}{88.67 grams} x100[/tex]
Solving:
percent yield= 84.88%
Finally, the percent yield for the reaction is 84.88%.
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Read the following sentence starters and descriptions. Identify each as: Claim, Evidence, or Reasoning
Reasoning includes one or more scientific principles in this context.
What is Reasoning?
This involves the thought about something in a sensible and logical manner due to one or more scientific principles being applied.
It is very important to the claim and evidence as it helps ascertain their validity in science.
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What state of matter is Polaris, the north star?
A. Plasma
B. Liquid
C. Light
D. Gas
The state of matter of Polaris, the north star is gas.
What are stars made of?Stars are made up of a mixture of hot gases.
The mixture consists of helium and hydrogen. Hydrogen burns into helium to give starts a shining appearance when observed from a far distance.
Thus, the state of matter of all stars, including the north star, is gas.
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I need help with homework
The equation that conforms with the particle model is 4C + 6O2 ----> 4CO2 + 2O2.
What is a chemical reaction?The term chemical reaction has to do with the combination of substances to give products. We know that reactants and products must follow the law of conservation of mass.
Hence, the equation that conforms with the particle model is 4C + 6O2 ----> 4CO2 + 2O2.
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An object weighs 32 newtons. What is its mass if a gravitometer indicates that g = 8.25 m/sec2?
Answer:
3.88kg
Explanation:
weight=mass_of_body(m) x acceleration_due_to_gravity(g)
The weight is given and acceleration is also give
For mass divide the weight by acceleration.
Activity
In this activity, you will examine the difference between opinions, facts, theories, and laws. To do so, examine the table
below. Carefully read each example in the table before answering the questions thatfollow.
Opinions are differ from facts as that we cannot change the facts but opinions can be changed as in first example it is given anthracite is better than bituminous coal may be there is another coal which is more better than anthracite. So here opinion is changed.
What is Coal ?It is a black or brownish black sedimentary rock. It contains Sulphur, hydrogen, oxygen, carbon etc. It is always preferred as fuel. Coal was formed millions years ago when plant decay in the soil. It is obtained from dead vegetation. It is obtained from dead plants matter decay into peat and then it is converted into the coal by the process of heat.
What is Solar System ?Solar System is made up of all the planets that revolve around our Sun. Solar System contains eight planets. These planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
Thus from the above conclusion we can say that Opinions are differ from facts as that we cannot change the facts but opinions can be changed as in first example it is given anthracite is better than bituminous coal may be there is another coal which is more better than anthracite. So here opinion is changed.
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How much heat is required to raise the temperature of 67.0 g of water from its melting point to its boiling point?
When 67 g of water is heated from its melting point to its boiling point, it takes 28006 J of heat.
Relationship between heat production and temperature changeA way to numerically relate the quantity of thermal energy acquired (or lost) by a sample of any substance to that sample's mass and the temperature change that results from that is provided by specific heat capacity.The following formula is frequently used to describe the connection between these four values.
q = msΔT
where, q = the amount of heat emitted or absorbed by the thing
m = the object's mass = 67 gm
s = a specific heat capacity of the substance = 4.18 J/gC
ΔT = the resultant change in the object's temperature = 373.15 -273.15K= 100 k
q = 67 * 4.18 * 100 J
⇒q = 28006 J
Therefore it is concluded that 67 g of water takes 28006 J of heat from its melting point to reach its boiling point.
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All elements have a AHf, of ___
kJ/mole at standard temperature and pressure.
a. 1
b. 4.184
c. 273
d. 0
All elements have a AHf, of 0
kJ/mole at standard temperature and pressure.
What is an element?An element can be defined as a substance which cannot be split into two or more simpler forms by an ordinary chemical process
Below are the list of the first twenty elements:
HydrogenHeliumLithiumBeryliumBoronCarbonNitrogenOxygenFluorineNeonSodiumMagnesiumAluminumSiliconPhosphorusSulphurChlorineArgonPotassiumCalciumSo therefore, all elements have a AHf, of 0
kJ/mole at standard temperature and pressure.
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The concentration of an HCl acid solution is initially 6mol/L. What would the concentration of a new solution be if 200 mL of the original HCl solution is diluted with 1L of water.
Taking into account the definition of dilution, the concentration of the new solution is 1 mol/L.
DilutionWhen it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.
Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.
In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.
A dilution is mathematically expressed as:
Ci×Vi = Cf×Vf
where
Ci: initial concentrationVi: initial volumeCf: final concentrationVf: final volumeFinal volumeIn this case, you know:
Ci= 6 mol/LVi= 200 mLCf= ?Vf= 1 L (1000 mL) water + 200 mL of HCL= 1200 mLReplacing in the definition of dilution:
6 mol/L× 200 mL= Cf× 1200 mL
Solving:
(6 mol/L× 200 mL)÷ 1200 mL= Cf
1 mol/L= Cf
In summary, the concentration of the new solution is 1 mol/L.
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