Answer:
0.5 7.0 there is so many results
Explanation:
its very simple
3. Which electromagnetic wave types have frequencies higher than microwaves but lower than
UV radiation?
X-rays and gamma rays have frequencies higher than microwaves but lower than UV radiation.
X-rays and gamma rays are both types of electromagnetic radiation. They are similar in that they are both invisible, travel at the speed of light, and can penetrate human tissue. They differ in their wavelength and energy. X-rays have a shorter wavelength and higher energy than gamma rays
Gamma rays are a type of electromagnetic radiation. They are the most energetic form of electromagnetic radiation. Gamma rays are produced by the most energetic events in the universe, such as supernova explosions and the merging of neutron stars.
X-rays are used in medicine and dentistry because they can penetrate the human body, which Gamma rays cannot.
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A local AM radio station broadcasts at a frequency of 587 kHz. ()
Calculate the energy of the frequency at which it is broadcasting.
Energy =
kJ/photon
Explanation:
E=hv
6.626*10power of -34 * 587khz
What three things does the atomic number of an element tell us?
Answer:
the number of protons in the nucleus of an atom. the number of protons define the identity of an element
Question is in picture below!
The order of boiling point from the highest to the lowest from the given compounds above are as follows:
CH3CH2CH2CH2CH2OH - CH3CH2CH2CH2CH2Br - CH3CH2CH2CH2CH3 - CH3CH2CH3.
The correct order is option b, d, c and a.
What is meant by boiling point of substances?The boiling point of substances can simply be defined as that temperature at which liquids boils and then change to vapor or steam.
However, from the above given task, the organic compound, CH3CH2CH2CH2CH2OH has the same boiling simply because of its power to participate in hydrogen bond formation. This compound CH3CH2CH2CH2CH2OH is known as 1-pentanol.
So therefore, we can confirm that the compound from above the correct order of boiling point from the highest to the lowest is 1-pentanol, 1-bromopentane, pentane and propane respectively.
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A bath bomb is a solid sphere made of a weak base and a weak acid. When you add it to a bathtub, it mixes with the water to create a soapy solution. If you want it to completely and quickly dissolve a large bath bomb, what might you do?
A. Decrease the water volume, which increases the solubility of the bath bomb - dissolving it more quickly.
B. Decrease the water temperature, which increases the solubility of the bath bomb - dissolving it more quickly.
C. Increase the water temperature, which increases the solubility of the bath bomb - dissolving it more quickly.
D. Increase the water acidity to a pH of 2, which increases neutralization of the bath bomb - and then take a shower, instead
In a case whereby A bath bomb is a solid sphere made of a weak base and a weak acid and you add it to a bathtub, it mixes with the water to create a soapy solution. If you want it to completely and quickly dissolve a large bath bomb, then C. Increase the water temperature, which increases the solubility of the bath bomb - dissolving it more quickly.
What is Solubility?Solubility can be described as the maximum amount of a substance which candissolve when subjected to given amount of solvent at a specified temperature.
It should be noted that the Solubility i serves as the characteristic property that can be associated to a specific solute–solvent combination and there is a differing solubilities, hence from the case aboive when the tempertaure is been increased , this will increases the solubility of the bath bomb .
Therefore, option C is correct.
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What is the electron configuration for an electrically neutral atom of oxygen?
Use the periodic table.
Responses
1s22s2
1 s 2 2 s 2
1s22s22p4
1 s squared 2 s squared 2 p to the power of 4
1s22s22p44d2
1 s squared 2 s squared 2 p to the power of 4 4 d squared
1s22s22p6
Answer:
1s2 2s2 2p4
Explanation:
is A2+C3H6->C3H6A2 an addition reaction?
Yes. The reaction is an addition reaction.
What are addition reactions?Addition reactions are reactions where 2 or more reactants combine to form a single product. Addition reactions are otherwise known as synthesis reactions because they often result in the synthesis of new molecules entirely.
Generally, addition reactions can be represented by the following equation:
A + B ---> AB
They are quite different from decomposition reactions in which a single product decomposes to form 2 or more products or substitution reactions in which an atom displaces another atom in a compound.
Thus, the reaction [tex]A_2 + C_3H_6 --- > C_3H_6A_2[/tex] is an addition reaction.
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Question 2
Based on the balanced chemical equation: 2 NH3 + 3 CuO → 3 Cu + N₂ + H₂O which of
the following statements is NOT true:
OH2O is a reactant
O Cu is a product
O CuO is a reactant
1.5 pts
NH3 is a reactant
2 NH3 + 3 CuO → 3 Cu + N₂ + H₂O in the equation the compounds that are on the left side were reactants and the compounds on the right side was products.
what is reactants and products?
Chemical reactions form and dissolve the chemical bonds that hold atoms together to form molecules. During a chemical reaction, the atoms are re organized; they become disengaged and reattached to one another in various ways, resulting in new compounds with diverse characteristics. Every chemical reaction has two parts:
Reactants – The beginning elements of a chemical reaction; what enters into the reaction
Usually written on the left side of a chemical reaction
Products — What is produced as a result of a chemical reaction.
Usually written on the right side of a chemical reaction.
among the given options the false statement was
H20 is a reactant was the false statement.
but the H2O was actually a product.
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What is the physical state of fluorine at 25 degrees?
Answer:
State : Gaseous state Colour : Pale yellow Odour : Irritating
Explanation:
At 25 degree celsius which is approximately known as the room temperature, Fluorine being the highest electronegative element has weak van der waal forces due to which the electrons are apart from each other. At a high enough temperature(room temp. in this case) that is higher than their boiling point, the fluorine atoms become gaseous particles. Hope you understood my explanation....Happy Learning:)
What organisms consume other living things for food 
Answer:
Heterotrophs
Explanation:
Heterotrophs are known as consumers because they consume producers or other consumers. Dogs, birds, fish, and humans are examples of heterotrophs. Heterotrophs occupy the second and third levels of the food chain, the chains of organisms that provide energy and nutrients to other organisms.
15. A 100 g sample of each of the following metals is heated from 35°C to 45°C. Which metal absorbs
the greatest amount of heat energy?
Metal
4
magnesium
e. copper
copper
magnesium
mercury
silver
lead
b. lead
c. silver
Specific Heat Capacity
0.385 J/(g-°C)
1.02 J/(g-°C)
0.138 J/g °C)
0.237 J/(g-°C)
0.129 J/(g-°C)
d. mercury
The metal that absorbs the greatest amount of heat energy is lead.
Heat energy is the result of the movement of tiny particles called atoms, molecules liquids and gases. Heat energy can be transferred from one object to another. The transfer or flow due to the difference in temperature between the two objects is called heat.
The equation that relates the specific heat capacity to the heat absorbed by the metal is given by:
q= m[tex]C_{p}[/tex]ΔT where q = heat absorbed by the the metal, m = mass of the metal, [tex]C_{p}[/tex] = heat capacity of the metal and ΔT is the change in temperature
In the above given question, the mass of the metal and change in the temperature is the same for all the metals. Therefore, we can determine the metal that will absorb the lowest amount of energy by using the specific heat capacity.
From the equation the heat absorbed by the metal (q) is directly proportional to the specific heat ([tex]C_{p}[/tex]). Hence we can see that lead has the highest specific heat capacity and therefor Lead absorbs the maximum amount of heat.
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Look at the atoms of the molecules used for london dispersion forces and diople-dipole forces. What do you notice about the difference in these atoms and waht explanation do you have for why that difference leads to different intermolecular forces?
The difference between the molecules that have dipole forces and those that have London forces is that the molecules that have dipole forces are polar while those that have London forces are not.
What is the dipole forces?We know that dipole forces are one of the kinds of intermolecular forces that exist. Let us note that a molecule is composed of the primary bond forces that hold the atoms of the molecule together and then the secondary bond forces that do hold the molecules together.
Now, the kind of interactions that exists between the molecules is the reason for the properties of the compound that we see. The molecules have not been shown here but I would discuss the properties of the London forces and the dipole forces.
Note that the molecules that do have the dipole forces have an electronegativity difference between the atoms of the molecule. The molecules that have the London forces are largely non polar.
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a student investigated heat transfer using a bottle of water
The result of the Heat Transfer experiment is given as follows: "The molecule was increased in kinetic energy but in a random structure." (Option B)
What is Heat Transfer?Heat transfer is a thermal engineering subject that deals with the creation, consumption, conversion, and exchange of thermal energy across physical systems.
Heat transmission is categorized into several methods, including thermal conduction, thermal convection, thermal radiation, and energy transfer via phase shifts.
At 3 p.m., the water temperature is raised. The average kinetic energy of an item is related to its temperature. As a result, as temperature rises, so does average kinetic energy.
Kinetic energy is created by the random movement of molecules. Hence, the correct answer is "The molecule was increased in kinetic energy but in a random structure."
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Full Question:
A student investigated heat transfer using a bottle of water. The student placed the bottle in a room at 20.50C. The student measured the temperature of the water in the bottle at 7 a.m. and again at 3 p.m. The data from the investigation are shown in the table below.
[See attached image]
Question:How would you describe the average kinetic energy of the water molecules in the bottle at 7 a.m. to the average kinetic energy of the water molecules in the bottle at 3 p.m.
The molecules were increased in kinetic energy but in a uniform structure. The molecules were increased in kinetic energy but in a random structure. The molecules were decreased in kinetic energy but in a uniform structure. The molecules were decreased in kinetic energy but in a random structure.Sulfur trioxide gas reacts with moisture in the atmosphere to produce
sulfuric acid drops, which can fall as acid rain:
SO3(g) + H₂O(1)→ H₂SO4(1)
What mass in grams of sulfuric acid would be produced by the complete
reaction of 40.01 grams of sulfur trioxide?
The mass in grams of sulfuric acid, H₂SO₄, that will be produced by the complete reaction of 40.01 grams of sulfur trioxide is 49.01 grams
How do I determine the mass of sulfuric acid produced?We'll begin by obtaining the reacting mass from the balanced equation. This is shown below
SO₃(g) + H₂O(l) → H₂SO₄
Molar mass of SO₃ = 32 + (16 × 3) = 80 g/molMass of SO₃ from the balanced equation = 1 × 80 = 80 gMolar mass of H₂SO₄ = (1 × 2) + 32 + (16 × 4) = 98 g/mol Mass of H₂SO₄ from the balanced equation = 1 × 98 = 98 gFrom the balanced equation above,
80 g of SO₃ reacted to produce 98 g of H₂SO₄
Finally, we shall determine the mass of sulfuric acid, H₂SO₄ produced as illustrated below:
From the balanced equation above,
80 g of SO₃ reacted to produce 98 g of H₂SO₄
Therefore,
40.01 g of SO₃ will react to produce = (40.01 × 98) / 80 = 49.01 g of H₂SO₄
Thus, the mass of sulfuric acid, H₂SO₄ produced is 49.01 g
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I need help with this questuon
Following are reactant and product states and the balanced chemical equation for the specified chemical reaction: NaOH(aq)+HCl(aq) → NaCl(aq)+H2O(l)
How do you balance a chemical equation?
Step 1: In both reactants and products, count each kind of atom.
Check whether there is exactly the same amounts of each atom on either side of the arrow. Otherwise, the equation is unbalanced, and you must move on to step 2.
Step 2: To increase the amount of atoms or molecules in the substances, place coefficients in front of the symbols or formulas as necessary. Make use of the fewest coefficients you can. Chemical formulations should never have their subscripts changed. The substances involved in the reaction can be altered by changing subscripts. Only modify the coefficients.
Till the equation is balanced, go back and repeat steps 1 and 2.
Following are reactant and product states and the balanced chemical equation for the specified chemical reaction:
In the reaction between sodium hydroxide and hydrogen chloride, sodium chloride and water are produced.
Hence,
NaOH(aq)+HCl(aq) → NaCl(aq)+H2O(l)
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if a reaction that should theoretically yield 20 g of a product has a 45% yield, what is the actual yield of product
If if a reaction that should theoretically yield 20 g of a product has a 45% yield, The actual yield of product is 9g.
How to find the actual yield?Using this formula to find the actual yield of product
Actual yield of product = Actual yield × Theoretically yield
Where:
Actual yield = 45% or 0.45
Theoretically yield = 20g
Let plug in the formula
Actual yield = 0.45 × 20g
Actual yield= 9g
Therefore the actual yield is 9g.
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Taking into account definition of percent yield, the actual yield of the product is 9 g.
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%:
percent yield= (actual yield÷ theoretical yield)× 100%
where:
The actual yield is the amount of product that is actually formed when the reaction is carried out.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.Actual yield of product in this caseIn this case, you know:
Percent yield: 45%Actual yield: ?Theoretical yield: 20 gReplacing in the definition of percent yield:
45%= (actual yield÷ 20 g)× 100%
45%÷100%= actual yield÷ 20 g
0.45= actual yield÷ 20 g
0.45×20 g= actual yield
9 g= actual yield
Finally, the actual yield is 9 g.
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Determine the number of atoms of O in 7.23 moles of Fe(NO₃)₃.
The number of atoms of Oxygen in 7.23 moles of Fe(NO₃)₃ is 3.92 x 10²⁵.
Determine to total number of individual molecules of Fe(NO₃)₃ in 7.23 moles.
Use Avogadro's number for this: 1 mole = 6.02 x 10²³ molecules.
Thus, 7.23 moles of Fe(NO₃)₃ contains molecules,
7.23 x 6.02 x 10²³ = 4.35 x 10²⁴ molecules of Fe(NO₃)₃.
Determine how many oxygen atoms in one molecule of Fe(NO₃)₃. There are 3 Oxygen atoms in the nitrate NO₃, and 3 nitrate groups in Fe(NO₃)₃. Thus, number of oxygen atoms in Fe(NO₃)₃ is,
3 x 3 = 9 Oxygen atoms in 1 molecule of Fe(NO₃)₃.
Finally, multiply the number of O atoms in 1 molecule of Fe(NO₃)₃ by the total number of Fe(NO₃)₃ molecules.
9 x 4.35 x 10²⁴ = 3.92 x 10²⁵ total Oxygen atoms.
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Question: Children in a tree house lift a small dog in a basket 3.95 m up to their house. If it takes 221 J of work to do this, what is the combined mass of the dog and basket?
Express your answer using three significant figures.
Answer: M = ? kg
The combined mass of the dog and the basket is equal to 5.71 Kg.
What is work?Work can be described as the energy used when applying a force to move an object through a definite displacement.
The work done by a force to move an object through a displacement can be represented as:
W = F.dcosθ
Where θ is angle between displacement and force.
Given, the height the basket lifted up, d = 1.4 m
The angle between force and displacement, θ = 0°
Thus, the work done when lifting the basket is:
W = F d cosθ
W = mg.d cosθ
W = mg.d cos0°
m = W/gd
m = 221/(9.8).(3.95)
m = 5.71 Kg
Therefore, the mass of the basket and dog is equal to 5.71 Kg.
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According to the collision theory of reaction rates, which of the following are true? Choose all that apply. Raising the temperature would increase the rate of the reverse reaction by increasing the number of successful 2 O2 collisions. Increasing the concentrations of O3 + O would increase the rate of the forward reaction. At a higher temperature, the rate of the reverse reaction will increase because the value of ΔE will be smaller than -392 kJ. Increasing the concentration of O3 + O would have no effect on the rate of the forward reaction. In the presence of a catalyst, the value of ΔE will be smaller than -392 kJ.
The given reaction is an exothermic reaction thus, heat is evolved in the reaction. Thus increasing temperature increases the rate of reverse or backward reaction. Increasing concentration of ozone and O will increase the rate of forward reaction.
What is collision theory?According to collision theory, the rate of a reaction depends on the number of effective collisions of the reactants. The given reaction is the combination of ozone with oxygen to give oxygen molecule.
This reaction is exothermic, hence increasing the temperature will effect the equilibrium so as to consume the extra temperature reverse reaction will take place by which collision of O₂ molecules increases.
Similarly increasing the concentration of reactants O₃ and O will increase the rate of forward reaction. The enthalpy change is negative here indicating the reaction is exothermic, thus, increase the temperature and use of catalyst also decreases the activation energy ΔE.
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An atom is found to have 44 Protons.
What would be necessary to balance out the charge, making it a neutral atom?
For any component: Proton count equals atomic number
Number of protons plus number of electrons equals the atomic number.
The number of neutrons is equal to the atomic number-mass number.
What does atomic number mean?The quantity of protons in an element's atom is known as the atomic number. The atomic number of krypton in our illustration is 36. This indicates that the nucleus of a ruthenium atom contains 36 protons.
Every atom of ruthenium has 44 protons, which is intriguing. A Ruthenium atom cannot exist if it does not have 44 protons. A distinct element is produced by changing the number of protons in an atom's nucleus. An atom of rhodium is produced, for instance, by taking one proton away from a krypton atom.
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Give the symbol of the element represented by the following abbreviated electron configuration.
[Ar]4s23d10
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Zinc is the element, that represents the given electronic configuration.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
In the given electron configuration [Ar]4s²3d¹⁰. Argon has 18 electrons. So, we have to add 12 electrons from s and d subshells to 18. The total number of electrons that we get on adding is 30. The element that corresponds to atomic number 30 is zinc that is Zn.
Therefore, Zinc is the element, that represents the given electronic configuration.
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15. What goes in the box for the following fusion
equation?
2 H + 2 H —> (__) + energy
1. 1
The box for the following fusion equation 2 H + 2 H —> (2H₂) + energy
An critical fusion reaction for practical electricity generation is that between deuterium and tritium (the D-T fusion reaction). It produces helium (He) and a neutron (n) and is written D + T → He + n. To the left of the arrow (earlier than the response) there are protons and 3 neutrons. The same is genuine on the proper.
Fusion guarantees a without a doubt endless shape of power that, in contrast to fossil fuels, emits 0 greenhouse gases and, not like the nuclear fission electricity used today, produces no lengthy-lifestyles radioactive waste.three.
Calculation:-
2 H + 2 H —> (2H₂) + energy
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Choose the list that shows the temperatures in order from warmest to coldest.
A) 11°F, 12°F, -11°F, -12°F
B) 12°F, 11°F, -12°F, -11°F
C) 12°F, 11°F, -11°F, -12°F
D) 12°F, -12°F, 11°F, -11°F
Answer: The answer would be C i think
Explanation:
how to increase rate of the reaction "nitrogen with hydrogen"
The reactants' concentration needs to be raised.
What factors influence rate of reaction?
The rate of the reaction controls how quickly the chemical reaction moves forward. The reaction's rate is influenced by a number of variables. These elements are:
(i) The concentration of the reactant: As the reactant concentration rises, the reaction rate does as well.
(ii) The reactant's nature. The condition, reactivity, or solution type of the reactants all have an impact on the reaction's pace.
(iii)The pressure of the gases: As the pressure of the gases involved in a reaction rises, so does its rate.
(iv) The surface area of the solids—As exposed surface area increases, so does the rate of reaction.
Therefore, if we to speed up the process, she should raise the reactant concentration since the more reactant molecules there are, the more molecules will actually collide, which will enhance the rate of the reaction.
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How many moles of argon are in 24.2 g of argon?
24.2 g of Argon has 0.6057 moles in it.
We know that the number of moles in a given mass of an element can be calculated by using the formula
⇒ No. of moles = [tex]\frac{Mass of the element }{Molar mass of the element}[/tex] (i)
Here, the mass of the element Argon = 24.2 grams (ii)
The molar mass of Argon is = 39.948 a.m.u. (iii)
Using the values for the molar mass and mass of the element (ii and iii), we get
⇒ [tex]\frac{24.2}{39.948}[/tex]
⇒ 0.6057 moles present in the given mass of Argon.
Therefore, there are going to be 0.6057 moles in 24.2 g of Argon which is given.
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how many moles of iron (ii) sulphate were reacted during the experiment that produced this equation NaOH(aq) + FeSO(sq) ->Na2SO4(aq) + Fe (OH) 2 (s)
Mole measure the number of elementary entities of a given substance that are present in a given sample. One mole of iron (ii) sulphate were reacted during the experiment.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
The balanced equation is
FeSO[tex]_4[/tex](aq) + 2 NaOH (aq) [tex]\rightarrow[/tex] Fe (OH)[tex]_2[/tex] + Na [tex]_2[/tex] SO [tex]_4[/tex]
Stoichiometry, thet is written in the front of molecule or compound represents the number of moles of that compound. One mole of iron (ii) sulphate were reacted during the experiment.
Therefore, One mole of iron (ii) sulphate were reacted during the experiment.
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Choose the warmer temperature.
-29°f or -39°
Please look at attached image !!!
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore 26.55g of iron is needed to completely consume 18.5L chlorine gas at 25 degree Celsius and 1 atm pressure.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature.
Mathematically the relation between Pressure, volume and temperature can be given as
PV=nRT
where,
P = pressure of chlorine gas =1 atm
V= volume of chlorine gas =18.5L
n =number of moles of chlorine gas
T =temperature of chlorine gas =298K
R = Gas constant = 0.0821 L.atm/K.mol
1 atm×18.5L= 0.0821×n×298K
1 atm×18.5L=n×24.4
n=0.75mol
mass of chlorine=0.75mol×35.453 g/mol
=26.55g
Therefore 26.55g of iron is needed to completely consume 18.5L chlorine gas at 25 degree Celsius and 1 atm pressure.
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What mass of iron starting at 100.0 oC must be added to 50.0 g of water at 25.0 oC to increase the water’s temperature to 65.0 oC? Iron’s specific heat capacity is 0.450 J/(g oC).
The mass of the iron at 100°C is equal to 531.3 grams.
What is the specific heat capacity?The specific heat capacity can be defined as the quantity of heat required to raise the temperature by one-degree Celcius in one unit of substance.
The energy is lost or absorbed will change the temperature of the substance, which can be shown as:
Q = mCΔT
Given, the initial temperature of the iron = 100°C
The initial temperature of water = 25 °C
The final temperature of both iron and water = 65°C
The specific heat capacity of the iron, C = 0.450 J/g°C
Water's specific heat capacity, C = 4.184 J/g°C
Heat lost by Iron (Fe) = Heat absorbed by water
- m × (0.450 J/g°C) × (65 - 100)°C = 50 × (4.184 J/g°C) × (65 - 25)°C
15.75 m = 8368
m = 531.3 g
Therefore, the mass of the iron is 531.3 grams.
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Which compound has the highest molar mass?
polyethylene, a polymer of ethene
octanal, an eight-carbon aldehyde
ethane, a two-carbon hydrocarbon
octane, an eight-carbon hydrocarbon
Relative and average atomic mass both describe properties of an element related to its different isotopes. Out of these two Relative atomic mas is more accurate. The correct option is option A.
What is mass?Mass defines the quantity of a substance. It is measured in gram or kilogram. Average mass is the mass of atoms of an element that are isotopes. It can be calculated by multiplying mass of a isotope to natural abundance of that isotope.
Out of given compound, a polymer of ethene that is polyethylene will have highest molar mass. Polymer is a long chain of same or different monomer unit. Polymer has higher mass than the individual compound.
Therefore, option A is correct.
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Answer: polyethylene, a polymer of ethene