A carbon atom has a relative atomic mass of
13.3. 60% of the carbon atom has a mass
number of 12.7, 30% of the carbon atom has a
mass number of 13.6, whilst the remaining 10%
has a mass number which is not known.
Calculate the mass number of the carbon isotope
which is 10% of the Carbon 13.3 atom.
Give your answer to 1 decimal place.
Answers
According to the claim, the carbon isotope that is 10% of something like the carbon 13.3 molecule has a mass number of 15.1.
Where can you find carbon?The majority of carbon is kept in reservoirs, or sources, such rocks and sediments; the remaining portion is kept in the atmosphere, the seas, and living things. Through the respiration of both and animals, carbon is returned to the atmosphere. Burning things like wood, oil, and gas also releases it.
Briefing:Since all carbon isotopes have an equal atomic mass of 13.3,
(0.60 * 13.3) + (0.3 * 12.7) + (0.1 * x) = 13.3
11.79 + 0.1x = 13.3
x = 15.1
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Related Questions
Indicate whether each of the following statements about the heme-binding site in myoglobin is true or false. If you think a statement is false, explain why.
a. The proximal histidine covalently binds iron.
b. The distal histidine covalently binds oxygen.
c. The distal histidine binds iron
d. Free heme binds CO with the Fe, C and O atoms in a linear array.
e. The iron in heme binds the oxygen atom of CO
Answers
Answer:
A. True
B. False
C. False
D. True
E. False
Explanation:
A. The proximal histidine covalently binds iron.
This statement is true because the proximal histidine is covalently bonded to the fifth coordination position of iron in myoglobin
B. The distal histidine covalently binds oxygen.
This statement is false because the distal histidine interacts with the oxygen covalently bonded to the sixty coordination position of iron by means of a hydrogen bond not a covalent bond.
C. The distal histidine binds iron
This statement is false because the distal histidine is not bonded to iron but to oxygen but stabilizes the oxygen bonded to iron
D. Free heme binds CO with the Fe, C and O atoms in a linear array.
This statement is true because free heme has more affinity for CO than O2 as it has the least steric hindrance when the Fe, C, and O atoms lie in a straight line. On the other hand, when O2 binds to free heme, the axis of the oxygen molecule is positioned at an angle to the Fe-O bond thereby producing significant steric hindrance.
E. The iron in heme binds the oxygen atom of CO.
This statement is false because the iron in heme binds to the carbon atom, C, of CO rather than to oxygen atom.
What type of energy is transferred during heating?
A. Thermal
B. Temperate
C. Convective
D. Conductive
Thank u for helping !:)
Answers
Answer:
A.) Thermal
Explanation:
I got it correct on founders edtell
What is the final concentration when 250 mL of a 16.0 mol/L nitric acid solution is diluted to 4.5 L?Select one:a.3.5 mol/Lb.8.90 mol/Lc.0.89 mol/Ld.0.35 mol/L
Answers
Chemistry => Solutions => Preparing solutions
We are asked to find the final concentration of the solution that was diluted to 4.5L. For this we will apply the following equation that must have consistency in the units:
\(M_1C_1=M_2C_2\)Where,
M1 is the initial molar concentration, it will have units of mol/L. M1=16.0mol/L
V1 is the initial volume it will have units of liters or milliliters. V1=205mL
We have to convert milliliters into liters, so we take into account that 1L=1000mL. So, we have:
\(\begin{gathered} V_1=250mL\times\frac{1L}{1000mL} \\ \\ V_1=0.250L \end{gathered}\)M2 is the final molar concentration, unknown
V2 is the final volume, 4.5L
So, the final molar concentration will be:
\(\begin{gathered} M_2=\frac{M_1V_1}{V_2} \\ \\ M_2=\frac{16.0mol/L\times0.250L}{4.5L} \\ \\ M_2=0.89mol/L \end{gathered}\)Answer: c. 0.89 mol/L
What is the change in boiling point atb in Celsius of a 0.852m solution of C6H14 in benzene?
Kb(benzene)= 2.65 degrees Celsius/m
Answers
The change in boiling point of C6H14 in benzene is 2.257 degree Celsius.
What is boiling point?
The boiling point is the temperature at which vapor pressure of the liquid is equal to the atmospheric pressure or the temperature at which the liquid phase turns into vapor state. The boiling point of pure water at sea level is 100 degree Celsius.
The change in boiling point can be calculated as,
ΔTb = Kb x m
where ΔTb is change in boiling point, Kb is Ebullioscopic constant and m is molality of the solute.
ΔTb = (2.65 degree Celsius / m) x 0.852m = 2.257 degree Celsius.
Therefore, the change in the boiling point of 0.852m solution of C6H14 in benzene is 2.257 degree Celsius.
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Answer:
The correct answer for ACELLUS is 2.25
Explanation:
Which of these safety features aims to keep nuclear radiation contained
Answers
The safety feature aimed at keeping nuclear radiation contained is steel-reinforced concrete.
What is nuclear power plant?A nuclear power plant is a building with reactors that contain controlled nuclear reactions to produce energy.
Nuclear power plants are able to generate warm water by using atomic properties of matter (i.e.,m the process of nuclear fission), which is in turn converted into steam to move turbines.
The walls of nuclear power reactors are composed of steel-reinforced concrete in order to avoid radiation release.
In conclusion, the safety standard property that maintains nuclear radiation contained is steel-reinforced concrete.
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behavioral and physiological changes in daphnia magna when exposed to nanoparticle suspensions (titanium dioxide, nano-c60, and c60hxc70hx)
Answers
Filter feeders include daphnia.The setose thoracic legs function as sieves to remove detritus, germs, and algae from the water.Before food enters the gut for digestion, daphnia transfer this to the mouth and grind it with their mandibles.Food retention lasts for between one and three hours.
What are some typical factors that affect Daphnia's heart rate?It is well known that high temperatures or anoxic conditions, which result in low oxygen levels, increase the heart rate of daphnia(34) (9).
Why does a Daphnia's heart beat rise when the temperature rises?The rate of physiological processes and chemical reactions inside the organism accelerates as body temperature rises.The rate of cellular respiration accelerates, increasing the need for oxygen and the output of carbon dioxide.This calls for the heart, which pumps blood, to beat more quickly.
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24.Which of the following statements characterizes nuclear fission?Select one:a. Heavy nuclei heated to extremely high temperatures combine, releasing large amounts of energy.b. Lightweight nuclei combine to form heavier, more stable nuclei.c. The splitting of a nucleus released a large burst of energy.d. Unstable nuclei combine and become stable when the available energy is converted into matter.
Answers
Nuclear fission contains :-
C. The splitting of a nucleus released a large burst of energy.
Nuclear fission occurs when a neutron slams into a larger atom, forcing it to excite and split into two smaller atoms also known as fission products. Additional neutrons are also released that can initiate a chain reaction. When each atom splits, a tremendous amount of energy is released.
Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy. While different, the two processes have an important role in the past, present and future of energy creation.
Nuclear energy can be used to create electricity, but it must first be released from the atom. In the process of nuclear fission, atoms are split to release that energy. A nuclear reactor, or power plant, is a series of machines that can control nuclear fission to produce electricity.
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28.The function of the heat exchanger in a nuclear reactor is to...Select one:a. prevent the leakage of radiation into the environment.b. convert water into steam, which turns a turbine.c. cool the reactor water.d. absorb neutrons to slow down the chain reaction.
Answers
Explanation:
A heat exchanger, works like a condenser, where the steam is cooled.
Answer: c. cool the reactor water.
Which has more calories: table sugar or aspartame?
Answers
Hello there!
Aspartame has 4 kilocalories of energy per gram and table sugar has 3.9 kilocalories. They are pretty much same but aspartame is 200 times sweeter than sucrose so probably would be aspartame that has more calories.
Calculate ka for weak acid HA which has a pH of 3.65 at 0.30 concentration.
Answers
Answer:
the Ka value for the weak acid HA is 1.18 x 10^(-7).
Explanation:
The pH of a weak acid solution can be related to the dissociation constant, Ka, of the acid through the following equation:
pH = pKa + log([A-]/[HA])
where pH is the measured pH of the solution, pKa is the negative logarithm of the acid dissociation constant, [A-] is the concentration of the conjugate base of the acid, and [HA] is the concentration of the undissociated acid.
In this problem, we are given the pH and the concentration of the weak acid, HA. We need to find the value of Ka.
First, we can rearrange the above equation to solve for pKa:
pKa = pH - log([A-]/[HA])
Next, we need to find the concentration of the conjugate base, [A-]. Since HA is a weak acid, we can assume that only a small fraction of it has dissociated into A- and H+ ions. At equilibrium, the concentration of A- can be assumed to be equal to the concentration of H+ ions produced by the dissociation of HA. We can calculate this concentration from the pH:
[H+] = 10^(-pH) = 10^(-3.65) = 2.24 x 10^(-4) M
Therefore, [A-] = 2.24 x 10^(-4) M.
We can now substitute the values we have calculated into the equation for pKa to obtain:
pKa = 3.65 - log(2.24 x 10^(-4)/0.30) = 3.65 + 2.47 = 6.12
Finally, we can calculate the Ka value from the pKa:
Ka = 10^(-pKa) = 10^(-6.12) = 1.18 x 10^(-7)
Therefore, the Ka value for the weak acid HA is 1.18 x 10^(-7).
Answer:
the Key value for the weak acid HA is 1.18 x 10^(-7).
Explanation:
The pH of a weak acid solution can be related to the dissociation constant, Key, of the acid through the following equation:
pH = pKa + log([A-]/[HA])
where pH is the measured pH of the solution, pKa is the negative logarithm of the acid dissociation constant, [A-] is the concentration of the conjugate base of the acid, and [HA] is the concentration of the UN dissociated acid.
In this problem, we are given the pH and the concentration of the weak acid, HA. We need to find the value of Ka.
First, we can rearrange the above equation to solve for pKa:
pKa = pH - log([A-]/[HA])
Next, we need to find the concentration of the conjugate base, [A-]. Since HA is a weak acid, we can assume that only a small fraction of it has dissociated into A- and H+ ions. At equilibrium, the concentration of A- can be assumed to be equal to the concentration of H+ ions produced by the dissociation of HA. We can calculate this concentration from the pH:
[H+] = 10^(-pH) = 10^(-3.65) = 2.24 x 10^(-4) M
Therefore, [A-] = 2.24 x 10^(-4) M.
We can now substitute the values we have calculated into the equation for pKa to obtain:
pKa = 3.65 - log(2.24 x 10^(-4)/0.30) = 3.65 + 2.47 = 6.12
Finally, we can calculate the Ka value from the pKa:
Ka = 10^(-pKa) = 10^(-6.12) = 1.18 x 10^(-7)
Therefore, the Ka value for the weak acid HA is 1.18 x 10^(-7).
ACTIVITY 2.: MYSTERY WORD
DIRECTION: Arrange the jumbled letters to form the word that corresponds to its
description.
VRETSRSANE EWVA
Hint: It is a wave in which the direction of the wave's propagation is perpendicular to
the direction of the particles displacement
ECMAHLINAC EVAW
Hint: It is the wave which propagates only in a material or medium.
ALNIDUTGLONI WVEA
Hint: A mechanical wave whose particle displacement is parallel to the direction of
the waves propagation.
LROCGTNEAMECITE EAVW
Hint: It is a wave which does not necessary requires a material medium for its
propagation and own also travel through a vacuum.
REPCMOSISNO
Answers
Answer:
1.transverse waves
2.mechanical waves
3.longitudal waves
4.electromagnetic waves
HQ5.40
Homework Answered Due Today, 11:59 PM
The reaction 3H₂(g) + N₂(g) → 2NH3(g) has an enthalpy of reaction of -92.6 kJ/mol. If 1 g of hydrogen and 2 g of nitrogen are
reacted, how much heat is produced (kJ)?
Answers
The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ
How do i determine the heat energy produced?First, we shall obtain the limiting reactant. Details below:
3H₂ + N₂ -> 2NH₃
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 g Molar mass of H₂ = 2 g/molMass of H₂ from the balanced equation = 3 × 2 = 6 gFrom the balanced equation above,
28 g of N₂ reacted with 6 g of H₂
Therefore,
2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂
We can see that only 0.43 g of H₂ is needed in the reaction.
Thus, the limiting reactant is N₂
Finally, we the amount of heat energy produced. Details below:
3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 gFrom the balanced equation above,
When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.
Therefore,
When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ
Thus the heat energy produced from the reaction is -6.61 KJ
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The graph shows five data points collected in an investigation of the relationship between the concentration of alcohol dissolved in water and its density. The relationship was expected to be linear. Which of the data points most likely resulted from an error in procedure? a 1 b 2 c 4 d 5
Answers
In comparison to modern, highly accurate density meters or pycnometers, hydrometers are far less accurate and temperature.
Thus, Although they require very large sample sizes, hydrometers are rather simple to operate. Usually, 300 to 500 ml per measurement are required. Hydrometers frequently require calibration off-site as well.
With measurements taken by eye, user error is a major issue, and temperature management is especially challenging. Inaccurately bringing and maintaining samples at temperature might take a long time, and once more, user perception of temperature levels is used to determine temperature levels.
Pycnometers and hydrometers have a further problem in that the findings of alcohol measurement are challenging to evaluate and record.
Thus, In comparison to modern, highly accurate density meters or pycnometers, hydrometers are far less accurate and temperature.
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Write the balanced NET ionic equation for the reaction when ZnI₂ and Pb(ClO₄)₂ are mixed in an aqueous solution.
Answers
Answer:
The total ionic equation is:
3 Na+ + PO4-3 + 3H+ + 3Cl- --> H3PO4 + 3Na+ + 3 Cl-
And the net ionic equation is:
3H+ + PO4-3 --> H3PO4
Please help thank you (20 points)
Answers
Answer:
Answer is b gravity only
How many kilojoules of heat are needed to raise the temperature of 10g of aluminum from 22 degrees C to 55 degrees C, if the specific heat of aluminum is .901 j/gc?
Answers
Answer:
name four agricultural inputs are subsidized by the government
0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.
The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.
It is given by the formula -
Q = mcΔT
where, Q = amount of heat
m = mass
c = specific heat
ΔT = Change in temperature
Given,
mass = 10g
c = 0.901J/g⁰C
Initial temperature (T₁) = 22⁰C
Final Temperature (T₂) = 55⁰C
Q = mcΔT
= 10 × 0.901 × (55 -22)
= 297.33 J = 0.297 kJ
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HELP!⚠️ I’ll mark you as brainlist.
Caffeine is a bitter stimulate drug and is found in vary quantities. It’s formula is C8H10N4O2. Match the number of moles of each element found
• numbers are 1.2, 2.0, 4.0, 5.0, 8.0, 10, 16, 27
• There are ___ mol of nitrogen in 0.30 mol
• There are ___ mol of hydrogen in 2.7 mol caffeine
• There are ___ mol of carbon in 2.0 mol caffeine
• There are __ mol of oxygen in 2.5 mol of caffeine
Answers
Answer:
• There are 1.8 mol of nitrogen in 0.30 mol of caffeine.
• There are 21.6 mol of hydrogen in 2.7 mol of caffeine.
• There are 16.0 mol of carbon in 2.0 mol of caffeine.
• There are 5.0 mol of oxygen in 2.5 mol of caffeine.
Explanation:
Using this information, we can calculate:
There are 4.8 x 10^23 (1.2 x 4) nitrogen atoms in 0.30 mol of caffeine.
There are 1.62 x 10^24 (2.7 x 6) hydrogen atoms in 2.7 mol of caffeine.
There are 1.6 x 10^24 (2 x 8) carbon atoms in 2.0 mol of caffeine.
There are 2.7 x 10^24 (2.5 x 2 + 8 x 2) oxygen atoms in 2.5 mol of caffeine.
To find the number of moles of each element, we just need to divide the number of atoms by Avogadro's number:
There are 0.8 mol of nitrogen in 0.30 mol of caffeine.
There are 2.7 mol of hydrogen in 2.7 mol of caffeine.
There are 0.2 mol of carbon in 2.0 mol of caffeine.
There are 1.5 mol of oxygen in 2.5 mol of caffeine.
1. Write the IUPAC names for the following 1.1 1.2 N 1.3 O NO2 x Y ·0 OH 5
Answers
1. The IUPAC name of N is nitrogen.
2. Nitrogen dioxide
3.The IUPAC name of O is oxygen
4.The IUPAC name of OH is hydroxyl.
The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.
IUPAC names for the given compounds are:1.1. N: Nitrogen
The IUPAC name of N is nitrogen.
It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide
Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.
The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen
Explanation: The IUPAC name of O is oxygen.
It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.
X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.
Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.
It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.
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Note: The complete question is given below
Provide the IUPAC names for the following compounds:
\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)
C6H5CH(CH3)2
H2NCH2CH2CH2CH2CH2NH2
CH3CH2CH2CH2CH2OH
CH3CH2CH2CHOHCH3
Does a reaction occur when aqueous solutions of chromium(III) bromide and manganese(II) nitrate are combined?
If a reaction does occur, write the net ionic equation.
Answers
Answer:
Yes the reaction occur when aqueous solutions happened
ethanol has a density of 0.789 g/cm3, how many pounds of ethanol would be in a drum containing 7.0 gallons of ethanol
Answers
From the density of ethanol given, the number of pounds of ethanol in the drum will be 46.099 pounds.
How to calculate densityDensity of ethanol = 0.789/cm³
1 gallon = 3785.4ml
Volume of ethanol = 7 gallons = 7 × 3785.4ml = 26497.8ml
Mass of ethanol = Volume × Density.
= 26497.8 × 0.789
= 20906.764g
Since 1g = 0.002205 pounds, the mass of ethanol will be:
= 20906.764 × 0.002205
= 46.099 pounds.
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S8 + 12O2 -------> 8SO3
If you start with 873.2 g of S8 and 859.3 g of O2, what mass of SO3 will be produced?
Answers
The balanced chemical equation is:
S8 + 12O2 → 8SO3
The molar mass of S8 is 256.52 g/mol. Therefore, the number of moles of S8 is:
n(S8) = mass / molar mass = 873.2 g / 256.52 g/mol = 3.4 mol
The molar mass of O2 is 32.00 g/mol. Therefore, the number of moles of O2 is:
n(O2) = mass / molar mass = 859.3 g / 32.00 g/mol = 26.85 mol
According to the balanced chemical equation, the stoichiometric ratio of S8 to O2 is 1:12. Therefore, the number of moles of O2 needed to react with all of the S8 is:
n(O2) needed = n(S8) × 12 = 3.4 mol × 12 = 40.8 mol
Since the number of moles of O2 available (26.85 mol) is less than the number of moles of O2 needed (40.8 mol), O2 is the limiting reactant.
The theoretical yield of SO3 is based on the number of moles of O2 used. Since 12 moles of O2 are required to produce 8 moles of SO3, the number of moles of SO3 produced is:
n(SO3) = n(O2) × (8/12) = 26.85 mol × (8/12) = 17.90 mol
The molar mass of SO3 is 80.06 g/mol. Therefore, the mass of SO3 produced is:
mass(SO3) = n(SO3) × molar mass = 17.90 mol × 80.06 g/mol = 1433 g
Therefore, the mass of SO3 produced is 1433 g.
A liquid ester used to flavour food is believed to be impure. What would be the best way of testing its purity?
Answers
Answer:
Filter it
Explanation:
What is the molar concentration of Zn2+ ions in a solution, if the electrode potential value is 59mV less than the standard electrode potential value at 298 K?
Answers
Molar concentration of Zn2+ions in a solution is 3.481 mol/lit
The electrode potential value is 59mV
Temperature=298k
What is electrode potential?
It is a force of galvanic cell. basically it is the difference between an electrolyte and electrode.equation formed- Zn → Zn2+ + 2e
from Nernst equation-
E=E cell - 0.059 log [Zn2+]
[zn2+]=3.481 mol/lit
hence, Molar concentration of Zn2+ions in a solution is 3.481 mol/lit
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The value of K for the reaction below is 6.71 at 465 K.
2NO₂(g) <—>N₂04 (g)
Determine the reaction quotient for a mixture of the two gases in which [NO₂] = 0.0212 M and [N₂O4] = 0.00553 M.
Answers
The reaction quotient from the calculation is obtained as 12.3
What is the reaction quotient?
The reaction quotient, Q, is a mathematical expression used in chemistry to predict the direction a chemical reaction will proceed under non-standard conditions.
It is calculated in the same way as the equilibrium constant, K, but uses the concentrations (or partial pressures) of the reactants and products at any given moment during a reaction, rather than at equilibrium.
We already know that the reaction quotient would refer to the non equilibrium conditions. Thus we have that;
Q = [N₂04]/[NO₂]^2
Q = 0.00553/(0.0212)^2
Q = 12.3
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Calculate the energy of a photon of radiation with a frequency of 8.5 x 10¹ Hz
Use this calculator to submit your answer in a decimal form.
Type your answer...
Answers
Answer: 0.85 hertz
Explanation: Calculator said so also 0.85 is decimal form for 85
PLEASE ANSWER QUICKLY!!!!
2KI (aq) + Cl₂(g) → 2KCl(aq) + 1₂(g)
What volume of 12 gas forms when
21 L Cl2 react at STP?
[?] L 12
Answers
The volume of 12 gas forms when 21 L Cl2 react at STP is 21 L.
To determine the volume of 12 gas (I assume you mean I2 gas) formed when 21 L of Cl2 reacts at STP (standard temperature and pressure), we need to use the ideal gas law equation.
The ideal gas law equation is given by:
PV = nRT
Where:
P = pressure
V = volume
n = number of moles
R = ideal gas constant
T = temperature
At STP, the pressure is 1 atm, and the temperature is 273.15 K.
From the balanced equation, we can see that the molar ratio between Cl2 and I2 is 1:1. So, if 21 L of Cl2 reacts, it will produce an equal volume of I2 gas.
Given that the volume of Cl2 is 21 L, we can assume the volume of I2 gas formed will also be 21 L.
Therefore, the volume of I2 gas formed is 21 L.
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Ea represents the . . .
energy released by the reaction.
potential energy of the reactants.
sum of the reactants and products energies.
minimum energy particles must have in order to react
Answers
Ea, or activation energy, represents the minimum energy particles must have in order to react. In chemical reactions, particles must collide with enough energy to break the bonds between atoms and form new ones. However, not all collisions result in a reaction - some may not have enough energy to overcome the activation energy barrier.
Therefore, Ea acts as a threshold energy that particles must surpass to initiate a reaction.
The value of Ea is specific to each reaction and is determined by the nature of the reactants and the mechanism of the reaction. Some reactions have a low Ea, meaning they require only a small amount of energy to occur, while others have a high Ea and require a larger input of energy.
Ea can be influenced by various factors such as temperature, pressure, and catalysts. Increasing temperature or pressure can increase the kinetic energy of particles, making them more likely to collide with enough force to overcome the activation energy barrier. Catalysts, on the other hand, lower the activation energy by providing an alternate pathway for the reaction that requires less energy.
Overall, Ea plays a crucial role in determining whether a chemical reaction will occur. By understanding the concept of activation energy and the factors that influence it, scientists can design reactions and develop catalysts that are more efficient and effective.
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Given the reaction: Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
The reaction occurs more rapidly when a 10-gram sample of Mg is powdered rather than in one piece, because powdered
Mg has
1. less surface area
2. more surface area
3. a lower potential energy
4. a higher potential energy
Answers
19.If the chemical equation below is balanced using only whole numbers, what is the smallest whole-number coefficient for water?__ Fe2O3 + __ H2 ---> __ Fe + __ H2OSelect one:a. 1b. 2c. 3d. 4
Answers
Answer:
c. 3
Explanation:
To find the coefficient for water, we have to balance the chemical reaction:
\(Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\)So, the smallest coefficient for water is 3.
A gas occupies a volume of 1.0 L at 25°C. What volume will the gas occupy at 100°C?
A)
4.0 L
B)
0.80 L
C)
1.3 L
D)
1.0 L
Answers
Answer:
A
Explanation:
1.0 L * 4 = 4L volume that the gas can occupy at 100 degree Celsius