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raketka [301]
3 years ago
5

How much mass would a mole of nitrogen molecules contain? Recall that nitrogen is diatomic. g/mol

Chemistry
1 answer:
prohojiy [21]3 years ago
8 0

Answer:

28 g/mol

Explanation:

1 mole of a substance contains a number of molecules equal to Avogadro number:

N_A=6.022\cdot 10^{23}

This means that 1 mole of nitrogen contains N_A molecules.

1 molecule of nitrogen consists of 2 atoms of nitrogen, each of them with an atomic mass of 14 atomic mass units; so, the total mass of 1 molecule of nitrogen is:

m=2\cdot 14\cdot m_p =2\cdot 14 \cdot (1.66\cdot 10^{-27} kg)=4.65\cdot 10^{-26} kg

where m_p is the mass of one proton.

Therefore, the total number of molecules in 1 mole of nitrogen is equal to the mass of 1 molecule times the total number of molecules:

M=mN_A=(4.65\cdot 10^{-26})(6.022\cdot 10^{23})=0.028 kg

So, 28 g/mol

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The crust is the thickest layer of the Earth.

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3 years ago
Does the moon make its own light? Explain.
-Dominant- [34]

Answer:

No moon has no light.

Explanation:

It only reflects the light coming from the sun. Only star produces light and moon is a satellite that revolvs around the earth.

5 0
3 years ago
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How do you balance this Chemical Equation? <br>C5H12O + O2 = CO2 + H2O​
ICE Princess25 [194]

Answer:

The chemical equation by putting, a 2 on C₅H₁₂O, 15 on O₂, 10 on CO₂ , and 12 on H₂O in the equation;

2C₅H₁₂O + 15O₂ → 10CO₂ + 12H₂O​

Explanation:

  • Chemical equations are balanced by putting coefficients on the reactants and products to ensure the total number of atoms on the left side equal to those on the right side.
  • Balancing chemical equations is done to make chemical equations obey the law of conservation of mass.
  • According to the law of conservation of mass, the mass of the reactants should always be equal to the mass of products.
  • This is done by balancing chemical equations to ensure the total number of atoms on the left side is equal to that on the right side.
  • Therefore, the balanced equation is;

          2C₅H₁₂O + 15O₂ → 10CO₂ + 12H₂O​

3 0
3 years ago
How many moles are in 5.5 x 10-23 molecules of H2O
masha68 [24]

Answer:

0.914moles

Explanation:

The number of moles in a substance can be got by dividing the number of atoms/molecules/particles by Avagadro's constant (6.02 × 10^23).

That is;

number of moles (n) = number of atom (nA) ÷ 6.02 × 10^23

According to this question, there are 5.5 x 10-23 molecules of H2O

n = 5.5 x 10^23 ÷ 6.02 × 10^23

n = 0.914 × 10^(23-23)

n = 0.914 × 10^0

n = 0.914 × 1

n = 0.914moles

6 0
2 years ago
C5H12 + 8O2 → 5CO2 + 6H2O<br><br> Calculate the energy change for the reaction:
KATRIN_1 [288]
C5H12 (l) + 8O2 (g) ----> 5CO2 (g) + 6H2O (l)
Delta H = -3505.8 kJ/mol

C (s) + O2 (g) -----> CO2 (g)
Delta H = -393.5 kJ/mol

H2 (g) + (1/2)O2 (g) ------> H2O (l)
Delta H = -286 kJ/mol

Possible answers:
a. +35 kJ/mol
b. + 1,073 kJ/mol
c. -4,185 kJ/mol
d. -2,826 kJ/mol
e. -178 kJ/mol
8 0
3 years ago
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