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NeX [460]
2 years ago
13

Up late, a tired engineer calculated the molar mass of nitroglycerin (C3H5N3O9) to be 193.7 g/mol, but this incorrect. What is t

he percent error of this incorrect molar mass
Chemistry
1 answer:
sergeinik [125]2 years ago
6 0
  • The atomic mass of carbon is 12.011 g/mol.
  • The atomic mass of hydrogen is 1.00794 g/mol.
  • The atomic mass of nitrogen is 14.0007 g/mol.
  • The atomic mass of oxygen is
  • g/mol.

So, the formula mass of nitroglycerin is3(12.011)+5(1.00794)+3(14.0007)+9(15.9994)=227.0694 \text{ g/mol}}

Therefore, the percent error is

\frac{193.7-227.0694}{227.0694} \times 100=\boxed{-14.70 \% \text{ (to 4 sf)}}

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A 5-kg quantity of radioactive isotope decays to 2 kg after 10 years. Find the decay constant of the isotope.k = _____
Dvinal [7]

Answer:

k = -0.09165 years^(-1)

Explanation:

The exponential decay model of a radioactive isotope is generally given as;

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7 0
3 years ago
When the equation HCl + MnO2 → MnCl2 + H2O + Cl2 is balanced, what is the coefficient for HCl?
s344n2d4d5 [400]
<span>HCl + MnO2 → MnCl2 + H2O + Cl2 
In order to balance this, we have to have the same number of electrons of each element on both sides. Here's how to do it:
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3 years ago
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Answer:

21 Moles of Carbon is reacted

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5 0
3 years ago
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