Chapter 3: Q21P (page 63)

Express the molecular mass $(\pm u n c e r t a i n t y)$ of $C_{9} H_{9} O_{6} N_{3}$ with the correct number of significant figures.

Short Answer

Expert verified

The molecular mass $(\pm u n c e r t a i n t y)$ of $C_{9} H_{9} O_{6} N_{3}$ with the correct number of significant figures = $255.18402 \pm 0.0002 g / mol$

Step by step solution

To find

The molecular mass $(\pm u n c e r t a i n t y)$ of $C_{9} H_{9} O_{6} N_{3}$ with the correct number of significant figures.

Atomic masses of atoms in the given compound

The atomic mass of a given compound $C_{9} H_{9} O_{6} N_{3}$ is written below:

$C = 12.0106 \pm 0.0002 / \sqrt{3} g / m o l H = 1.00798 \pm 0.00002 / \sqrt{3} g / m o l O = 15.9994 \pm 0.0002 / \sqrt{3} g / m o l N = 14.0068 \pm 0.0002 / \sqrt{3} g / m o l$

Calculate molecular mass of the compound

The standard uncertainty in atomic mass equals to the uncertainty listed in the PSE divided by $\sqrt{3}$ .

The molecular mass is calculated by the following:

$M = 9 C + 9 H + 60 + 3 N = 255.18402 g / m o l$

Calculate the standard uncertainty

$e = \sqrt{0 . 0002^{2} / 3 + 0 . 00002^{2} / 3 + 0 . 0002^{2} / 3 + 0 . 0002^{2} / 3} = 0.0002$

This is the molar mass with uncertainty of:

$255.18402 \pm 0.0002 g / mol$

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Express the molecular mass $(\pm u n c e r t a i n t y)$ of $C_{9} H_{9} O_{6} N_{3}$ with the correct number of significant figures.

Short Answer

Step by step solution

To find

Atomic masses of atoms in the given compound

Calculate molecular mass of the compound

Calculate the standard uncertainty

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Express the molecular mass ±uncertaintyof C9H9O6N3 with the correct number of significant figures.

Short Answer

Step by step solution

To find

Atomic masses of atoms in the given compound

Calculate molecular mass of the compound

Calculate the standard uncertainty

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Kinetics

Chemical Analysis

Organic Chemistry

Inorganic Chemistry

The Earths Atmosphere

Nuclear Chemistry

Study anywhere. Anytime. Across all devices.

Express the molecular mass $(\pm u n c e r t a i n t y)$ of $C_{9} H_{9} O_{6} N_{3}$ with the correct number of significant figures.