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Determine the number of moles of molecules (or formula units) in each sample.(a) 38.2 g

Chapter 6, Problem 47P

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QUESTION:

Determine the number of moles of molecules (or formula units) in each sample.

(a) 38.2 g sodium chloride

(b) 36.5 g nitrogen monoxide

(c) 4.25 kg carbon dioxide

(d) 2.71 mg carbon tetrachloride

Questions & Answers

QUESTION:

Determine the number of moles of molecules (or formula units) in each sample.

(a) 38.2 g sodium chloride

(b) 36.5 g nitrogen monoxide

(c) 4.25 kg carbon dioxide

(d) 2.71 mg carbon tetrachloride

ANSWER:

Step 1 of 2

Here, we have to determine the number of moles of molecules which is also called as formula units in each sample :

A formula unit in chemistry is the empirical formula where an ionic compound in its simplest and most reduced terms. It is the simplest positive integer ratio of atoms present in a compound

Steps to find the number of moles:

1. Use the periodic table and get the molar mass of each element.

2. Divide the given mass of the sample by the molar mass of each element; this gives the number of moles.

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