Question

question 3 (multiple choice worth 4 points)
(05.05r mc)

what mass of \\(\text{o}_2\\) can be generated by the decomposition of 100.0 grams of \\(\text{naclo}_3\\)?

\\2\text{naclo}_3 \
ightarrow 2\text{nacl} + 3\text{o}_2\\

• 30.48 g
• 90.2 g
• 46.2 g
• 45.1 g

Explanation:

Calculate molar masses of reactants and products

$$
LATEXBLOCK0
$$

Convert mass of reactant to moles

$$ n(\text{NaClO}_3) = \frac{100.0\text{ g}}{106.44\text{ g/mol}} \approx 0.9395\text{ mol} $$

Calculate mass of oxygen gas produced

$$
LATEXBLOCK1
$$

Answer:

• (A) 30.48 g
• (B) 90.2 g
• (C) 46.2 g
• (D) 45.1 g (Correct answer)