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klasskru [66]
3 years ago
15

A 10.11 g sample of NaBr contains 22.34 % Na by mass. Considering the law of constant composition (definite proportions), how ma

ny grams of sodium does a 7.09 g sample of sodium bromide contain
Chemistry
1 answer:
Ksenya-84 [330]3 years ago
8 0

Answer:

1.58\ \text{g}

Explanation:

10.11 g sample of NaBr contains 22.34% Na by mass

According to the law of constant composition the if one sample of NaBr has 22.34% of Na by mass then any other sample of NaBr will have the same percentage of the amount of Na.

For a sample of 7.09 g we have

7.09\times \dfrac{22.34}{100}=1.583906\approx 1.58\ \text{g}

The mass of sodium in the required sample is 1.58\ \text{g}.

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