Question

1. choose the best answer. scientists discover the percent composition for iron sulfate (feso₄) shown in the following table. (table with fe: 36.7%, s: 21.1%, o: 42.2%) what does this data show? there are 57.8 moles remaining if s is removed. for every 100 g of feso₄, there are 21.1 g of s. for every 100 g of feso₄, there are 36.7 g of s. there are 42.2 moles of s in feso₄. 12. choose the best answer. according to the law of definite proportions, if the percent composition of calcium chloride is 63.96% chlorine, how much calcium is present? cannot be determined with information given 36.04% 31.98% 35.45%

Explanation:

Step1: Calculate % calcium in CaCl₂

$\text{Percent Ca} = 100\% - 63.96\% = 36.04\%$

Step2: Analyze FeSO₄ percent composition

Percent composition means mass per 100g sample.

Answer:

1. C. 36.04%
2. For every 100 g of FeSO₄, there are 21.1 g of S.