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Compounds A and B are colorless gases obtained by combining sulfur with oxygen.

ID: 637644 • Letter: C

Question

Compounds A and B are colorless gases obtained by combining sulfur with oxygen. Compound A results from combining 6.00 g of sulfur with 5.99 g of oxygen, and compound B results from combining 8.60 g of sulfur with 12.88 g of oxygen. Show that the mass ratios in the two compounds are simple multiples of each other.

S:O mass ratio in substance AS:O mass ratio in substance B = 34 S:O mass ratio in substance AS:O mass ratio in substance B = 23 S:O mass ratio in substance AS:O mass ratio in substance B = 21 S:O mass ratio in substance AS:O mass ratio in substance B = 43   S:O mass ratio in substance AS:O mass ratio in substance B = 32    S:O mass ratio in substance AS:O mass ratio in substance B = 12

Explanation / Answer

Determine the mass ratio of each compound

S:O mass ratio in compound A = 6/5.99

S:O mass ratio in compound B = 8.60/12.88

(S:O mass ratio in compound A) : (S:O mass ratio in compound B) = (6/5.99) : (8.60/12.88)

= 3 : 2

These are whole numbers so the mass ratios in the two compounds are simple multiples of each other.

Option E is the correct answer

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