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Author Question: A 25 g sample of sugar is found to contain 51.4% oxygen by mass. Another 250 g sample of the same ... (Read 63 times)

kshipps

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Question 1

A 1.4 g sample of calcium is reacted with 3.2 g of oxygen. The only product after the reaction is 1.96 g of CaO. How many grams of oxygen remains unreacted?
◦ 0.56 g
◦ 0.224 g
◦ 2.64 g
◦ 0.264 g
◦ 0.203 g

Question 2

A 25 g sample of sugar is found to contain 51.4% oxygen by mass. Another 250 g sample of the same sugar is also 51.4% oxygen by mass. This is consistent with the:
◦ law of conservation of mass
◦ law of constant composition
◦ law of multiple proportions
◦ first assumption of Dalton's atomic theory
◦ second assumption of Dalton's theory


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Marked as best answer by kshipps on Jul 8, 2021

leahchrapun

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kshipps

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Reply 2 on: Jul 8, 2021
Excellent


upturnedfurball

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Reply 3 on: Yesterday
Great answer, keep it coming :)

 

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