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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 76 times)

kshipps

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on: Jul 8, 2021

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
General Chemistry: Principles and Modern Applications ¦ Petrucci, Herring, Madura, Bissonnette ¦ 11th Edition
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Marked as best answer by kshipps on Jul 8, 2021

leahchrapun

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Reply #1 on: Jul 8, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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kshipps

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Reply 2 on: Jul 8, 2021
YES! Correct, THANKS for helping me on my review

mammy1697

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Reply 3 on: Yesterday
Gracias!

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