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2016-06-13 4:23 am

14. Plants are equipped with a mitochondria that is able to store energy in the bonds of a chemical. Plants and animals depend on this chemical (glucose) as an energy source. What is the chemical formula for glucose? How many molecules of glucose are there in 1.3 g of glucose that were extracted from berries.

15. One disadvantage of burning propane (C3H8) is that carbon dioxide is one of the products. The released carbon dioxide increases the amount of CO2 in the atmosphere and increases the effects of global warming. How many moles of CO2 would you say is produced when 86.3 moles of propane is burned in excess oxygen in a gas grill?

16. When hydrogen gas is cooled to sufficiently low temperatures, it condenses to form a liquid that can be used to power nonpolluting vehicles in which its reaction with oxygen (from the air) yields an exhaust containing only water vapor. If 3.96 X 103 g of hydrogen are used up for a trip to cedar point how many grams water vapor is released into the atmosphere?

回答 (1)

fooks

2016-06-13 4:56 am

✔ 最佳答案

14.
Chemical formula of glucose : C₆H₁₂O₆

Molar mass of C₆H₁₂O₆ = (12×6 + 1×12 + 16×6) g/mol = 180 g/mol
No. of moles of C₆H₁₂O₆ = (1.3 g) / (180 g/mol)

1 mole of C₆H₁₂O₆ contains 6.022 × 10²³ molecules.
No. of C₆H₁₂O₆ molecules = [(1.3 g) / (180 g/mol)] × (6.022 × 10²³ /mol) = 4.3 × 10²¹

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15.
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

No. of moles of CO₂ produced = (86.3 mol) × 3 = 258.9 mol

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16.
2H₂ + O₂ → 2H₂O

No. of moles of H₂ = (3.96 × 10³ g) / (1 × 2 g/mol) = 1.98 mol
No. of moles of H₂O released = 1.98 mol
Mass of H₂O released = (1.98 mol) × [(16 + 1×2) g/mol] = 35.6 g

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