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A 12.2-g sample of x reacts with sample of y to form 78.9g of xy what is the mass of y that reacted?

Updated: 4/28/2022

Wiki User

∙ 14y ago

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-66.7

Laila Emard ∙

Lvl 10

∙ 3y ago

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Wiki User

∙ 14y ago

x+y = 78.9g
x = 12.2g
y = 78.9g - 12.2g = 66.7g

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Q: A 12.2-g sample of x reacts with sample of y to form 78.9g of xy what is the mass of y that reacted?

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How many ounces in a gallon of gasoline?

A US Gallon of ethanol contains 3.785 liters and each liter weighs 0.789 kg. A Mole weight of ethanol is 46.06 g.So...Moles/gallon ethanol= (3.785 L)x(789g/L)/(46.06g/mole) = 63.84Assuming you need to show how the units cancel out I've indicated what they are.The answer is not quite correct in the real world as ethanol is produced at about 96% purity if not denatured. The 4% or so is water.Added:The last addition is correct and can be easily re-calculated knowing two things:1. the density of 96% ethanol + 4% water is a bit higher: 799 g/L2. 96% means 96% by volume (0.960 L per 1.00 Litre)Newly calculated:(0.960L/1.00L)(3.785 L)x(799g/L)/(46.06g/mole) = 63.03 mol ethanol in a gallon 96% alcohol

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A 12.2-g sample of x reacts with sample of y to form 78.9g of xy what is the mass of y that reacted?

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