What is the mass of calcium reacted with 6 grams of hydrogen?

univerkov | November 29, 2020 | education

let’s compose the reaction equation:
2Ca + H2 = 2CaH
molar mass of calcium – 40 × 2 = 80 g / mol
molar mass of hydrogen – 1 × 2 = 2 g / mol
now we will make a proportion, the mass of calcium will be denoted by x:
x = (80 × 6): 2 = 240 g
answer: m (Ca) = 240 g

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