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homework help: Calcium metal reacts with water to form calcium hydroxide and hydrogen gas.?
How many grams of hydrogen are formed when 4.42 g of calcium are added to water?
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- BobbyLv 74 months ago
Ca + 2 H2O = Ca(OH)2 + H2
with 4.42 g of Ca we have 4.42g/ 40 g / mol moles of Ca = 0.1105 moles
from the equation we see the moles of H2 formed = 0.1105 moles
mass of H2 gas = 0.1105 moles* 2.01588 g
= 0.223 g of H2
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