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Sagot :
The mass of calcium hydroxide is formed when 10.0g of calcium oxide reacts with 10.0 g of water is 13.024g.
The equation can be written as, CaO + H2O → Ca(OH)2
We have to find the moles of each reactant. We can calculate this by the expression using molar mass and mass of the reactant. the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance which is the number of moles in that sample. Moles can be expressed as,
moles = mass / molar mass
moles of CaO= 10 g/56 g/mole
= 0.179 moles
moles of H2O = 10 g/18 g/mole
= 0.556 moles
when 10.0g of calcium oxide reacts with 10.0g of water we have to calculate mass of calcium hydroxide. we can calculate this by using the expression for molar mass M is the mass of a chemical compound divided by its amount of substance measured in moles. it is expressed as,
mass= moles x molar mass
= 0.176 moles x 74 g/mole
= 13.024 grams
To learn more about Molar mass please visit:
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