4 moles of ca OH 2 weight
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74.093 g/mol
Calcium hydroxide/Molar mass
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Given:
The number of moles of Ca(OH)₂ = 4
To Find:
The weight of the given sample of Ca(OH)₂
Solution:
The mass of 1 mole of any substance is equal to the molar mass of the substance.
The molar mass of Ca(OH)₂ = 1 X Molar mass of Ca + 2 X (Molar mass of O + Molar mass of H)
We know that,
The molar mass of Ca =40g
The molar mass of O = 16g
The molar mass of H = 1g
Substituting,
The molar mass of Ca(OH)₂ = 1 X 40 + 2 x (16+1)
= 40 + 34
= 74g
So, 1 mole of calcium hydroxide weighs 74g
⇒ 4 moles of calcium hydroxide weighs 74g X 4 = 296g.
Hence, the weight of 4 moles of Ca(OH)₂ is 296g
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