How many moles of in 30.0 grams of Ca(OH)2? (one-step problem) a0.405 mol b74.09 mol c2,222 mol d1.52 mol e30.00 mol
Question
How many moles of in 30.0 grams of Ca(OH)2?
Options:
- a) 0.405 mol
- b) 74.09 mol
- c) 2,222 mol
- d) 1.52 mol
- e) 30.00 mol
Solution
To solve this problem, we need to use the formula for calculating moles, which is:
moles = mass / molar mass
First, we need to calculate the molar mass of Ca(OH)2. The molar mass of Ca is approximately 40.08 g/mol, the molar mass of O is approximately 16.00 g/mol, and the molar mass of H is approximately 1.01 g/mol.
So, the molar mass of Ca(OH)2 is 40.08 g/mol (for Ca) + 2 * (16.00 g/mol (for O) + 1.01 g/mol (for H)) = 74.10 g/mol.
Now, we can calculate the number of moles in 30.0 grams of Ca(OH)2:
moles = 30.0 g / 74.10 g/mol = 0.405 mol
So, the answer is a) 0.405 mol.
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