Question

The molar mass of calcium is 40.08, oxygen is 16.0, and hydrogen is 1.01. What is the mass of one mole of calcium hydroxide (Ca(OH)2)?

Answer 1

Use the formula\[moles = \frac{ mass }{ molar mass }\]
and rearrange to get
\[mass = moles \times molar mass\]
Next you would find the molar mass of Ca(OH)2
which is 40.08 + (16x2) + (1.01x2) = 74.1
Then since we have one mole we just put the numbers into the formula:
mass = 1 x 74.1
mass = 74.1g

Answer 2

add up all the pieces....