Answer:
The answer is 0.1 mol
Explanation:
To find out the number of moles we use the formula
[tex]n = \frac{m}{M} \\ [/tex]
where
n is the number of moles
M is the molar mass
m is the mass of the substance
From the question
m = 400 g
M of Ca = 40 g/mol
We have
[tex]n = \frac{40}{400} = \frac{1}{10} \\ [/tex]
We have the final answer as
0.1 mol
Hope this helps you
