How many moles of CaCl2 are in 250 mL of a 3.0 M of CaCl2 solution?

Answer 1

to find Moles use the equation:
Molarity = moles/Litres
molarity = 3.0M
moles = ?
Litres = 0.25L
so rearrange the equation to get
Molarity X Litres = moles
3.0M X 0.25L = moles
= 0.75
Therefore there are 0.75 moles of CaCl2 in the solution

Answer 2

"3.0M" means 3 moles per liter. Since you have 250 ml, or one quarter of a liter, you have 3/4 of a mole of CaCl2.

In terms of the individual elements, you have 3/4 mole of Ca and 1.5 moles of Cl.

Answer 3

1.45395moles