Asked by fgf

Calculate the number of moles required to make 100 mL of a 3.0 M solution of CuSO4·5 H2O.
is the answer .03? if not walk me through the steps thanks

Answers

Answered by Jai
Recall that molarity is moles of solute per liter of solution. It has mol/L (or M) units.
M = n/V

First, we convert the volume (100 mL) to liters units. To convert, we just divide it by 1000:
100 / 1000 = 0.1 L
Since we need to calculate the moles, we rearrange the formula to get n:
n = M*V
Substituting,
n = 3.0 M * 0.1 L
n = 0.3 mol CuSO4·5H2O

hope this helps~ `u`
Answered by MathMate
Note: 1L = 1000mL, so 100mL = 0.1L

Use proportions:
3 mol are required to make 1 L of 3.0M solution.
x mol are required to make 0.1 L of 3.0M solution.
x=3 mol * 0.1L /(1L)
=0.3 mol
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