Question

How many moles of CO2 are in 870 mL of a 0.75 M solution?

Answer 1

0.75 Molarity means 0.75 moles in 1 Litre of the solution..
The molarity is constant so by the formula, \[M = \frac{ No. of moles }{ Volume of solution ( L)}\]
0.75 = x
---
.87
x= 0.87* 0.75 moles.