Answer:
0.328 M
Explanation:
Pre-Solving
We are given that 6.65 g of salt is dissolved in enough water to make 267.0 mL of solution. We are also given that the mass of the salt is 76.01 g/mol.
We want to find the molarity of this solution.
Recall that molarity is [tex]mol / L[/tex], where the liters is the liters of solution.
So, we need to convert from grams to moles and from mL to liters.
Solving
First, convert from grams to moles. Remember that we were given the molar mass of the salt (76.01 g/mol).
[tex]6.65 g * \frac{1 mol}{76.01g} = 0.08748848835 mol[/tex] (do not round yet, but take note that we need 3 sig figs in the final answer).
Now, convert from mL to L.
267.0 mL => 0.2670 L
Now, divide the moles by the liters.
[tex]\frac{0.08748848835 mol}{0.2670 L } = 0.328 M[/tex]
