Calculate the molarity of 25.0 grams of KBr dissolved in 750.0 mL

Convert the grams to moles

25.0g/119.0g/mol = 0.210mol

Convert the ml to L

1L=1000ml

= 750ml

750ml/1000 = 0.750L

molarity = moles of solute/liters of solution

= 0.210/0.750

= 0.28M

The formula for molarity is m=mol/L. Before substituting the values, you need to convert the given mass to moles.

The solution is: (25.0 g KBr) (1 mole/119.002 g KBr) = 0.21 mol KBr

Now, substitute this value to the formula for molarity.

0.21 mol KBr/0.750 L = 0.28 mol/L

The final answer is 0.28 mol/L.