Chemistry Help Please

Question

If 5.51 g of CuNO3 is dissolved in water to make a 0.340 M What is the volume of the solution in milliliters?

Answer 1

Hi Andrea,

Molarity is moles of solute / liters of solution.

In Cu N O 3 there are 125.2 grams.in a mole.

Cu is 63.5

O is 15.9 x 3 = 47.7

N is 14 x 1 = 14

We h ave 5.51 grams so I divided 5.51 by 125.2 to get .044 moles

then substitute int the formula

.044 moles divided by liters of solution = 0.340 M

solving I got .044 / .0.340 i got .129 of a liter which I multiplied by 1000 because the answer was to be in ml.

Doing the math the final answer is 129 ml noting that I had to keep track of significant figures.

I hope this helps.