Question

If 45.0 mL of a 4.00 M sodium sulfate (Na2SO4) solution is used for a reaction, how many moles of solute were present in the solution?

____ moles

Answer 1

To find the number of moles of solute present in the solution, use the formula Moles = Molarity x Volume. Given that the volume is 45.0 mL and the Molarity is 4.00 M, the number of moles is 0.18 moles.

Step-by-step explanation:

To find the number of moles of solute present in the solution, we can use the formula:

Moles = Molarity x Volume

Given that the volume of the solution is 45.0 mL and the Molarity is 4.00 M, we can plug these values into the formula:

Moles = 4.00 M x 45.0 mL = 0.18 moles

Answer 2

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