What mass of solute is contained in 64.9 mL of a 2.00 M sodium bromide solution?
A) 13.4 g
B) 3.34 g
C) 0.0649 g
D) 0.130 g
E) 0.206 g

Question

Quizplus · Accepted Answer

First, we need to use the formula:

moles of solute = Molarity x Volume(in liters)

Converting mL to L, we get:

64.9 mL = 0.0649 L

Now, plugging in the values we have:

moles of solute = 2.00 M x 0.0649 L
moles of solute = 0.1298 moles

Finally, we need to use the formula:

mass = moles x molar mass

The molar mass of sodium bromide is:

NaBr = 22.99 g/mol (for Na) + 79.90 g/mol (for Br)
NaBr = 102.89 g/mol

Plugging in the values we have:

mass = 0.1298 moles x 102.89 g/mol
mass = 13.4 g

Therefore, the answer is A) 13.4 g.

What Mass of Solute Is Contained in 64