Homework Answers
Molarity = moles of solute/litres of solution
Molarity = 3.5 x 10-9
litres of solution = 1L
moles of solute = molarity x litres of solute
moles of solute = 3.5x10-9x 1 L
moles of solute = 3.5x10-9 moles
1 mole = 6.02 x 1023molecules
so total molecules in 3.5x10-9 moles = 3.5x10-9 x 6.02 x 1023 =
21.07 x 1014 or 2.1 x 1015molecules.
So the answer is 2.1 x 1015molecules
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