You are instructed to make 250 ML of a 1.5 M potassium nitrate solution. How many moles of substance will be present in the solution ?

1 Answer
Junaid Mirza
May 20, 2018

#"0.375 mol"#

Explanation:

Molarity is given by the formula

#"Molarity" = "Moles of solute"/"Volume of solution (in litres)"#

#"1.5 M" = "n"/(250 × 10^-3\ "L")#

#"n = 1.5 M" × 250 × 10^-3\ "L = 0.375 mol"#

∴ There are #"0.375 mol"# of potassium nitrate in the solution.

[Note: I believe #"250 ML"# in the question means #250# milliliters.]

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