Question

How many grams of NaCl are contained in 22.0 grams of a 2.5 % by mass NaCl solution?

Answer 1

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$\frac{2.5}{100} \times 22.0 = 0.55$

ANS : 0.55 grams

Answer 2

Answer:

% by mass=mass of solute/mass of solution*100

--2.5=x÷22×100

--⇒x=2.5×22÷100

⇒x=0.55g

Explanation: