A sample of potassium chloride has a concentration of 10 g/dm3. What mass of potassium chloride is dissolved in 400 cm3 of water?
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Answer:
25g
Explanation:
1 decimeter cube=1000cm cube
so
in dm3,10g of KCl is dissolved.
which means that 10g of KCl is dissolved in 1000cm3.
so we can convert 400 cm3 to 0.4 dm3
As
CONCENTRATION = MASS ÷ VOLUME
10 = mass ÷ 0.4
mass = 10 ÷ 0.4
which is
25.
So 25 g of KCl dissolves in 400 cm3 of water
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