example: What is the percent by mass concentration of a solution
that contains 5.30g of salt dissolved in 19.7g of water?
Step-by-step explanation:
percent by mass concentration means how many percent does the solution contain mass of salt from the total mass of the solution
total mass = 5.3g (salt) + 19.7g (water) = 25 g (solution)
percent by mass concentration = 5.3 / 25 = 0.212 = 21.2 %
Answer: 21.2 %
