Question

A solution of salt and water contains 75 grams of water per 150 milliliters of the solution. If 1 mole of water weighs 16 grams, _____ moles of water would be present in 30 milliliters of the solution. [Round off your answer to two decimal places]

Answer 1

@Night-Watcher

Answer 2

75 grams of water is to 150 milliliters of the solution
and X grams of water is to 30 milliliters of the solution

by ratio and proportion
75/150=X/30
so you will get the value of X
X=15

15 grams of water is to 30 milliliters of the solution

by ratio and proportion again
1 mole of water is to 16 grams
and X moles of water is to 15 grams which we solved earlier (30 milliliters)

so 1/16=X/15
the X will be solved
X=0.9375=0.94 moles

Answer 3

here u go

Answer 4

thankyou :)

Answer 5

welcome