# A salt has a mass of 20 grams placed in 250 grams of water. What is the percentage by mass? Please Give The Formula And The Solution Thanks:)

2
by Neo

2015-03-13T17:39:40+08:00

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I'm going to solve it using the GRESA form.

G : m solute = 20 grams; solvent = 250 grams

R : percent by mass

E : % bm =  x 100; solution = solute + solvent

S : % bm =  x 100
=
= 0.08 x 100
= 8

A : 8%

2015-03-18T21:26:11+08:00

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Asked:  What is the percentage by mass?

Percentage by Mass of Solute (salt)

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=                         7.40% (rounded off to the nearest hundredths)

Percentage by Mass of Solvent (water)

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=                           92. 60% (rounded off to the nearest hundredths)