What is the mass of the sand in the mixture?What is the mass of the salt in the mixture? What is the sand percent composition in the mixture? What is the salt percent composition in the mixture?

Question

A 3.000 gram sample of a sand/salt mixture is separated into its individual components. The mass of the beaker alone was 105.974 grams, and the mass of the beaker plus the sand was determined to be 107.133 grams.

Answer 1

Find mass of sand:

mass of breaker + sand - mass of beaker = mass of sand

107.133 g - 105.974 g = 1.159 g of sand

Find mass of salt:

total mass of sample - mass of sand = mass of salt

3.000 g - 1.159 g = 1.841 g of salt

Sand % composition = mass of sand/total mass (x100%) = 1.159g/3.000 g (x100%) = 38.63%

Salt % composition = mass of salt/total mass (x100%) = 1.841g/3.000 g (x100%) = 61.37 %