Chemistry Help???

Question

An empty beaker weighs 32.4257g. A 10-mL pipet sample of an unknown liquid is transferred to the beaker. The beaker weighs 40.1825g when weighed with the liquid in it. Calculate the density of the unknown liquid.

What are the right number of sig figs???

 

Answer 1

Weight of the empty beaker ,W₁ = 32.4257 g 

Weight of the beaker with liquid,W₂ = 40.1825 g 

Weight of the Liquid,W_liquid = W₁ - W₂

                                        = 40.1825 - 32.4257

                                        = 7.7568 g 

Find the density of the liquid by using the formula:

Density = Mass / Volume 

             = 7.7568 g / 10 mL 

            = 0.77568 g / mL 

            = 0.775 68 kilogram/liter 

             = 775.68 kilogram/cubic meter

So density of liquid is  775.68 kilogram/cubic meter