Question

1. The normal cholesterol concentration in human blood is 200mg/100mL, what will it be in gram/L?

The mass of a metal is 39.54 grams. it was lowered in a graduated cylinder with the initial volume of water at 20.0 mL, the final volume was 40.0 mL. what is the density of Aluminum? What is the specific gravity?

Answer 1

1) Given concentration is 200 mg/100 ml

                               

                                =   2 gram/L

2) Subtract the initial volume from the final volume to get the volume of the substance that displaces the water

     That means 40-20 =20 ml

   Aluminium Density = mass/Volume = 39.54 grams/ 20 ml

                                           = 1.977 g/ml = 1.977 g/cm^3

3) The specific gravity of a substance is the ratio of its density to that of water

     The density of water is 1 g/cm^3

    Hence the specific gravity of aluminium = 1.977