Question

The volume of helium in a blimp is 6.28 × 109 milliliters. The density of helium in the blimp is 0.1786 . Find the mass of the helium in the blimp. (Hint: 1,000 L = 1 cubic meter.) A. 1,120 kg B. 1.12 kg C. 3.52 × 107 kg D. 2,840 kg

Answer 1

As,  

Density = m / V

density of He = 0.1786 kg per meter cube  

V of He =  6.28 x 10 ^ 9 mL  

Conversion of V from mL to  meter cube :

 6.28 x 10 ^ 9  x  1 / 1000  x  1 / 1000  = 6280 meter cube

mass of He from density and V :

6280 x 0.1786 x 1000 / 1 = 1.112 x 10 ^ 6 kg