Helium has a density of 1.79×10^-4 g/ml at standard temperature and pressure. a balloon has a volume of 6.3 liters. calculate the mass of helium that it would take to fill the balloon. be sure to follow significant figure rules when calculating the answer.

a. 35,000g
b. 1.1×10^-3 g
c. 2.8×10^-5 g
d. 1.1g