Answer: 1.12×10^6 Kg
Explanation:
Given volume = 6.28*10^9 mL
= 6.28*10^6 L ............. (1)
Also, we are given specific density of helium = 0.1786
Specific density of helium = density of helium/density of water
0.1786 = density of helium/1000 Kg/m3
Density of helium = 0.1786*1000 Kg/m3
= 178.6 Kg/m3
Since 1000L = 1 m3
Density of helium =178.6/1000 Kg/L
Density of helium = 0.1786 Kg/L ...(2)
Hence,
Density = Mass/Volume
Mass = Density × Volume
Sub. Equation (1) and (2)
Mass = 6.28×10^6 ×0.1786 Kg
Mass = 1.12 ×10^6 Kg
