JEE Mains 05-Sep-2020 Shift 1 Solved Paper

Number of molecules in a volume of 4 cm3 of a perfect monoatomic gas at some temperature T and at a pressure of 2 cm of mercury is close to ? (Given, mean kinetic energy of a molecule (at T) is 4×10−14 erg, g=980cm∕s2, density of mercury left.=13.6g∕cm3)