Question

calculate the no of moles for the following (1) 12.046×10 ki power h 23 no of the atom (2) 56 of he

Answer 1

1). 1 mole = 6.022×10^23
6.022×10^23 atoms = 1mole
2). no. of moles of helium = given mass of helium/molar mass of helium = 56g/28g = 2 moles