Question

nmou
0. Which one has same number of atoms as 36 g of water
a) 44 g CO2
b) 2 g H2
c) 28 g C2H4
d)34g NH3​

Answer 1

Answer:

2gH2

it's B

2g H2 has same number of atoms as 36 g of water

Answer 2

Answer:

C2H4

Explanation:

NO.OF ATOMS  IN WATER = NO.OF MOLES × ATOMS× NA

                                             = (GIVEN MASS / GMM) × ATOMS ×NA

                                              =( 36/18) × ATOMS × NA

                                               = 2× 3× NA

                                                =6NA

NO.OF ATOMS IN  C2H4 = (28/28) × 6×NA

                                          = 6NA

GMM OF H20 = 1×2+16 =18

GMM OF C2H4 = 2×12+1×4 = 28