tolong jawab yang nomor 1 dan 2 terimakasih

1.
massa = n x Mr
11 g = n x 44
n = 1/4 mol

0C, 1 atm ( STP )
V = n x 22.4 (STP)
V = 1/4 x 22.4 = 5.6 L

2.
V= n x 22.4
5.6 = n x 22.4
n = 1/4 mol

massa = n x Mr
masssa = 1/4 x 18
massa = 4.5 gr