Bài 1:
MA = dA/kk . 29 = 2 . 29 = 58 ( g/mol )
MB = dB/kk . 29 = 1,517 . 29 = 43,993 = 44 ( g/mol)
MC = dC/kk . 29 = 2,2069 . 29 = 64 ( g/mol )
Bài 2:
a) nO = 9. 1023 : N = (9 . 1023) : (6. 1023) = 1,5 (mol)
b) VO = nO . 22,4 = 1,5 . 22,4 = 33,6 (lít)
mO = nO . MO = 1,5 . 32 = 42 (g)