Question

Определите относительную молекулярную массу :
1) SO2, N2O5, H2SiO3, Na2SO3, AI(OH)3
2) NO2, P2O5, H2CO3, K2SO4, Cr(OH)3

Answer 1

1) SO₂ = 32 + 16*2=64

N₂O₅ = 14*2 + 16*5 = 108

H₂SiO₃ = 1*2 + 28 + 16*3 = 78

Na₂SO₃ = 23*2 + 32 + 16*3 = 126

Al(OH)₃ = 27 + 16*3 + 1*3 = 78

2) NO₂ = 14 + 16*2 = 46

P₂O₅ = 31*2 + 16*5 = 142

H₂CO₃ = 1*2 + 12 + 16*3 = 62

K₂SO₄ = 39*2 + 32 + 16*4 = 174

Cr(OH)₃ = 52 + 16*3 + 1*3 = 103

Answer 2

1) SO2 - 32+16×2= 64 г/моль

N2O5 - 14+12×5=84

H2SiO3 - 1×2+28+16×3= 78

Na2SO3 - 2×23+32+16×3 = 126

Al(OH)3 - 27+3×17= 78

2) NO2 - 14+2×16= 46 г/моль

P2O5 - 2×31+16×5= 142

H2CO3 = 2×1+12+16×3= 62

K2SO4 - 2×39+32+16×4= 174

Cr(OH)3 - 52+3×17= 103