Question

calcule a massa molar das seguintes substâncias:
(dados): H=1; C=12; N=14; O=16; Na=23; AI=27; P=31 S=32; Ca=40)
A)C₁₀H₂₂
B)Na₃PO₄
C)H₂SO₄
D)C₆H₁₂O₆
E)AI₂SO₄
F)CaCO₃
G)HNO₃
H)P₂O₅

Answer 1

a. (C= 12 × 10 = 120)

(H= 1 × 22 = 22)

$120 + 22 = 142$

b. (Na= 23 × 3 = 69)

(P= 31 ×1 = 31)

(O= 16 × 4 = 64)

$69 + 31 + 64 = 164$

c. (H= 1 × 2 = 2)

(S= 32 × 1 = 32)

(O= 16 × 4 = 64)

$2 + 32 + 64 = 98$

d. (C= 12 × 6 =72)

(H= 1 × 12 =12)

(O= 16 × 6 =96)

$72 + 12 + 96 = 180$

e. (Al= 27 × 2 =74)

(S= 32 × 1 = 32)

(O= 16 × 4 =64)

$74 + 32 + 64 = 170$

f. (Ca= 40 × 1 =40)

(C= 12 × 1 =12)

(O= 16 × 3 =48)

$40 + 12 + 48 = 100$

g. (H= 12 × 1 =12)

(N= 14 × 1 =14)

(O= 16 × 3 =48)

$12 + 14 + 48 = 74$

h. (P= 31 × 2 =62)

(O= 16 × 5 =80)

$62 + 80 = 142$

a) 142u

b) 164u

c) 98u

d) 180u

e) 170u

f) 100u

g) 74u

h) 142u