Question

Hitunglah massa dari
A. 0,5 mol natrium (Na)
B. 0,5mol natrium klorida(NaC1)
C. 0,4mol natrium sulfat (Na²SO⁴)
D. 0,4mol asam sulfat (H²SO⁴)

Answer 1

Ar Na = 23

Ar Cl = 35.5

Ar S = 32

Ar H = 1

Ar O = 16

A. 0.5 × 23 = 11.5 gr

B. 0.5 × (58.5) = 29.25 gr

C. 0.4 × (142) = 56.8 gr

D. 0.4 × (98) = 39.2 gr

Answer 2

n = m/mr

m = n x mr

A. 0.5 mol NA

m = 0.5 x 23

= 11.5 gr

B. 0.5 mol NaCl

m = 0.5 x 58

= 29

C. 0.4 mol Na2SO4

m = 0.4 x 142

= 56.8

D. 0.4 mol H2SO4

m = 0.4 x 98

= 39.2