Question

como calculo a massa molecular das seguintes substancias H2SO4 , H4P2O7 , AI2(SO4)3 e Ca3{Fe(CN)6]2

Answer 1

Olá!

a) $H_2SO_4$
$H\to 2 * 1 = 2 \\ S \to 1 * 32 = 32 \\ O \to 4 * 16 = 64$

Massa molecular: $2+32+64 = 98g/mol$

b) $H_4P_2O_7$
$H \to 4*1 = 4 \\ P\to 2 * 31 = 62 \\ O \to 7 * 16 = 112$

Massa molecular: $4 + 62 + 112 = 178g/mol$

c) $Al_2(SO_4)_3$
$Al \to 2 * 27 =54 \\ S \to 3 * 32 = 96 \\ O \to 12 *16 = 192$

Massa molecular: $54+96+192 = 342 g/mol$

d) $Ca_3[Fe(Cn)_6]_2$
$Ca \to 3*40 = 120 \\ Fe\to 2 * 56 = 112 \\ C\to 12 * 12=144 \\ N \to 12 * 14 =168$

Massa molecular: $120+112+144+168 = 544g/mol$