Question

help nessas questoes plss

Answer 1

Questão 5
NaCl - 23 + 35,45 = 58,45g

23g --- 58,45
200g -- x
x = 508,26g

Aproximadamente letra E.

Questão 6
A) 1 mol -- 6 x 10²³
x mols ---- 2 x 10²⁰
x = 3,33 x 10⁻⁴

1 mol --- 197g
3,33 x 10⁻⁴ mols -- x
x = 0,065g de Au

1g de Au ----------------- R$ 17,00
0,065g de Au --------------X
x = R$ 1,11

Letra B
197g --- 6 . 10²³
x --------- 2. 10²⁰
x = 0,066g

1 g --- 17
0,066g - x
x = R$1,12

2.10²° --- x
6.10²³ - 370KJ
X = 0,12KJ