
Revisão 1 ano
Authored by ANDREIA CHRISTINA IGNACIO
Chemistry
10th Grade
Used 8+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Das equações abaixo, qual(is) está(ão) corretamente balanceada(s)?
I. H2 + O2 → H2O II. NaOH + HCl → NaCl + H2O
Somente I.
Somente II.
I e II.
Nenhuma está correta.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A reação química para obter o metal ferro a partir da bauxita é a seguinte:
____Fe₂O₃ → ____Fe + ____O₂
Os coeficientes que equilibram corretamente a reação são, respectivamente:
2, 4 e 2.
2, 4 e 3.
1, 2 e 3.
2, 2 e 2.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O óxido de alumínio é usado como antiácido. Sabendo que a reação que ocorre no estômago é:
1Al₂O₃ + 6 HCl → 2 AlCl₃ + 3 H₂O
A massa deste óxido que reage com 12 mol de ácido será: Dado: Al₂O₃ = 102 u.
102 g
51 g.
204 g
20 g
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual a massa de 1 mol de CO2? Dados: C = 12; O = 16.
44 g
28 g
40 g
56 g
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual a massa de 1 mol de água? Dados H = 1; O = 16
16
18
34
32
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual o volume ocupado por 1 mol de qualquer gás nas CNTP?
22,4 L
44,8 L
62,7 L
depende do gás
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quantas moléculas existem em 1 mol de H2O?
3
22,4
6,02 x 1023
1
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