
Leis Ponderais
Authored by Gabriela Dalberto
Chemistry
10th Grade

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7 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
(D46) - Lei da Conservação de Massas de Lavoisier: se uma reação química for realizada em um sistema fechado, a soma das massas dos reagentes será sempre igual à soma das massas dos produtos.
Verdadeiro
Falso
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
(D46) - Observe a equação a seguir:
Sódio (46g) + Oxigênio (32g) = Peróxido de sódio
Qual será a quantidade de peróxido formado?
23
32
69
78
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
(D46) - Observe a equação a seguir:
100 g de calcário é colocada sob aquecimento e se decompõe em 56 g de cal viva e 44 g de gás carbônico. Essa afirmativa está baseada na lei de Lavoisier.
Verdadeiro
Falso
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2,1,1,e 1
2, 2, 2 e 1
2, 1, 1 e 2
1, 2, 2 e 1
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
(D46) - A reação a seguir encontra-se balanceada:
2K + Cl2 → 2KCl
Verdadeiro
Falso
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
(D46) - A reação a seguir encontra-se balanceada:
4 Fe + 3 O2 → 2 Fe2O3
Verdadeiro
Falso
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
(D46) - Dada a reação:
SO2 + NaOH → Na2SO3 + H2O
A sequência correta dos coeficientes dos reagentes e produtos necessários para o balanceamento estequiométrico dessa equação é:
1,2,1,1
1,2,1,2
1,1,1,1
2,2,1,1
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