
RCV 1º ano Química
Authored by Rosangela Lopes
Chemistry
1st Grade
Used 2+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Quantas moléculas de butano (C4H10) existem num isqueiro contendo 5,8 g desta substância? (Número de Avogadro: 6,0.1023 moléculas em um mol)
3.1023 moléculas
1,3.1026 moléculas
6.1022 moléculas
2.1021 moléculas
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Propano (C3H6) é um dos componentes do gás de cozinha. A mistura é denominada de GLP (gás liquefeito de petróleo) , sua molar é:
C =12u ; H = 1u
60g/mol
48g/mol
36g/mol
42g/mol
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
(PUC-RS) Assim como uma dezena indica 10 objetos, um mol indica:
62,02.10-23 objetos
3,02.1023 objetos
6,02.1023 objetos
0,602.1023 objetos
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
(FAC. OBJETIVO-SP) Qual o número de átomos em 3,4 g de amônia (NH3)? Dados: N = 14; H = 1 e constante de Avogadro = 6.1023
32.1028
1,2.1023
5,2.1020
3,2.1019
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A massa molar do ácido etanóico (C2H4O2) é:
C = 12; O = 16; H = 1
60g/mol
59g/mol
98g/mol
65g/mol
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Qual a massa molar da sacarose ( C12H22O11)
C = 12u ; H = 1u ; O + 16 u
267g/mol
148g/mol
342g/mol
670g/mol
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A opção que contém apenas bases é:
CO, Al2O3, Pb3O4
HCℓ, H2SO4, HNO3
NaCℓ, KNO3, Na2S
NaOH, Ca(OH)2, NH4OH
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