
Massas moleculares e molares
Quiz
•
Chemistry
•
10th Grade - Professional Development
•
Practice Problem
•
Medium
Bruna Fontanella
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17 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
A massa molecular do hidróxido de sódio é
40 u
60 u
20 u
50 u
2.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
O H₂SO₄ tem massa molecular igual a
98 u
110 u
88 u
94 u
3.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
O CuSO4 . 5H2O tem massa molecular
249 u
359 u
119 u
161 u
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Uma unidade de massa atômica (u) corresponde,
a ____ da massa do átomo isótopo mais
comum do elemento ______.
1/12 ; carbono
1 ; hidrogênio
1/6 ; cálcio
1/10 / enxofre
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
É a média ponderada de vários isótopos encontrados na natureza.
Massa atômica de um elemento
Massa atômica de um átomo
Massa molecular
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
É a massa de uma molécula expressa em u e indica quantas vezes a massa da molécula é maior que 1/12 da
massa do carbono 12.
Massa molecular
Massa atômica de um elemento
Massa atômica de um átomo
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Dos seguintes compostos, qual apresenta massa
molecular igual a 44?
H₂O
CO₂
SO₃
KOH
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