
CONC. COMUM E MOLARIDADE
Chemistry
1st Grade
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5 questions
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1.
MULTIPLE CHOICE QUESTION
10 mins • 2 pts
(Concentração Comum) Qual a concentração comum (g/L) quando 8 gramas de hidróxido de cálcio são dissolvidos e completado volume de 250 mL ?
0,32 g/L
320 g/L
32 g/L
2 g/L
2.
MULTIPLE CHOICE QUESTION
10 mins • 2 pts
(Concentração Comum) Qual a concentração comum (g/L) de uma solução que contém 20 gramas do soluto dissolvido em 500 mL de solvente?
10000 g/L
10 g/L
0,04 g/L
40 g/L
3.
MULTIPLE CHOICE QUESTION
10 mins • 2 pts
(Concentração Comum) Um frasco de um produto informa o seguinte: Conc. Comum = 50 g/L e Volume = 300 mL. Sabendo disso, calcule a massa em gramas de soluto existem nessa solução?
15000 g
15 g
166,66 g
0,16 g
4.
MULTIPLE CHOICE QUESTION
10 mins • 2 pts
(Molaridade) Calcule a molaridade (mol/L) de uma solução que foi preparada dissolvendo-se 18 gramas de glicose em água suficientes para produzir 800 mL da solução. (Massa Molar da glicose = 180 g/mol)
0,125 mol/L
0,000125 mol/L
1,25 mol/L
12,5 mol/L
5.
MULTIPLE CHOICE QUESTION
10 mins • 2 pts
(Molaridade) Em cada 200mL de suco gástrico (HCl) produzidos no estomago existem 0,4 gramas deste ácido clorídrico. Qual é a molaridade (mol/L) do suco gástrico? (Massa Molar do HCl = 36,5 g/mol)
5 mol/L
0,5 mol/L
0,00005 mol/L
0,05 mol/L
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