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JuXlamou3
@JuXlamou3
January 2020
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Determine a massa de Na2CO3 que deve ser dissolvida em água para obter 1,5 L de solução 2,0 mol/L (MA: Na=23, C=12, O=16) ?
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WillQuimica
Verified answer
Massa molar Na2CO3 = 23 x 2 + 12 + 16 x 3 => 106 g/mol
Cálculo do número de mols do soluto:
1 L ---------- 2,0 mol
1,5 L --------- n
n = 1,5 . 2,0
n = 3,0 mols
Por fim:
1 mol Na2CO3 ------------ 106 g
3,0 mols Na2CO3 -------- m
m = 3,0 . 106
m = 318 g
Att ...
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Verified answer
Massa molar Na2CO3 = 23 x 2 + 12 + 16 x 3 => 106 g/molCálculo do número de mols do soluto:
1 L ---------- 2,0 mol
1,5 L --------- n
n = 1,5 . 2,0
n = 3,0 mols
Por fim:
1 mol Na2CO3 ------------ 106 g
3,0 mols Na2CO3 -------- m
m = 3,0 . 106
m = 318 g
Att ...