Respostas

2014-07-16T14:38:08-03:00
350g -------------- 1 L
x -----------------0,75L

350g*0,75L = 1L * x
262,5g*L / 1 L = x

x = 262,5g de NaCl
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  • Usuário do Brainly
2014-07-16T14:51:30-03:00
C (concentração comum) =  350 g/L
m₁ (massa) = ?
V (volume) = 0,75 L

C = m₁/V
350 = m₁/0,75
m₁ = 262,5 g