Odparowano180g roztworu i otrzymano 20 g soli . Jakie było stężenie roztworu ?
200g (180g + 20g) - 100%
200g : 100 = 2g
2g - 1%
20g - 10%
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200g (180g + 20g) - 100%
200g : 100 = 2g
2g - 1%
20g - 10%