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In 800g de apa se dizolva 100g sare de bucatarie. Ce cantitate procentuala va avea solutia? URGEEEEEEENT

Răspuns :

m.apa = 800g, md = 100g

ms = md+m.apa = 800+100 = 900g

stim ca c% = mdx100/ms

=> c% = 100x100/900 = 11,11%