Explicație:
[tex]c = \frac{md}{ms} \times 100[/tex]
1.
[tex]c = \frac{36}{600} \times 100 = 6[/tex]
=> c%=6%
2.
[tex]c = \frac{25}{125} \times 100 = 20[/tex]
=> c%=20%
3.
[tex]c = \frac{12}{12 + 36} \times 100 = \frac{12}{48} \times 100 = 25[/tex]
=>c%=25%
4.
[tex]c = \frac{80}{80 + 720} \times 100 = \frac{80}{800} \times 100 = 10[/tex]
=>c%=10%
5.
[tex]ms = \frac{md \times 100}{c} = \frac{42 \times 100}{6} = 700 \: g[/tex]
6.
[tex]md = \frac{c \times ms}{100} = \frac{5 \times 360}{100} = 18 \: g[/tex]
7.
[tex]ms = \frac{md \times 100}{c} = \frac{45 \times 100}{9} = 500 \: g[/tex]
m apă= ms-md=500-45=455 g
8.
[tex]md = \frac{ms \times c}{100} = \frac{700 \times 20}{100} = 140 \: g[/tex]
m apă= ms-md= 700-140= 560 g
