Question

Rezolvati cu,cunostintele de clasa a 7a va rog mult

Answer 1

Răspuns:

m apă vaporizată=133,34g

Explicație:

Salutare! ʕ•ᴥ•ʔ

$m_{s1}=200g$

$c_1=15\%$

$c_2=3 \times c_1=3 \times 15\% = 45\%$

$m_{apa \: vaporizata} =?$

$m_{d1}=\frac{c_1 \times m_{s1}} {100}$

$m_{d1} =m_{d2}$

$m_{s2}=\frac {m_{d2} \times 100}{c_2}$

$m_{apa \: vaporizata}=m_{s1}-m_{s2}$

$m_{d1} =\frac {15 \times 200g}{100}=30g$

$m_{d1} =m_{d2} =30g$

$m_{s2} =\frac {30g \times100} {45}=66,66g$

$m_{apa vaporizata} = 200g - 66,66g =133,34g$

Succes! (◕‿-)