Question

Scrieti-mi cum aflu:
Md(masa dizolvantului
Ms(masa solventului)
Mapa(masa apei)
Ms minus Mapa=?

exemplu : C(concentratia procentuala)
C=Md supra Ms ori 100

Answer 1

[tex]\it c = \dfrac{m_d}{m_s}\cdot 100 \Longrightarrow \begin{cases} m_d = \dfrac{c\cdot m_s}{100} \\\;\\ \\\;\\ m_s = \dfrac{m_d}{c}\cdot100\end{cases}[/tex]

$\it m_s = m_{apa } + m_d \Longrightarrow m_{apa} = m_s - m_d$