Răspuns: [tex] \red{\boxed{\bf C = 5\% }} [/tex]
Explicație pas cu pas:
[tex] \bf \green{\boxed{\bf Formula: C = \frac{m_d}{m_s} \cdot 100}} [/tex]
[tex] \bf m_d = 180g \: de \: sare [/tex]
[tex] \bf m_s = m_d + m_{solventului} \Rightarrow m_s = 180g + 3420g \Rightarrow m_s = 3600g [/tex]
[tex] \bf C = \frac{m_d}{m_s} \cdot 100 \Rightarrow C = \frac{180}{36\not{00}} \cdot 1\not{00} \Rightarrow C = \frac{180}{36} \Rightarrow \red{\boxed{\bf C = 5\%}} [/tex]
