$$Cp = \frac{ms*100\%}{mr - ru}$$

mr − ru = ms + mrozp

$$ms = \frac{mr - ru*Cp}{100\%}$$

$$Cm = \frac{n}{Vr - ru}\lbrack\ \frac{\text{mol}}{\text{dm}^{3}}\rbrack$$

n = C_M * V_r − ru

$$V_{r - ru} = \frac{n}{C_{M}}$$

$$n = \frac{\text{ms}}{\text{Mmol}}$$

$$n = \frac{N}{N_{A}}$$

$$n = \ \frac{V}{V_{m}}$$

$$dr - ru = \frac{m_{r - ru}}{V_{r - ru}}$$

m_r − ru = V_r − ru * d_r − ru

$$V_{r - ru} = \frac{m_{r - ru}}{d_{r - ru}}$$