10 mL of 0.1 M extNa2 extSO4 is mixed with 10 mL of 0.2 M NaCl solution. If final solution has density 1 gm/mL. Then molarity of extNa^+ is:

Here are the solutions for questions 146 to 156.

Question 146:
10 mL of 0.1 M $\text{Na}_{2}\text{SO}_{4}$ is mixed with 10 mL of 0.2 M NaCl solution. If final solution has density 1 gm/mL. Then molarity of $\text{Na}^{+}$ is:

Step 1: Calculate moles of $\text{Na}^{+}$ from $\text{Na}_{2}\text{SO}_{4}$.
Volume of $\text{Na}_{2}\text{SO}_{4} = 10 \text{ mL} = 0.010 \text{ L}$
Moles of $\text{Na}{2}SO{