Question

m = \frac{26.18\\ mol\\ nacl}{990.1\\ l\\ sol^n}

Explanation:

Step1: Identify the formula for molarity (M)

Molarity \( M \) is defined as moles of solute per liter of solution, so \( M=\frac{\text{moles of solute}}{\text{liters of solution}} \). Here, moles of \( \text{NaCl} = 26.18\space\text{mol} \) and volume of solution \( = 990.1\space\text{L} \).

Step2: Perform the division

Calculate \( \frac{26.18}{990.1} \). Using a calculator, \( 26.18\div990.1\approx0.02644 \).

Answer:

The molarity \( M \) is approximately \( 0.02644\space\text{mol/L} \) (or \( 0.02644\space M \)).