calculate the molarity of each of the following solutions. use the periodic table if necessary. a salt…

calculate the molarity of each of the following solutions. use the periodic table if necessary. a salt solution with a volume of 250 ml that contains 0.70 mol nacl. 2.8 m complete a salt solution that contains 0.90 g of nacl in 100.0 ml of solution. m done

calculate the molarity of each of the following solutions. use the periodic table if necessary. a salt solution with a volume of 250 ml that contains 0.70 mol nacl. 2.8 m complete a salt solution that contains 0.90 g of nacl in 100.0 ml of solution. m done

Answer

Answer:

$0.154$ M

Explanation:

Step1: Calculate molar mass of NaCl

The molar mass of Na ($22.99\ g/mol$) and Cl ($35.45\ g/mol$), so $M_{NaCl}=22.99 + 35.45=58.44\ g/mol$.

Step2: Calculate moles of NaCl

Given mass of NaCl is $m = 0.90\ g$. Using $n=\frac{m}{M}$, we have $n=\frac{0.90\ g}{58.44\ g/mol}\approx0.0154\ mol$.

Step3: Convert volume to liters

Volume $V = 100.0\ mL=0.1000\ L$.

Step4: Calculate molarity

Using the formula $M=\frac{n}{V}$, we get $M=\frac{0.0154\ mol}{0.1000\ L}=0.154\ M$.