Answer:
0.04 mol/ Liter
Explanation:
If you have 8.1 grams of NaOH in 5 L of solution, what is the molarity? (Round answers to the nearest hundredth)
The formula for molarity = Number of moles/ Volume in Liters
Step 1
Find the Number of moles of NaOH
We find the Molar mass of NaOH
Na = 23, O = 16, H = 1
Molar mass = 23 + 16 + 1 = 40 g/mol
Grams of NaOH in the solution = 8.1 grams
Number of moles = Mass/Molar mass
= 8.1 g/40 g/mol
= 0.2025 moles
Step 2
Molarity = 0.2025moles/ 5 L
= 0.0405 mol/ Liter
Approximately = 0.04 mol/L