Question

calculate the molarity of 4g of Noah dissolved in water to form 500ml of the solution

Answer 1

Hey mate !!

Here's the answer !!

Molarity = Number of moles / Amount of solution ( In litres )

NaOH molar mass = 23 + 16 + 1 = 40 g

=> Number of moles in 4 g = 4 g / 40 g = 0.1 mole

Amount of water = 0.5 litres

Molarity = 0.1 Mole / 0.5 Litres

=> Molarity = 0.2 M

Hope my answer helps !!