The concentration of a solution is 4 mg/mL. What is this concentration in g/L?

A solution has 5 g of salt in 200 mL of water. What is the percentage concentration (w/v)?

50 mL of ethanol is mixed into 450 mL of water. What is the percentage concentration (v/v)?

A sample contains 0.003 g of a compound in 2 L of water. What is the concentration in ppm?

How many grams of solute are needed to prepare 1 L of a 5% (w/v) solution?

Calculate the molarity if 29 g of NaCl (M = 58.5 g/mol) is dissolved in 500 mL of solution.

How many grams of CaCl₂ are needed to make 250 mL of a 0.4 M solution? (Molar mass = 111 g/mol)

How much water should be added to 100 mL of a 2 M solution to make it 0.5 M?

If a solution has a concentration of 10 mg/L, what is its concentration in ppm?

How many mg of solute are in 1.5 L of a 200 ppm solution?

How many moles of H₂SO₄ are in 250 mL of a 0.5 M solution?

If 0.2 g of solute is in 50 mL of solution, what is the % concentration (w/v)?

How many moles of KOH are required to prepare 500 mL of a 2 M solution?

Calculate the number of moles in 106 g of sodium carbonate (Na₂CO₃). Use the atomic standard weights: Na = 22.99, C = 12.01, O = 16.00.

How many moles are in 250 g of calcium carbonate (CaCO₃)? Use the atomic standard weights: Ca = 40.08, C = 12.01, O = 16.00.

Find the mass of 2 moles of water (H₂O). Use the atomic standard weights: H = 1.008, O = 16.00.

How many moles are in 234 g of aluminum hydroxide (Al(OH)₃)? Use the atomic standard weights: Al = 26.98, O = 16.00, H = 1.008.