Q2. Calculate mass concentration of a solution %(m/m), that was prepared from a compound mass of 6.2477 [g]. This mass was quantitatively dissolved in 80 ml of water (water density=1 g/ml).

Q3. Calculate the gravimetric factor GF of a metal M with a molar mass 67.63 g/mol determined in the form of a salt M2Y with a molar mass 802.51 g/mol. The gravimetric factor should have 4 decimal digits!

Q4. How many mL of 50% (m/m) NaOH are required to prepare 9.40 mL of 8.6 M solution? The 50% solution weighs 1535 g per liter.