The student used a solution of sodium hydroxide of concentration 4.00 g/dm³. Calculate the mass of sodium hydroxide in 25.0 cm³ of this solution. (1 dm³ = 1000 cm³)

The relationship between mass, concentration, and volume is given by the formula:\nConcentration = Mass / Volume\n\nWe need to find the mass, so we rearrange the formula:\nMass = Concentration × Volume\n\nFirst, we must ensure the units are consistent. The concentration is in g/dm³, so the volume must be in dm³.\nVolume in dm³ = 25.0 cm³ ÷ 1000 = 0.0250 dm³\n\nNow, we can calculate the mass:\nMass = 4.00 g/dm³ × 0.0250 dm³\nMass = 0.100 g