Calculate the mass of 0.10M NAHCO3 in 500cm3.(NAHCO3=84)
First, calculate the number of moles of NAHCO3 in 500 cm3 of a 0.10M solution:
Molarity = moles/volume
0.10 mol/L = moles/0.500 L
moles = 0.10 mol/L x 0.500 L
moles = 0.05 moles
Next, calculate the mass of 0.05 moles of NAHCO3:
molar mass of NAHCO3 = 84 g/mol
mass = moles x molar mass
mass = 0.05 moles x 84 g/mol
mass = 4.2 grams
Therefore, the mass of 0.10M NAHCO3 in 500 cm3 is 4.2 grams.