In: Chemistry
A chemist adds 225.0 mL of a 8.0x10-5 mmol/L solution of silver (II) oxide solution to a reaction flask. Calculate the mass of micrograms in silver (II) oxide the chemist has added to the flask..Please answer using two significant figures.
AgO miili moles = M x V ( in L) where V = 225 ml = 0.225 L
= ( 8 x 10^ -5) mmol/L x (0.225 L)
= 1.8 x 10^ -5
AgO moles = milli moles x 10^ -3 = 1.8 x 10^ -5 x 10^ -3 = 1.8 x 10^ -8
AgO mass = moles x molar mass of AgO
= 1.8 x 10^ -8 mol x 123.9 g/mol
= 2.2 x 10^ -6 g
= 2.2 ug ( since 1ug = 10^ -6g)
hence silver (II) oxide mass is 2.2 micrograms