1. Calculate the % (m/m.)of Oxygen gadina miture containing 25.0 3 of Oxigin gas ard 80.0…

1. Calculate the % (m/m.)of Oxygen gadina miture containing 25.0 3 of Oxigin gas ard 80.0 g of nitroyr goo. 2. A 1.oo- Sample of stream watur wos faand to contain า,’7×10-cg lead calcul ate the concentration of lead n the Sream water 1n Units of % (m/m),PP+,Sppm? which is me aswirs in Seiente notaian. mostutale unit Entur your 3.Calculete h mber ot equivalent/ oe cana Solution that s 4.3×0-z Expriss your answer in Scianht notation M in Ca