A common liquid contains 11.19% hydrogen and 88.81% oxygen by mass.
a) Calculate the number of moles of hydro-
gen atoms and oxygen atoms in 100.0 g of
this liquid
b) Calculate the number of hydrogen and
oxygen atoms in 100.0 g of this liquid.
c) Knowing that the molar mass of this liquid is
18.00 g. mol', calculate how many moles of
hydrogen atoms, and how many moles of
oxygen atoms are present in a mole of this
substance.
d) What is the number of hydrogen and oxy-
gen atoms present in one molecule of this
substance. Deduce the molecular mass of
this liquid and write its molecular formula.
Guys I know its a big question but I really am confused I don't understand I really hope u help me thankk youu

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .