What is the correct formula for copper(II) oxide?Group of answer choicesCuO2Cu2OCuO2CuO2CO2

What is the formula for copper (l) sulfide?Multiple choice question.Cu2SCuS2Co2SCuSO4

Which of the formulae below is the correct chemical formula for copper (I) cyanide?Group of answer choices(a)   CoCN(b)   Co2CN(c)   CuCN(d)   CuCN2(e)   Cu2CN

The correct formula for sodium oxide isGroup of answer choicesSO2Na2ONaO2S2O

[CuBr2(O = C(NH2)2)2]The most appropriate IUPAC name of the compound given above isDibromidobis(urea)copper(II)Tetrabromido bis (urea) copper (II)Dibromido bis (urea) cuprate (II)Dibromido bis (urease) copper (II)

The percent composition by mass of copper and oxygen in copper(I) oxide is determined to be  % copper and  % oxygen. Round your answers to two decimal places.M Cu = 63.55 g mol-1M O = 16.00 g mol-1