Portland cement (J. Aspdin) contains maximum % of CaO. Cement clinker contains A) limestone & clay as raw materials

B) SiO2 to Al2O3 ratio 2.5 to 4.0 or

C) gypsum, fly ash and black ash (Na2CO3 + CaS)

D)

Determine the empirical formula of a compound containing 40.6 grams of carbon, 5.1 grams of hydrogen, and 54.2 grams of oxygen. in an experiment, the molar mass of the compound was determined to be 118.084 g/mol. what is the molecular formula of the compound? for both questions, show your work or explain how you determined the formulas by giving specific values used in calculations.

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form