A0.167-g sample of an unknown compound contains 0.00278 mol of the compound. elemental analysis of the acid gives the following percentages by mass: 40.00% c; 6.71% h; 53.29% o.

What state of matter is ice a. liquid b. element c. solid d. gas

What is the volume of 2.5 moles of nitrogen gas (n2)at standard temperature and pressure (stp)?

A0.10 m aqueous solution of sodium sulfate is a better conductor of electricity than a 0.10 m aqueous solution of sodium chloride. which of the following best explains this observation? (a) sodium sulfate is more soluble in water than sodium chloride. (b) sodium sulfate has a higher molar mass than sodium chloride. (c) to prepare a given volume of 0.10 m solution, the mass of sodium sulfate needed is more than twice the mass of sodium chloride needed. (d) more moles of ions are present in a given volume of 0.10 m sodium sulfate than in the same volume of 0.10 m sodium chloride. (e) the degree of dissociation of sodium sulfate in solution is significantly greater than that of sodium chloride.