Please help An unknown compound has a percent composition of 52.12% oxygen, 8.75% hydrogen, and the rest carbon. The molar mass is 92.11 g/mol. a) Find the empirical formula b) Find the molecular formula.

What is the work done by the electric force to move a 1 c charge from a to b?

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.

The velocity of any object depends upon a) the location of the object. b) the location of the observer. c) which measurement tools are used. d) the relative motion of the observer.