Sue has to find the empirical formula of a compound containing 81.8 grams of carbon and 18.2 grams of hydrogen in 100 grams of compound. What should her first step be?

Which statement identifies the function of a cathode in every electrochemical cell? A. Electrons are lost from the cathode B. Reduction occurs at the cathode. C. Positive ions flow away from the cathode. D.

The composition of dry air at sea level is 78.03% N2, 20.99% O2, and 0.033% CO2 by volume. (a) calculate the average molar mass of this air sample (b) calculate the partial pressures of N2, O2, and CO2 in atm.

How can you describe the location of vanadium (v, atomic number 23) on the periodic table? Choose all that apply. period 5, group 4 period 4, group 5 nonmetals transition metals

What is the HONC 1234 rule

Which group, metals or nonmetals, has the greatest chance to gain electrons and to become negative ions?

Why does bromine not react with sulphur?

What happens to the size of the atom of anon-metal as it becomes an anion? A. it decreases B. it increases C. it remains the same D. it is impossible to tell unless you know the specific element

How is oxygen and nitrogen alike

Does a gas discharge tube filled with boron emit the same wavelength

a certain solution has a molarity of m = 6.39 mol/l and has a volume of v = 0.550 l what is the value of n