Which of the following is a combustion reaction? select one: a. methane + oxygen -> carbon dioxide + water b. zinc + copper chloride -> zinc chloride + copper c. hydrochloric acid + sodium hydroxide -> sodium chloride + water d. sodium + chlorine -> sodium chloride

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?