A person's heartbeat is 66 beats per minute. If his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does the person live? Disregard leap years.

Which will be true for any actual or potential nucleophilic substitution reaction?

Ammonia nh3 and oxygen can be reacted together in the presence of a catalyst to form only nitrogen monoxide and water. if 2.67 mol of ammonia is reacted with excess oxygen, what mass of water would be produced?

By what factor does the rate change in each of the following cases (assuming constant temperature) ? (a) A reaction is first order in reactant A, and [A] is doubled. (b) A reaction is second order in reactant B, and [B] is halved.

The complete combustion of gaseous sucrose at a constant pressure absorbs 544 kj of heapt per mole of surcrose. write the balance thermochemical equation for the reaction

The decay of a radioactive isotope follows first-order kinetics. Iodine-131, used to treat cancer of the thyroid gland, has a half-life of days.

A 5.00 g mixture of methane (CH4) and ethane (C2H6) is combusted in oxygen gas to produce carbon dioxide and water. If 14.09 g of CO2 is produced, how many grams of methane was in the original 5.00 g mixture?

Which list of elements contains only metals? A. carbon, iodine, tin B. tin, copper, cesium C. helium, iron, copper D. iodine, carbon, argon

If you put Alka Seltzer in water and leave it for about one minute is the solution acidic, basic, or neutral?

Certain object has a mass of 60 g and a volume of 32.6 cm³ what type of objects is the density

How important is the resonance structure shown here to the overall structure of carbon dioxide? how important is the resonance structure shown here to the overall structure of carbon dioxide?