Amarathon is a race that commemorates the run made by a greek soldier, pheidippides, that took place in august 490 bc. the soldier ran 26.2 mi. how many kilometers did he run? 24.6 km41.9 km16.4 km

a. 24.6
b.41.9
c.16.4

Calcium hydride (cah2) reacts with water to form hydrogen gas: cah2(s) + 2h2o(l) → ca(oh)2(aq) + 2h2(g) how many grams of cah2 are needed to generate 45.0 l of h2 gas at a pressure of 0.995 atm and a temperature of 32 °c?

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?