Which statement is true of metals? select one: a. they have characteristics of both metals and nonmetals. b. many are gases at room temperature. c. they have low conductivity. d. there are more metals than nonmetals.

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?

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5

How many grams are in 1.75 mile of carbon