For the equation caco3 (s) + 2hcl (aq) → cacl2 (s) + h2 (aq) + h2o (l), 100.00 g of caco3 pellets are combined with 250 ml of hcl of a 2.0 m solution. which of the following will increase the rate of the chemical reaction?

a. add heat to the reaction.

b. increase the concentration of hcl to 3.0 m.

c. crush the caco3 into powder.

d. all of the above

e. none of the above

Nitric oxide (no) can be formed from nitrogen, hydrogen and oxygen in two steps. in the first step, nitrogen and hydrogen react to form ammonia: n2(g) + 2 h_2(g) rightarrow 2 nh_3 (g) delta h = -92. kj in the second step, ammonia and oxygen react to form nitric oxide and water: 4 nh_3(g) + 5 o_2(g) rightarrow 4no(g) + 6 h_2o(g) delta h = -905. kj calculate the net change in enthalpy for the formation of one mole of nitric oxide from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

What is the number of atoms in 3.54 mol s

Do polar molecules have ionic bonds?