HELP ASAP PLS When the equation:

is correctly balanced using the smallest whole numbers, the coefficient of Al (s) is
1) 1
2) 2. 3) 3
4) 4

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 .

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

What state of matter is ice a. liquid b. element c. solid d. gas