Potassium reacts with water to form hydrogen gas. Potassium's ability to react can be classified as a
A. physical property of matter
B. chemical property of matter
C. physical change
D. chemical change

Can someone me with 6 to 10 plz this is for masteries test.

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2

How do you determine the percent yield of a chemical reaction