Apply Concepts Two chemists each plan an investigation in which they will combine hydrogen gas with chlorine gas to observe the chemical reactivity. The plans differ in that one will use 25 milligrams each of hydrogen and chlorine, and the other will use 1000 times this amount, i. E., 25 grams each of hydrogen and chlorine. Can the investigations reach similar conclusions about the reactivity of hydrogen with chlorine? Explain.

Yes

Explanation:

Chemical reactivity is a property of matter that does not depend on amount of each substance used.

If two substances can react with each other, they will always react together even at trace amounts. The only difference that will be observed when a larger concentration of reactants are used is that the rate of reaction is faster than in the presence of trace amounts.

Thus, similar conclusions about the reactivity of hydrogen with chlorine can be arrived at using both 25 milligrams each of hydrogen and chlorine, and  1000 times this amount of each reactant.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.