Arocket can fly into space because ?

a. when it is launched, the hot exhaust gases hit the ground and push the rocket forward.

b. the rocket pushes the exhaust gases backward, and there is an equal and opposite reaction pushing the rocket forward.

c. when the gases are burning up, the mass of the rocket decreases, changing the amount of gravity on the rocket.

d. the launch pad pushes the rocket forward like a slingshot.

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?