Idon't understand any of this. if you can answer by midnight this is due tomorrow, april 29th
1. for the reaction:

2so₂(g)+o₂(g) ⇄2so₃(g) +heat

which action will increase the concentration of so₃?

a-removing so₃

b- increasing the temperature

c- increasing the pressure

d-adding a catalyst

2. given the balanced equation the reaction :

p₄+50₂→p₄0₁₀

what mass of oxygen is needed to completely react with 7.75g p₄?

a-2.00g

b-5.00g

c-10.00g

d-40.00g

3. a 10.10 g sample pf barium chloride hydrate is heated in crucible. after all og the water is driven off, 8.50g of anhydrous barium chloride remains in the crucible. what is the formula of the hydrate? (short answer)

4. when a set amount of marble chips (caco₃) is added to a small amount of dilute hydrochloric acid , a reaction occurs. what should be done to decrease the rate of reaction the next time the experiment is done.?

a- use more acid

b- stir

c- use larger marble chips

d- add heat

5. a student experimented with magnesium ribbon and hydrochloric acid.

-the student placed a piece of solid magnesium ribbon in a test tube containing hydrochloric acid solution

-the student observed that vigorous bubbling occurred

-the student collected some of the gas generted by the bubbles in a test tube.

-the student tested the gas produced with a burning wood split which ignited quickly with a popping sound.

which of the following can the student conclude on the experiment?

a- co2 was produced

b- oxygen gas was produced

c- the experiment failed

d-hydrogen gas was produced