Chemistry homework help plzzz help me?

For each answer explain a little why plz...

1) Which metal reacts most vigorously with water?

A) Al

B) Cs

C) Sr

D) Ba

Which gas dissolves in water to produce a solution that turns phenolphthalein pink?

A) CH4

B) H2S

C) NO2

D) NH3

3) which lead salt is most soluble in water?

A) Pb(C2H3O2)2

B) PbO2

C) PbCO3

D) Pb3(PO4)2

4) which metal reacts witty concentrated NaOH to produce a hydrogen gas?

A) Al

B) Cu

C) Fe

D) Mg

5) which pf the following substances would NOT be expected to react with 1M HCl?

A) CaO

B) SO2

C) MnO2

D) K2CO3

6) when 1.187 g of a metallic oxide reduced with excess hydrogen, 1.054 of the metal is produced. What is the metallic oxide?

A) AgO2

B) K2O

C) Cu2O

D) Tl2O

7) At the same temperature and pressure, samples oxygen and carbon dioxide gas with equal masses...

A) contain the same number of molecules

B) occupy equal volumes

C) possess molecules with the same average velocity

D) have molecules with the same average kinetic energy

Real gases are most likely to deviate from ideal behavior at conditions of...

A) low temperature and low pressure

B)low temperature and high pressure

C)high temperature and high pressure

D) high temperature and low pressure