chemistry... having a hard time please help!!!?

A simple dissociation reaction is written for the following acids Which one is least correct

Hydrochloric acid HCl(aq)->H+(aq)+Cl-(aq)

The ammonium ion NH4+(aq)->H+(aq)+NH3(aq)

Acetic acid HC2H3O2(aq)-->H+(aq)+C2H3O2-(aq)

The hydrated aluminum (III) ion Al(H2O)36+(aq)-->H+(aq)+Al(H2O)5OH2+(aq)

Which of the following steps illustrates work being done?

A beaker of water being heated from 25°C to 75°C.

A battery producing 1.5 V.

A box being pushed up a ramp.

A log burning in a fireplace.

Which of the following has the highest number of Calories?

7.2 g of fat

9.8 g of starch

15.5 g of sugar

14.3 g protein

The rate equation for the synthesis of water

2H2 + O2 --> 2H2O is Rate = k[H2][O2]

What is the overall order of this reaction?

0

1

2

3

What is the [H3O+] in a solution with a pH of 2.34?

4.57 x 10–3 M

4.6 x 10–3 M

4.57 x 103 M

4.6 x 103 M

Please helphaving a hard time with these