Help With Chemistry Questions Plz!!!!!?

Question

1. A Compound has a molar mass of 86.0g/mol and empirical formula of C3H7. What is the molecular formula?

2. how many oranges are in a mole of oranges?

3. Why does the pressure inside a container of gas increase if more gas is added to the container?

a) nonesense! the pressure doesn't increase if gas is added. b) there is a increase force of the collisions btw the molecules and the walls of the container. c) there is a corresponding increase in the number of molecules striking the walls of the container per unit.

4. which of these changes would not cause an increase in the pressure of a gas? a) the temperature of the gas is increased b) the container c) more of the gas is added to the container.

5. If a capped syringe which is in a warm room is plunged into cold water, in which way will the syringe piston slide? a) out b) in c) Nothing will happen?

6. Accroding to kinetic theory:

a) the particles are far apart b) the particles exhibt no attraction to or repulsion for each other?

Answer 1

1. C6H14

2. 6.02 x 10^23

3. c

4. b.

5. b

6. If the gas is ideal, both are true.  In reality, Van der Waal's forces and induced dipoles will cause very slight attraction between molecules.

Answer 2

2.) there are 6.023 X 10^23 oranges in a mole of oranges