V₁P₁ = V₂P₂

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

V₁/T₁ = V₂/T₂

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

P₁V₁/T₁ = P₂V₂/T₂

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

P₁/T₁ = P₂/T₂

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

PV = nRT

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

If it is at constant pressure?

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

If it is at constant temperature?

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

If it is at constant volume?

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

If you know moles?

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

If you change pressure, volume, and temperature?

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

At constant temperature, the volume of the gas varies inversely with pressure.

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

At constant pressure, the volume of a gas is directly proportional to the temperature.

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

At a constant volume, the pressure of a gas is directly proportional to the temperature.

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law

This law is a combination of Boyles' Law, Charles' Law, and Gay Lussac's Law.

1.   ?    Boyle's Law
2.   ?    Charles' Law
3.   ?    Combined Gas Law
4.   ?    Gay Lussac's Law
5.   ?    Ideal Gas Law