Question

1. what is the incorrect statement?

a. an ideal gas is a hypothetical gas that, in theory, obeys all of the gas laws.
b. the general gas law is used to predict the final conditions of a gas after its initial conditions have been changed.
c. the relationship between the four variables of a gas is established by the simple gas law
d. the symbols of the four variables that describe gases are p, v, t and n.

1. choose the false statement among the following.

a. the pressure of gases corresponds to the force they exert on a surface.
b. gravitational force helps the earth to retain the gases that compose the atmosphere around it.
c. normal atmospheric pressure can be represented by: 101.3 pa = 760 mm hg = 1 atm
d. light gases diffuse more quickly than heavy gases.

1. choose the false statement among the following.

a. hcl is an acid because it forms hydrogen ions $h^+$ when dissolved in water
b. naoh is a base because it forms hydroxide ions $oh^-$ when dissolved in water.
c. acetic acid ($ch_3cooh$) is a strong acid.
d. naoh is a strong base.

Explanation:

1. For question 1: Simple gas laws (Boyle's, Charles's, Gay-Lussac's) only relate 2 gas variables at a time. The general gas law (ideal gas law) links all four variables (P, V, T, n).
2. For question 2: Standard atmospheric pressure is 101325 Pa (or 101.3 kPa), not 101.3 Pa. The conversions to 760 mm Hg and 1 atm are correct, but the Pa value is wrong.
3. For question 3: Acetic acid (CH₃COOH) only partially dissociates in water, so it is a weak acid, not a strong acid. Strong acids fully dissociate in solution.

Answer:

1. c. The relationship between the four variables of a gas is established by the simple gas law
2. c. Normal atmospheric pressure can be represented by: 101.3 Pa = 760 mm Hg = 1 atm
3. c. Acetic acid (CH₃COOH) is a strong acid.