The Math of Chemistry (A to Z) GENERAL

Front

What is the average atomic mass of an element?

Back

The average atomic mass is the weighted average of the masses of an element's isotopes, taking into account their relative abundances.

Front

How do you calculate the partial pressure of a gas in a mixture?

Back

The partial pressure of a gas can be calculated using Dalton's Law: Partial Pressure = (Mole Fraction of the Gas) x (Total Pressure of the Mixture).

Front

What happens to the volume of a gas when the temperature decreases?

Back

According to Charles's Law, the volume of a gas decreases as the temperature decreases, assuming pressure remains constant.

Front

How many electrons does a potassium +1 ion have?

Back

A potassium +1 ion has 18 electrons, as it loses one electron from its neutral state of 19 electrons.

Front

What is specific heat?

Back

Specific heat is the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius.

Front

How do you calculate average atomic mass from isotopic composition?

Back

Average Atomic Mass = (Fraction of Isotope 1 x Mass of Isotope 1) + (Fraction of Isotope 2 x Mass of Isotope 2).

Front

What is the relationship between pressure and volume of a gas at constant temperature?

Back

According to Boyle's Law, the pressure of a gas is inversely proportional to its volume at constant temperature.

Front

What is the formula for calculating heat energy?

Back

Heat Energy (Q) = mass (m) x specific heat (c) x change in temperature (ΔT).

Front

What is the significance of the ideal gas law?

Back

The ideal gas law (PV=nRT) relates the pressure, volume, temperature, and number of moles of an ideal gas.

Front

What is the concept of mole fraction?

Back

Mole fraction is the ratio of the number of moles of a component to the total number of moles in the mixture.