The mole is related to the mass of an element in the following way: one mole of carbon-12 atoms has 6.02214076 × 1023 atoms and a mass of 12 grams. In comparison, one mole of oxygen consists, by definition, of the same number of atoms as carbon-12, but it has a mass of 15.999 grams.
What is the relationship between moles and volume?
A plot of the effect of temperature on the volume of a gas at constant pressure shows that the volume of a gas is directly proportional to the number of moles of that gas. This is stated as Avogadro’s law.
What is a mole and how does it relate to molar mass?
A mole is 6.02⋅1023 (avogadro’s number) molecules of a substance. The molar mass is the amount of mass that 1 mole of that substance possesses.
Avogadro’s law states that “equal volumes of all gases, at the same temperature and pressure, have the same number of molecules.” For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.
In chemistry and related fields, the molar volume, symbol Vm, or of a substance is the volume occupied by one mole of it at a given temperature and pressure. It is equal to the molar mass (M) divided by the mass density (ρ): Molar volume of atoms is often taken as the atomic volume.
Do moles increase with volume?
According to Avogadro’s law, as the number of moles of gas increases the volume also increases.
Does mole change with volume?
Explanation: But volume does not affect the number of moles…… The number of moles is usually an independent variable.
Chemists generally use the mole as the unit for the number of atoms or molecules of a material. One mole (abbreviated mol) is equal to 6.022×1023 molecular entities (Avogadro’s number), and each element has a different molar mass depending on the weight of 6.022×1023 of its atoms (1 mole).
What is the relationship between mass and volume of a substance?
We can say that the volume of the object is directly proportional to its mass. As the volume increases the mass of the object increases in direct proportion.
How do you calculate volume from moles and molar volume?
Calculating the volume of a gas
- Volume = amount in mol × molar volume.
- Volume = 0.25 × 24.
- = 6 dm 3