Advertisements
Advertisements
Question
What is meant by ‘a mole of carbon atoms’ ?
Advertisements
Solution
A mole can be defined as the amount of a pure substance containing the same number of atoms, molecules or ions as present in exactly 12g of carbon. This refers to the value of 6.022 × 1023 atoms, molecules or ions of a substance.
Therefore, a mole of carbon atoms refers to a group of 6.022 × 1023 carbon atoms.
APPEARS IN
RELATED QUESTIONS
A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure
1) Find the number of moles of hydrogen present.
2) What weight of CO2 can the cylinder hold under similar conditions of temperature and pressure? (H = 1, C = 12, O = 16)
3) If the number of molecules of hydrogen in the cylinder is X, calculate the number of CO2 molecules in the cylinder under the same conditions of temperature and pressure.
4) State the law that helped you to arrive at the above result.
What name is given to the amount of substance containing this number of atoms ?
Explain the term:
Gram mole
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
What volume of dinitrogen oxide is produced at the same time as 8.96 L of steam?
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
Determine the percentage of oxygen in the ammonium nitrate?
Explain the term:
Molar volume
Define the term:
Relative molecular mass
Find the number of moles in 10 g of CaCO3.
The molecular formula for elemental sulphur is S8. In a sample of 5.12 g of sulphur:
How many moles of sulphur are present?
If phosphorus is considered to contain P4 molecules, then calculate the number of moles in 100g of phosphorus?
