Advertisements
Advertisements
प्रश्न
Deduce the number of molecules of the following compound in the given quantity.
32g oxygen
Advertisements
उत्तर
Number of moles in O2 = `("Mass of O"_2 "in grams")/"Molecular mass of O"_2`
= `32/32`
= 1 mole
∴ 1 mole of O2 contains 6.022 × 1023 molecules.
∴ The number of molecules in 32 grams of oxygen is 6.022 × 1023.
APPEARS IN
संबंधित प्रश्न
Calculate the molar mass of the following substance:
Phosphorus molecule, P4 (atomic mass of phosphorus = 31)
What is the mass of 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?
What is the mass of 0.2 mole of oxygen atoms?
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.
Choose the correct answer from the options given below:
The ratio between the number of molecules in 2g of hydrogen and 32g of oxygen is:
[Given that H = 1, O = 16]
Calculate the number of moles in 12g of oxygen gas.
What name is given to the amount of substance containing 6.022 × 1023 particles(atoms,molecules or ions) of a substance ?
What name is given to the amount of substance containing this number of atoms ?
If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the mass of one atom of oxygen.
What is the mass of 5 moles of sodium carbonate (Na2CO3) ?
(Atomic masses : Na = 23 u ; C = 12 u ; O = 16 u)
If 0.2 mol of the following substance is required how many grams of that substance should be taken?
Sodium chloride
Explain the term:
Mole
Fill in the blank
One gram atom of an element contains ______ atoms.
A student puts his signature with graphite pencil. If the mass of carbon in the signature is 10-12 g. Calculate the number of carbon atoms in the signature.
Define the term:
Mole
Find the number of molecules in 1.8 g of H2O.
How many grams of Al are present in 0.2 mole of it?
Determine the number of molecules in a drop of water which weighs 0.09 g.
Correct the statement, if required.
Under the same conditions of temperature and pressure, equal volumes of all gases contain the same number of atoms.
1 mole of any substance contains ______ molecules.
