Advertisements
Advertisements
प्रश्न
Calculate the number of moles and number of molecules present in 1.4 g of ethylene gas. What is the volume occupied by the same amount of ethylene?
Advertisements
उत्तर
Molecular mass of ethylene (CH2-CH2) = 1.4 g
Number of moles = `"Mass"/"Molecular mass"`
= `1.4/28`
= 0.05 moles
Now, number of molecules in 1 mole = 6.023 × 1023
∴ Number of molecules in 0.05 moles = 6.023 x 1023 × 0.05
= 0.3 × 1023
= 3 × 1022 molecules
Volume occupied by 1 mole of ethylene = 22.4 L
∴ Volume occupied by 0.05 moles of ethylene = 22.4 × 0.05
= 1.12 L
संबंधित प्रश्न
Convert into mole.
22 g of carbon dioxide
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 is the mass of 0.2 mole of oxygen atoms ?
Show by means of calculations that 5 moles of CO2 and 5 moles of H2O do not have the same mass. How much is the difference in their masses ?
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.
How many grams of HCl are present in 0.1 mole of it?
Calculate the mass of 0.1 mole of the following:
Mg
(Ca = 40, Na = 23, Mg = 24, S = 32, C = 12, Cl = 35.5, O = 16, H = 1)
Calculate the number of atoms in the following:
52 moles of He
Calculate the number of gram atoms in 4.6 gram of sodium.
From the equation for burning of hydrogen and oxygen
\[\ce{2H2 + O2 -> 2H2O}\] (Steam)
Write down the number of mole (or moles) of steam obtained from 0.5 moles of oxygen.
