Advertisements
Advertisements
प्रश्न
If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the mass of one atom of oxygen.
Advertisements
उत्तर
Given:
Mass of 1 mole of oxygen = 16g
We know that 1 mole of oxygen contains 6.022 × 1023 oxygen atoms.
Mass of 6.022 × 1023 oxygen atoms = 16g
Mass of 1 oxygen atom = 16/6.022 × 1023
Hence, 1 atom of oxygen molecule weighs 2.65 × 10-23 grams.
APPEARS IN
संबंधित प्रश्न
Calculate the molar mass of the following substance:
Sulphur molecule, S8
One of the following elements has an atomicity of ‘one’. This element is :
What is meant by ‘a mole of carbon atoms’ ?
Calculate the number of molecules in 12.8g of sulphur dioxide gas. Take Avogadro's number as 6 x 1023.
[S = 32, 0 = 16 ]
A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure.
(a) Find the number of moles of hydrogen present
(b) What weight of CO2can the cylinder hold under similar conditions of temperature and pressure? (H = 1 C = 12, O = 16)
(c) If the number of molecules of hydrogen in the cylinder is X, calculate the number of CO2 molecules in the cylinder with the same conditions of temperature and pressure.
(d) State the law that helped you to arrive at the above result.
Define or explain the term:
Relative atomic mass
Cost of Sugar (C12H22 O11) is Rs 40 per kg; calculate its cost per mole.
Calculate the number of moles in 1.51 × 1023 molecules of NH4Cl.
The difference in the mass of 100 moles each of sodium atoms and sodium ions is 5.48002 g. Compute the mass of an electron.
Deduce the number of molecules of the following compound in the given quantity.
90g water
