Advertisements
Advertisements
प्रश्न
The molecular formula for elemental sulphur is S8. In a sample of 5.12 g of sulphur:
How many moles of sulphur are present?
Advertisements
उत्तर
1 molecule of sulphur S8 = [32 x 8] = 256 g
Moles of (S8) in 256 g = 1
∴ Moles of (S8) in 5.12 g = `1/256 xx 5.12`
= 0.02
APPEARS IN
संबंधित प्रश्न
Calculate the percentage of water of crystallization in CuSO4.5H2O
(H = 1, O = 16, S = 32, Cu = 64)
Fill in the following blanks :
60 g of carbon element are .............. moles of carbon atoms.
How many moles of oxygen atoms are present in one mole of the following compounds ?
- Al2O3
- CO2
- Cl2O7
- H2SO4
- Al2(SO4)3
Deduce the number of molecules of the following compound in the given quantity.
32g oxygen
The equation for the burning of octane is:
\[\ce{2C8H18 + 25O2 -> 16CO2 + 18H2O}\]
How many moles of carbon dioxide are produced when one mole of octane burns?
Correct the following statement :
Equal masses of all gases under identical conditions contain the same number of molecules.
Which of the following would weight the least?
[Atomic masses : Ag = 108, N - 14, O = 16,C = 12]
Calculate the number of atoms in the following:
52 moles of He
Correct the statement, if required.
Under the same conditions of temperature and pressure, equal volumes of all gases contain the same number of atoms.
N2 + 3H2 → 2NH3
(The atomic mass of nitrogen is 14, and that of hydrogen is 1)
1 mole of nitrogen (______ g) +
3 moles of hydrogen (______ g) →
2 moles of ammonia (______ g)
