Advertisements
Advertisements
प्रश्न
Deduce the number of molecules of the following compound in the given quantity.
7.1 g chlorine
Advertisements
उत्तर
No. of moles in chlorine = `"Mass of chlorine in grams"/"Molecular mass of chlorine"`
= `7.1/71`
= 0.1 mole
∴ 0.1 moles of Cl2 contains = 0.1 × 6.022 × 1023 molecules
= 0.6022 × 1023 molecules
∴ The number of molecules in 7.1 grams of chlorine is 6.022 × 1023
APPEARS IN
संबंधित प्रश्न
What is the mass of 0.5 mole of water molecules?
Calculate the number of moles in 12g of oxygen gas.
If the aluminium salt of an anion X is Al2X3, what is the valency of X ? What will be the formula of the magnesium salt of X ?
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
The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
Explain the term:
Mole
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?
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.
What is the value of molar volume of a gas at S.T.P?
Calculate the number of moles of methane in 0.80 g of methane.
Calculate the mass of 0.1 mole of the following:
CaCl2
(Ca = 40, Na=23, Mg =24, S=32, C = 12, Cl = 35.5, O=16, H=1)
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 g of He
The molecular formula for elemental sulphur is S8.In a sample of 5.12 g of sulphur:
How many molecules and atoms are present?
Correct the statement, if required.
The relative atomic mass of an element is the number of times one molecule of an element is heavier than `1/12` the mass of an atom of C12.
Calculate the number of moles in 7g of nitrogen.
What is Molar volume of a gas?
Compute the difference in masses of 103 moles each of magnesium atoms and magnesium ions.
(Mass of an electron = 9.1×10–31 kg)
