Advertisements
Advertisements
प्रश्न
If 0.2 mol of the following substance is required how many grams of that substance should be taken?
Calcium carbonate
Advertisements
उत्तर
Molar mass of CaCO3 = 40 + 12 + 3(16) = 100 g/mol
Number of moles of a substance = `"Mass of the substance in grams"/"Molecular mass of the substance"`
Let Mass of the substance in grams be x,
`0.2 = "x"/100 = 20`g
we need, 20 g of CaCO3 for obtaining 0.2 moles of CaCO3.
APPEARS IN
संबंधित प्रश्न
Convert into mole.
12 g of oxygen gas
The percentage composition of a gas is Nitrogen 82.35%, Hydrogen 17.64%. Find the empirical formula of the gas. [N = 14, H = 1]
What name is given to the amount of substance containing 6.022 × 1023 particles(atoms,molecules or ions) of a substance ?
Fill in the following blanks :
60 g of carbon element are .............. moles of carbon atoms.
How many moles are there in 34.5 g of sodium ? (Atomic mass of Na = 23 u)
If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the mass of one atom of oxygen.
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 ?
The ratio of moles of atoms in 12 g of magnesium and 16 g of sulphur will be :
Explain the term:
Mole
Fill in the blank
One gram atom of an element contains ______ atoms.
Fill in the blank
Avogadro's number is equal to ______
Explain the term:
Molar volume
How many grams of Al are present in 0.2 mole of it?
The number of molecules in 4.25 g of ammonia is ______.
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.
1 mole of any substance contains ______ molecules.
One mole of any gas occupies ______ ml at S.T.P.
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.
7.1 g chlorine
