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प्रश्न
What name is given to the amount of substance containing 6.022 × 1023 particles(atoms,molecules or ions) of a substance ?
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उत्तर
The name given to the amount of substance containing 6.022 × 1023 particles is 1 mole.
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संबंधित प्रश्न
One of the following elements has an atomicity of ‘one’. This element is :
How many atoms are there in 0.25 mole of hydrogen ?
Explain the term:
Gram mole
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
What mass of ammonium nitrate should be heated to produce 8.96L of steam?
Define or explain the term:
Relative atomic mass
Calculate the number of atoms in the following:
52 moles of He
Determine the number of molecules in a drop of water which weighs 0.09 g.
Match the following.
| 1. | 8 g of O2 | - | 4 moles |
| 2. | 4 g of H2 | - | 0.25 moles |
| 3. | 52 g of He | - | 2 moles |
| 4. | 112 g of N2 | - | 0.5 moles |
| 5. | 35.5 g of Cl2 | - | 13 moles |
Calcium chloride when dissolved in water dissociates into its ions according to the following equation.
\[\ce{CaCl2} (aq) → {Ca^{2+} (aq) + 2{Cl}- (aq)}\]
Calculate the number of ions obtained from CaCl2 when 222 g of it is dissolved in water.
Deduce the number of molecules of the following compound in the given quantity.
90g water
