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प्रश्न
The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
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उत्तर
The relative atomic mass of Cl atom is 35.5 a.m.u. because chlorine consists of a mixture of two isotopes of masses 35 and 37 in the ratio of 3 : 1.
The average of the isotopic masses is 35 x 3 + 37 x 4 = 35.5
Concept Insight: Isotopes are atoms of same having same atomic number but different mass number.
संबंधित प्रश्न
A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure
1) Find the number of moles of hydrogen present.
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3) If the number of molecules of hydrogen in the cylinder is X, calculate the number of CO2 molecules in the cylinder under the same conditions of temperature and pressure.
4) State the law that helped you to arrive at the above result.
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Sodium chloride
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Correct the statement, if required.
Under the same conditions of temperature and pressure, equal volumes of all gases contain the same number of atoms.
What is Molar volume of a gas?
How many grams are there in the following?
3 moles of chlorine molecule, Cl2.
Fill in the missing data in the Table
| Species Property | H2O | CO2 | Na atom | MgCl2 |
| No. of moles | 2 | - | - | 0.5 |
| No. of particles | - | 3.011×1023 | - | - |
| Mass | 36g | - | 115 g | - |
