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प्रश्न
Define mole. What are the two things that a mole represents.
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उत्तर
Mole can be defined as, the amount of a pure substance, containing the same number of atoms, molecules or ions as present in 12g of carbon. This refers to the value of 6.022 × 1023 atoms, molecules or ions of a substance.
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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.
2) What weight of CO2 can the cylinder hold under similar conditions of temperature and pressure? (H = 1, C = 12, O = 16)
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.
Fill in the following blanks :
60 g of carbon element are .............. moles of carbon atoms.
Fill in the following blanks :
64 g of oxygen gas contains ................ moles of oxygen atoms.
What do you understand by the term mole? How many elementary units are in one mole of a substance?
Calculate the number of molecules in 12.8g of sulphur dioxide gas. Take Avogadro's number as 6 x 1023.
[S = 32, 0 = 16 ]
Calculate the mass of 0.1 mole of carbon dioxide.
[Atomic mass: S = 32, C = 12 and O = 16 and Avogadro's number = 6 × 1023]
How many grams of Al are present in 0.2 mole of it?
If phosphorus is considered to contain P4 molecules, then calculate the number of moles in 100g of phosphorus?
Four grams of caustic soda contains ______.
Solid ammonium dichromate decomposes as:
\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]
If 63 g of ammonium dichromate decomposes. Calculate the quantity in moles of nitrogen formed.
