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प्रश्न
Define the term:
Gram atom
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उत्तर
The quantity of the element which weighs equal to its gram atomic mass is called one gram atom of that element.
संबंधित प्रश्न
One of the following elements has an atomicity of ‘one’. This element is :
What name is given to the amount of substance containing this number of atoms ?
How many moles of calcium carbonate (CaCO3) are present in 10 g of the substance ? (Ca = 40 u ; C = 12 u ; O = 16 u)
What is meant by ‘a mole of carbon atoms’ ?
What do you understand by the term mole? How many elementary units are in one mole of a substance?
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.
Solid ammonium dichromate decomposes as:
\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]
If 63 g of ammonium dichromate decomposes. Calculate the quantity in moles of (NH4)2Cr2O7.
Compute the difference in masses of 103 moles each of magnesium atoms and magnesium ions.
(Mass of an electron = 9.1×10–31 kg)
Deduce the number of molecules of the following compound in the given quantity.
8.8g carbon dioxide
