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प्रश्न
Fill in the blank
One gram atom of an element contains ______ atoms.
उत्तर
One gram atom of an element contains quantity of element which weights equal to its gram atomic mass atoms.
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संबंधित प्रश्न
Calculate the molar mass of the following substance:
Ethyne, C2H2
Fill in the following blanks :
A mole represents an .............. number of particles of a substance.
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 ?
Correct the following statement :
Equal masses of all gases under identical conditions contain the same number of molecules.
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]
Consider the following reaction and based on the reaction answer the questions that follow :
\[\ce{(NH4)2Cr2O7 ->[heat] N2(g) + 4H2O(g) + Cr2O3}\]
Calculate :
(i) The quantity in moles of (NH4)2Cr2O7 if 63 gm of (NH4)2Cr2O7 is heated.
(ii) The quantity in moles of nitrogen formed.
(iii) The volume in litres or dm3 of N2evolved at STP.
(iv) The mass in grams of Cr2O3 formed at the same time
[Atomic masses : H = 1, Cr=52, N=14]
How many grams of Al are present in 0.2 mole of it?
Cost of Sugar (C12H22 O11) is Rs 40 per kg; calculate its cost per mole.
N2 + 3H2 → 2NH3
(The atomic mass of nitrogen is 14, and that of hydrogen is 1)
1 mole of nitrogen (______ g) +
3 moles of hydrogen (______ g) →
2 moles of ammonia (______ g)
Cinnabar (HgS) is a prominent ore of mercury. How many grams of mercury are present in 225 g of pure HgS? Molar mass of Hg and S are 200.6 g mol–1 and 32 g mol–1 respectively.
