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प्रश्न
Fill in the blank.
One a.m.u. is the mass of ______ atom of C12.
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उत्तर
One a.m.u. is the mass of one atom of C12.
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संबंधित प्रश्न
What is the mass of 0.2 mole of oxygen atoms ?
Correct the following statement :
Equal masses of all gases under identical conditions contain the same number of molecules.
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]
Define the term:
Relative molecular mass
The molecular formula for elemental sulphur is S8. In a sample of 5.12 g of sulphur:
How many moles of sulphur are present?
Correct the statement, if required.
One mole of chlorine contains 6.023 x 1010 atoms of chlorine.
Correct the statement, if required.
The relative atomic mass of an element is the number of times one molecule of an element is heavier than `1/12` the mass of an atom of C12.
How many grams are there in the following?
3 moles of chlorine molecule, Cl2.
How many grams are there in the following?
4 moles of the phosphorous molecule, P4
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 | - |
