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प्रश्न
Define or explain the term:
Relative atomic mass
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उत्तर
The relative atomic mass of an element is the number of times one atom of the element is heavier than `1/12` times of the mass of an atom of carbon-12.
संबंधित प्रश्न
Calculate the molar mass of the following substance:
Sulphur molecule, S8
What is the mass of 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?
One of the following elements has an atomicity of ‘one’. This element is :
Fill in the following blanks :
A mole represents an .............. number of particles of a substance.
Calculate the mole ratio of 240 g of calcium and 240 g of magnesium. (Ca = 40 u ; Mg = 24 u)
Define mole. What are the two things that a mole represents.
The ratio of moles of atoms in 12 g of magnesium and 16 g of sulphur will be :
The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
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]
