Advertisements
Advertisements
प्रश्न
Which of the following weighs the least?
पर्याय
2 g atom of N
3 x 1025 atoms of carbon
1 mole of sulphur
7 g silver
Advertisements
उत्तर
7 g silver
Explanation:
wt. of 2 g atom of N = 2 x 14 = 28 g
wt. of 3 x 1025 atoms of carbon = `(12 xx 3 xx 10^25)/(6.022 xx 10^23)` = 597.7 g
wt. of 1 mole of sulphur= 32 g
silver = 7 g
∴ silver has the least weight.
APPEARS IN
संबंधित प्रश्न
What name is given to the amount of substance containing 6.022 × 1023 particles(atoms,molecules or ions) of a substance ?
Which of the following pair of elements represents a mole ratio of 1 : 1 ?
Explain the term:
Gram atom
Calculate the number of moles and number of molecules present in 1.4 g of ethylene gas. What is the volume occupied by the same amount of ethylene?
Find the number of molecules in 1.8 g of H2O.
How many grams of CO2 is present in 0.1 mole of it?
Calculate the number of atoms in the following:
52 moles of He
Calculate the number of moles in 7g of nitrogen.
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.
The difference in the mass of 100 moles each of sodium atoms and sodium ions is 5.48002 g. Compute the mass of an electron.
