Advertisements
Advertisements
Question
Which of the following weighs the least?
Options
2 g atom of N
3 x 1025 atoms of carbon
1 mole of sulphur
7 g silver
Advertisements
Solution
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.
RELATED QUESTIONS
Fill in the following blanks :
64 g of oxygen gas contains ................ moles of oxygen atoms.
Which of the following pair of elements represents a mole ratio of 1 : 1 ?
Define the term:
Avogadro’s number
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
What volume of dinitrogen oxide is produced at the same time as 8.96 L of steam?
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
Determine the percentage of oxygen in the ammonium nitrate?
Find the number of moles in 10 g of CaCO3.
Calculate the number of molecules in one Kg of calcium chloride.
The number of molecules in 4.25 g of ammonia is ______.
From the equation for burning of hydrogen and oxygen
\[\ce{2H2 + O2 -> 2H2O}\] (Steam)
Write down the number of mole (or moles) of steam obtained from 0.5 moles of oxygen.
Deduce the number of molecules of the following compound in the given quantity.
7.1 g chlorine
