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
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.
APPEARS IN
RELATED QUESTIONS
Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)?
What is the mass of 10 moles of sodium sulphite (Na2SO3)?
Calculate the percentage of water of crystallization in CuSO4.5H2O
(H = 1, O = 16, S = 32, Cu = 64)
What name is given to the amount of substance containing this number of atoms ?
Fill in the blank.
One a.m.u. is the mass of ______ atom of C12.
A student puts his signature with graphite pencil. If the mass of carbon in the signature is 10-12 g. Calculate the number of carbon atoms in the signature.
Which of the following would weight the least?
[Atomic masses : Ag = 108, N - 14, O = 16,C = 12]
Find the number of moles in 10 g of CaCO3.
Calculate the number of oxygen atoms in 0.10 mole of Na2CO3.10H2O.
Solid ammonium dichromate decomposes as:
\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]
If 63 g of ammonium dichromate decomposes. Calculate the quantity in moles of (NH4)2Cr2O7.
