Advertisements
Advertisements
प्रश्न
Raunak took 5 moles of carbon atoms in a container and Krish also took 5 moles of sodium atoms in another container of same weight.
- Whose container is heavier?
- Whose container has more number of atoms?
Advertisements
उत्तर
a. Mass of the container containing 5 moles of C atoms=5 x 12 = 60 g
Mass of container containing 5 moles of Na atoms=5 x 23 = 115 g
Hence, a container of Krish is heavier.
b. Both containers have same number of atoms since they co0ntailn same number of moles.
APPEARS IN
संबंधित प्रश्न
How many moles are there in 34.5 g of sodium ? (Atomic mass of Na = 23 u)
What is the mass of 5 moles of sodium carbonate (Na2CO3) ?
(Atomic masses : Na = 23 u ; C = 12 u ; O = 16 u)
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.
Given that the relative molecular mass of copper oxide is 80, what volume of ammonia (measured at STP) is required to completely reduce 120g of copper oxide? The equation for the reaction is :
3CuO + 2NH3 → 3Cu + 3H2O + N2
Complete the following calculations. Show working for complete credit :
Calculate the mass of calcium that will contain the same number of atoms as are present in 3.2 gm of Sulphur. [Atomic masses : S = 32, Ca = 40]
What is the value of molar volume of a gas at S.T.P?
Calculate the number of particles in 0.1 mole of any substance.
Calculate the number of atoms in the following:
52 moles of He
The number of molecules in 4.25 g of ammonia is ______.
Calculate the number of moles in 27g of Al.
