Advertisements
Advertisements
Question
What is the mass of 0.2 mole of oxygen atoms?
Advertisements
Solution
Mass of one mole of oxygen atoms = 16 g
Then, mass of 0.2 mole of oxygen atoms = 0.2 × 16g = 3.2 g
RELATED QUESTIONS
Calculate the molar mass of the following substance:
Nitric acid, HNO3
Fill in the following blanks :
60 g of carbon element are .............. moles of carbon atoms.
Explain with examples what is meant by a 'mole' of a substance.
Explain the term:
Gram mole
What do you understand by the term mole? How many elementary units are in one mole of a substance?
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]
What is Molar volume of a gas?
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.
Deduce the number of molecules of the following compound in the given quantity.
90g water
Deduce the number of molecules of the following compound in the given quantity.
8.8g carbon dioxide
