Thursday, August 02, 2012

Mole calculations (Chemistry) Class XI All Boards (CBSE/ISC/WB etc)




Mole calculations for practice
Class: XI                                                                      Subject: Chemistry
Total Marks: 10                                                           

1.                  The atomic mass of Na is 23. Find the mass of 1 Na atom?
2.                  How many moles are present in 11.2 liters of O2 under normal conditions?
3.                  Convert 64g of O2 gas in moles.
4.                  Convert 54g of H2O in moles.
5.                  How many moles are present in 44.8 liters of Cl2 gas under normal conditions?
6.                  What volume does 44g of CO2 at STP occupy?
7.                  What is the mass of 2 mol of H2SO4?
8.                  How many molecules of H2O are present in 36g of water?
9.                  How many molecules are there in 21.6g of CH4?
10.              What will be the weight of 1 mole of CuBr in gram?


ANSWERS:
  1. 3.82 x 10-23
  2. 0.5 moles
  3. 2.0 moles
  4. 3.0 moles
  5. 2.0 moles
  6. 22.4 liters
  7. 196g
  8. 1.2 x 1024
  9. 8.13 x 1023
  10. 71.2
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