MOLE CONCEPT
1. What
is the value of one mole?
2. Calculate the number of molecules present in 0.5 moles of CO2?
3. If atomic mass of Mg atom is 24 g, find mass of 1 Mg atom.
4. Two containers A & B are filled with 4 gram hydrogen gas and 32 gram oxygen gas respectively. Which of the two containers have more moles?
5. How much copper can be obtained from 100g copper sulphate?
6. A 12g sample of a gas occupies 19.2 litres at STP. What is the molecular weight of the gas?
7. A balloon is filled with helium gas at STP, the volume of the balloon is 2.24dm3. Find the amount of helium gas in terms of moles?
8. Calculate the number of atoms in each of the following. (a) 52 moles Ar (b) 52 u He (c) 52g He.
9. What is molar volume?
10. Calculate the number of bromide ions in 3 moles of mercury(II)bromide?
11. One gram molecule of H2O contains how many moles of molecules and number of molecules?
12. How many moles are present in 15g of C2H4(ethylene)?
13. In 14g of N2 calculate no.of atoms?
14. Define mole?
15. Why was there need to use this number called mole?
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