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(a) What is meant by 'a mole of carbon ...

(a) What is meant by 'a mole of carbon atoms' ?
(b) Which has more atoms, 50 g of aluminium or 50 g iron ? Illustrate your answer with the help of calculations.
(Atomic masses : `Al = 27 u , Fe = 56 u`)

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The correct Answer is:
(b) `50 g` aluminium
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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
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  2. (a) Define mole. What are the two things that a mole represents. (b)...

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  3. (a) What is meant by 'a mole of carbon atoms' ? (b) Which has more...

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  4. (a) Define gram atomic mass of a substance. How much is the gram atomi...

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  5. (a) Define gram molecular mass of a substance. How much is the gram m...

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  6. (a) What is meant by the 'molar mass' of a substance ? State the unit ...

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  7. Which of the following pair of element represents a mole ratio of 1 : ...

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  8. Which of the following correctly represents 360 g of water? (i) 2 mo...

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  9. If 32 g of sulphur has x atoms, then the number of atoms in 32 g of o...

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  10. A student wants to have 3.011 xx 10^(23) atoms each of magnesium and ...

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  11. The ratio of moles of atoms in 12 g of magnesium and 16 g of sulphur w...

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  12. If 12 gram of carbon has x atoms, then the number of atoms in ...

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  13. Which of the following has the maximum number of atoms ?

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  14. If 1 gram of sulphur dioxide contains x molecules, how many molecule...

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  15. The mass of one molecule of a substance is 4.65 xx 10^(-23) g. What is...

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  16. Which contains more molecules, 10 g of sulphur dioxide (SO(2)) or 10 g...

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  17. What weight of oxygen gas will contain the same number of molecules a...

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  18. What mass of nitrogen, N(2), will contain the same number of molecule...

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  19. If one grams of sulphur contains x atoms, calculate the number of ato...

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  20. How many grams of magnesium will have the same number of atoms as 6 ...

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