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How many significant figures are present...

How many significant figures are present in the followings? 285

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285-3 significant figures
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A N EXCEL PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY-QUESTION BANK
  1. An organic compound on analysis gave the following composition: carbon...

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  2. Define 1 mole

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  3. What is the number of hydrogen atoms in one mole of methane (CH4)?

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  4. The mole concept helps in handling a large number of atoms and molecul...

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  5. What is atomic mass unit (amu)?

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  6. In a reaction A+B2rarrAB2. identify the limiting reagent in the reacti...

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  7. Calculate the mass of NaOH required to make 500 mL of 0.5 molar aqueou...

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  8. How many moles of dioxygen are present in 64g of dioxygen? (Molecular ...

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  9. The following data were obtained when dinitrogen (N2) and dioxygen (O2...

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  10. What is atomic mass unit (amu) ?

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  11. Hydrogen combines with oxygen to form two different compounds, namely,...

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  12. Hydrogen combines with oxygen to form two different compounds, namely,...

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  13. How many significant figures are present in the followings? 0.0025

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  14. How many significant figures are present in the followings? 285

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  15. A given compound always contatins exactly the same proportion of eleme...

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  16. A given compound always contatins exactly the same proportion of eleme...

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  17. A given compound always contatins exactly the same proportion of eleme...

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  18. A given compound always contatins exactly the same proportion of eleme...

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  19. When nitrogen and hydrogen combine to form ammonia, the ratio between ...

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  20. A compound is made up of two elements A and B has A = 70%, B = 30%. Th...

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