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Define law of conservation of mass....

Define law of conservation of mass.

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This law states that "During any physical or chemical change, the total mass of the product, remains, equal to the total mass of the reactants".
Ex: `underset(100g)("Mercuric oxide") overset(Delta) to underset(92.6 g) ("mercury") + underset(7.4 g)("oxygen")`
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SUBHASH PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY -TWO MARKS QUESTIONS AND ANSWERS
  1. Express 150 pounds in SI units

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  2. Write 325 g and 0.0010 g in exponential notation.

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  3. Define law of conservation of mass.

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  4. Explain law of constant composition with suitable example.

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  5. State Gay Lussac's law.

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  6. Compute the mass of one molecule and the molecular mass of C(6)H(6) (b...

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  7. An organometallic compound on analysis was found to contain, C = 64.4%...

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  8. 4 g of copper chloride on analysis was founded to contain 1.890 g of c...

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  9. Calculate the number of grams of oxygen in 0.10 mol of Na(2)CO(3).10H(...

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  10. How many grams of Cl(2) are required to completely react with 0.4 g of...

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  11. Conc. HCl is 38% HCl by mass. What is the molarity of this solution is...

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  12. State Gay Lussac's law.

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  13. Calculate the volume of O(2) at STP liberated by heating 12.25 g of KC...

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  14. 1 M solution of NaNO(3) has density 1.25 g cm^(-3). Calculate its mola...

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  15. Explain how compounds differ from elements? Give two differences.

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  16. Explain how mixture differs from pure substances? Give 2 difference.

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  17. Classify each of the following as pure substances or mixture, (a) Ethy...

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  18. Define avogadro's law.

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  19. Discuss average atomic mass with an example.

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  20. Calculate the molecular mass of water (H(2)O) and water (O(2)) and oxy...

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