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Some Basic Conc...

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  • Question 1
    1 / -0

    Mass can neither be created nor destroyed. This is in agreement with which law of chemical combination?

  • Question 2
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    Which scientist proposed the concept of atomic mass?

  • Question 3
    1 / -0

    1.008 grams of hydrogen combines with 35.453 g of chlorine to form 36.463 g of a pure compound (hydrogen chloride). Dalton's explanation for this experimental fact might be: 

  • Question 4
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    Which of the following statement is true about mole?

  • Question 5
    1 / -0

    The formula for % composition of a compound is:

  • Question 6
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    Which is not one of the laws of chemical combinations?

  • Question 7
    1 / -0

    Which of these would support the idea that mass is conserved in a reaction that produces gas as a product?

  • Question 8
    1 / -0

    A solution contains 100 g of urea in 400 g of water. Calculate the concentration in terms of mass by mass percentage of the solution.

  • Question 9
    1 / -0

    Find the mass percentages (mass %) of Na, H, C, and O in sodium hydrogen carbonate.

  • Question 10
    1 / -0

    Mass number is denoted by:

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