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O Level Chemistry & IP Chemistry Notes by 10 Year Series Author – Chemistry Specialist

O Level Chemistry & IP Chemistry Notes by 10 Year Series Author - Chemistry Specialist

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O Level Chemistry: Mole Concepts / Chemical Calculations

Here is another question on Mole Concepts / Chemical Calculations for you to try. Leave your answer and working in the “Comment Section” directly below this post so that we can come together to discuss on it.

Example:
A metal compound has the formulae XCl4 and a relative formula mass of 261. What is:
a) The relative atomic mass of X? (ans: 119)
b) Metal X? (ans: Tin)

PS: “Either You Practice & Use It, or You Loose It!”

PPS: Check ?Comments? below for Suggested Answers.

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  • O Level Chemistry: Mole Concepts / Chemical Calculations
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  • O Level Chemistry: Mole Concepts / Mole Calculations

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Comments

  1. sean says

    March 9, 2008 at 11:47 pm

    Good way to approach the question. Keep up the good work.

  2. Jennifer says

    March 8, 2008 at 11:44 pm

    a) Mr of Cl4
    = 35.5 X 4
    = 142

    Mr of XCl4 = Ar of X + Mr of Cl4
    Hence, Ar of X
    = 261-142
    =119

    b) Ar of tin = 119 (refer to periodic table)

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