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9 April, 20:44

In which compound is the percent by mass of oxygen greatest?

A. BeO

B. MgO

C. CaO

D. SrO

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Answers (1)
  1. 9 April, 20:59
    0
    The answer is A

    Hide the Oxygen for a minute

    Mass of elements:

    Be:9.012

    Mg:24.305

    Ca:40.078

    Sr:87.62

    Out of all these choices, Be is the lightest
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