GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How many total ELEMENTS are in the following compound:2C2H4O2
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3
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8
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10
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16
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Explanation:
Detailed explanation-1: -A compound is a unique substance that consists of two or more elements combined in fixed proportions. This means that the composition of a compound is always the same.
Detailed explanation-2: -Hence the number of elements present in $NH 4C 2H 3O 2$ are four.
Detailed explanation-3: -Multiply the atomic weight (from the periodic table) of each element by the number of atoms of that element present in the compound. 3. Add it all together and put units of grams/mole after the number. For many (but not all) problems, you can simply round the atomic weights and the molar mass to the nearest 0.1 g/mole.
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