What is true about proportions?

Select all that apply.

A)Proportions have cross products that are equal.
B)Proportions are sums that compare compounds.
C)Proportions can be written as equal fractions.
D)Proportions are the amount of a substance that contains 6.02 x 1023 particles.

A & D?

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  1. What does D have to do with Avogadro's number?

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