How many `H_(2)O` molecules are there in a snowflake that weighs `4.0 xx 10^(-4) g` ?
A
`1.3 xx 10^(19)`
B
`2.4 xx 10^(20)`
C
`2.2 xx 10^(-5)`
D
`6.02 xx 10^(23)`
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The correct Answer is:
A
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