Which one of the samples contains the most molecules? (C=12, H=1, O=16, U=238, F=19, He=4)
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Adi S.
How many molecules are in each sample? \begin{equation}\quad \text { a. } 6.5 \mathrm{gH}_{2} \mathrm{O} \quad \text { b. } 389 \mathrm{gCBr}_{4} \quad \text { c. } 22.1 \mathrm{g} \mathrm{O}_{2} \quad \text { d. } 19.3 \mathrm{g} \mathrm{C}_{8} \mathrm{H}_{10}\end{equation}
If you have equal mole samples of $\mathrm{NO}_{2}$ and $\mathrm{F}_{2},$ which of the following must be true? a. The number of molecules in each sample is the same. b. The number of atoms in each sample is the same. c. The masses of the samples are the same. d. $6.022 \times 10^{23}$ molecules are present in each sample.
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