According to Avogadro's law, which of the following is/are TRUE?
1. One gram of any substance contains the same number of particles.
2. Equal volumes of gases at standard temperature, standard pressure, dry (STPD) have the same number of molecules.
3. Equal numbers of gas molecules at STPD occupy the same volume.
a. 1 and 2 only
b. 1, 2, and 3
c. 2 and 3 only
d. 1 only
ANS: D
Avogadro's law states that the 1-g atomic weight of any substance contains exactly the same number of atoms, molecules, or ions.
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Fill in the blank(s) with correct word
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