Which of the following quantities is the same for one mole of Br2(l) and one mole of He(g)?
Question 1 Report
Which of the following quantities is the same for one mole of Br2(l) and one mole of He(g)?
Answer Details
The quantity that is the same for one mole of Br2(l) and one mole of He(g) is the number of molecules. One mole of any substance contains the same number of particles, known as Avogadro's number (6.022 x 1023 particles per mole). Therefore, one mole of Br2(l) and one mole of He(g) both contain the same number of molecules. The number of atoms and total mass of particles in one mole of Br2(l) and one mole of He(g) are different, as Br2(l) is a molecular substance and contains two bromine atoms per molecule, while He(g) is an element and contains only one helium atom per particle. The volume occupied at s.t.p. by one mole of Br2(l) and one mole of He(g) is also different, as the volume depends on the size and shape of the particles, and the conditions of temperature and pressure.
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