Final answer:
To determine the number of atoms in 1.94 mL of mercury, we can convert the volume to mass using the density of mercury. Then, by using the molar mass of mercury, we can convert the mass to the number of mercury atoms. The number of atoms in 1.94 mL of mercury is approximately 7.82 x 10^22 atoms.
Step-by-step explanation:
To determine the number of atoms in 1.94 mL of mercury, we need to convert the volume to mass using the density of mercury. The density of mercury is 13.5 g/mL, so we can calculate the mass of mercury in the given volume.
Mass of mercury = density of mercury x volume of mercury
Mass of mercury = 13.5 g/mL x 1.94 mL = 26.19 g
Next, we need to convert the mass of mercury to the number of mercury atoms using the molar mass of mercury (200.59 g/mol).
Number of mercury atoms = mass of mercury / molar mass of mercury
Number of mercury atoms = 26.19 g / 200.59 g/mol = 0.13 mol x 6.022 x 10^23 atoms/mol (Avogadro's number) = 7.82 x 10^22 atoms