Question

What is the mass of 3.91 x 10^24 molecules of SeO2? The molar mass of SeO2 is 110.96 g/mol

Answer 1

The mass of 3.91 x 10^24 molecules of SeO2 is 724.03 grams.

Step-by-step explanation:

To find the mass of 3.91 x 10^24 molecules of SeO2, we need to first calculate the molar mass of SeO2. The molar mass of SeO2 is 110.96 g/mol. We can use this information to convert the number of molecules to grams:

(3.91 x 10^24 molecules) x (1 mol / 6.02 x 10^23 molecules) x (110.96 g/mol) = 724.03 g

Therefore, the mass of 3.91 x 10^24 molecules of SeO2 is 724.03 grams.

Answer 2

Step-by-step explanation:

110.96gmol⁻¹ ≡≡≡≡≡≡6.02×10²³ molecules

x gmol⁻¹ ≡≡≡≡≡≡≡≡≡≡≡≡ 3.91×10²⁴molecule

x = [110.96 × 3.91×10²⁴]/(6.02×10²³)

x = 720.7gmol⁻¹