How many grams of formaldehyde, CH₂O, are present in 5.0×10⁶molecules of formaldehyde?
Molar Mass(CH₂O) = 30.03 g/mol

Question

How many grams of formaldehyde, CH₂O, are present in 5.0×10⁶molecules of formaldehyde? Molar Mass(CH₂O) = 30.03 g/mol

Quizplus · Accepted Answer

To find the mass of 5.0×10^16 molecules of formaldehyde, we need to first find the number of moles of formaldehyde present in the given quantity of molecules, using Avogadro's number:
Number of moles = 5.0×10^16 molecules / 6.022×10^23 molecules/mol = 8.3×10^-8 mol

Then, we can use the molar mass of formaldehyde to find the mass of 8.3×10^-8 mol:
Mass = 8.3×10^-8 mol × 30.03 g/mol = 2.49×10^-6 g = 2.49×10^-16 kg

Therefore, the answer is B, 2.49×10^-16 g CH2O.

How Many Grams of Formaldehyde, CH2O, Are Present in 5

How Many Grams of Formaldehyde, CH₂O, Are Present in 5