How many carbon atoms are contained in 5.50 g of ethane,C₂H₆? A) 2.75 *10^-22 B) 3.29 * 10²⁴ C) 1.10 * 10²³ D) 2.21 * 10²³

Question

Quizplus · Accepted Answer

To solve this problem, we need to use the molar mass of ethane to convert from grams to moles, and then use Avogadro's number to convert from moles to number of carbon atoms.

The molar mass of ethane (C2H6) is:

2(12.01 g/mol) + 6(1.01 g/mol) = 30.07 g/mol

Using this molar mass, we can calculate the number of moles of ethane in 5.50 g as:

5.50 g / 30.07 g/mol = 0.183 moles

Finally, using Avogadro's number (6.022 x 10^23 atoms/mol), we can calculate the number of carbon atoms as:

0.183 moles x 2 (since there are 2 carbon atoms in each molecule of ethane) x 6.022 x 10^23 atoms/mol = 2.21 x 10^23 carbon atoms

Therefore, the answer is D. 2.21 x 10^23 carbon atoms.

How Many Carbon Atoms Are Contained in 5