Multiple Choice
If 0.500 mol of copper combines with 0.250 mol of sulfur, what is the empirical formula of the copper sulfide product?
3. Chemical Reactions
Empirical Formula
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What mass (in g) of carbon is in a sample of acetone (CH3COCH3) that contains 6.02 x 10^23 atoms of hydrogen?
A
24 g
B
12 g
C
48 g
D
36 g
Verified step by step guidance1
Determine the number of hydrogen atoms in one molecule of acetone (CH3COCH3). Acetone has 6 hydrogen atoms.
Use Avogadro's number to find the number of acetone molecules in the sample. Since there are 6.02 x 10^23 hydrogen atoms, divide this number by 6 to find the number of acetone molecules.
Calculate the number of moles of acetone using the number of molecules obtained in the previous step and Avogadro's number (6.022 x 10^23 molecules/mol).
Determine the molar mass of carbon in acetone. Acetone has 3 carbon atoms, and the atomic mass of carbon is approximately 12 g/mol, so the total mass of carbon per mole of acetone is 3 x 12 g/mol.
Multiply the number of moles of acetone by the mass of carbon per mole to find the total mass of carbon in the sample.
2:26mWatch next
Master Empirical vs Molecular Formula with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Empirical Formula practice set
Problem sets built by lead tutorsExpert video explanations