Multiple Choice
For which compound does 0.256 mol have a mass of 12.8 g? (Assume the compound is pure.)
1
views
2. Atoms & Elements
Mole Concept
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which quantity is equal to one mole of gold, ?
A
atoms of
B
grams of
C
atoms of
D
grams of
Verified step by step guidance1
Recall that one mole of any substance contains Avogadro's number of particles, which is \$6.022 \times 10^{23}$ particles (atoms, molecules, etc.).
Understand that the atomic mass unit (amu) is a unit of mass used to express atomic and molecular weights, where 1 amu is defined as one twelfth the mass of a carbon-12 atom.
Recognize that the molar mass of gold (Au) is approximately 197 grams per mole, meaning one mole of gold atoms has a mass of about 197 grams.
Identify that one mole of gold corresponds to \$6.022 \times 10^{23}$ atoms of gold, not 197 atoms or 197 grams alone.
Conclude that the quantity equal to one mole of gold atoms is \$6.022 \times 10^{23}$ atoms of Au.
Related Videos
Related Practice
