Scelta multipla
For which compound does 0.256 mol have a mass of 12.8 g? (Assume the compound is pure.)
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2. Atoms & Elements
Mole Concept
Scelta multipla
Which quantity is equal to one mole of gold, ?
A
atoms of
B
grams of
C
atoms of
D
grams of
Guida verificata passo dopo passo1
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.
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