Scelta multipla
What is the mass of sodium metal that contains 4.653 × 10^{19} Na atoms? (Atomic mass of Na = 22.99 g/mol)
288
views
2. Atoms & Elements
Mole Concept
Scelta multipla
How many moles are present in 82.5 grams of iron (Fe)? (Molar mass of Fe = 55.85 g/mol)
A
0.48 moles
B
1.48 moles
C
0.67 moles
D
2.12 moles
Guida verificata passo dopo passo1
Identify the given information: mass of iron (Fe) is 82.5 grams, and the molar mass of Fe is 55.85 g/mol.
Recall the formula to calculate moles from mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
Substitute the given values into the formula: \(\text{moles} = \frac{82.5}{55.85}\).
Perform the division to find the number of moles of iron present.
Compare your calculated value with the provided options to select the correct number of moles.
Video correlati
Pratica correlata
