객관식
In chemistry, what does one mole represent?
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2. Atoms & Elements
Mole Concept
객관식
In the mole concept, how many atoms are present in 0.25 mol of magnesium (Mg)? (Use Avogadro’s number .)
A
atoms
B
atoms
C
atoms
D
atoms
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검증된 단계별 안내1
Understand that 1 mole of any substance contains Avogadro's number of particles (atoms, molecules, etc.), which is \(6.022 \times 10^{23}\) particles per mole.
Identify the given quantity: 0.25 moles of magnesium (Mg). We want to find the number of atoms in this amount.
Use the relationship: Number of atoms = (number of moles) \(\times\) (Avogadro's number). Mathematically, this is \(\text{atoms} = n \times N_A\).
Substitute the given values into the formula: \(\text{atoms} = 0.25 \times 6.022 \times 10^{23}\).
Perform the multiplication to find the total number of atoms present in 0.25 moles of magnesium.
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