Scelta multipla
What is the quantity, in moles, of KBr present in 60.0 mL of a 0.150 M KBr solution?
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2. Atoms & Elements
Mole Concept
Scelta multipla
How many atoms are present in 3 moles of chromium (Cr)?
A
3.00 \(\times\) 10^{24} atoms
B
9.03 \(\times\) 10^{23} atoms
C
6.02 \(\times\) 10^{23} atoms
D
1.81 \(\times\) 10^{24} atoms
Guida verificata passo dopo passo1
Recall that one mole of any substance contains Avogadro's number of particles (atoms, molecules, etc.), which is \(6.02 \times 10^{23}\) particles per mole.
Identify the quantity given: 3 moles of chromium (Cr). We want to find the total number of atoms in these 3 moles.
Use the relationship: Number of atoms = (number of moles) \(\times\) (Avogadro's number). Mathematically, this is \(\text{atoms} = 3 \times 6.02 \times 10^{23}\).
Multiply the numerical values and keep track of the powers of ten carefully to find the total number of atoms.
Express the final answer in scientific notation to match the format of the given options.
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