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wolverine [178]
2 years ago
11

4.5 × 1025 atoms of nickel equal how many moles? A. 27 mol B. 2.7 × 1048 mol C. 0.75 mol D. 75 mol

Chemistry
2 answers:
crimeas [40]2 years ago
7 0

Answer:

75 mol

Explanation:

The number of atoms in a mole of substance is 6.023X10²³ [Avagadro's number]

if the given sample of nickel contains 4.5X10²⁵ atoms it means the moles are

moles = \frac{numberofatoms}{Avagadro'snumber}

moles = \frac{4.5X10^{25}}{6.023X^{23}}=74.71mol

If we round of the given answer the number of moles = 75 moles

Molodets [167]2 years ago
4 0
It's 75
PS use ^ to mean to the power of
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