Problem 6.24 Part A Calculate each of the following. moles of Cu in 9.1x1021 ato

Question

Problem 6.24 Part A Calculate each of the following. moles of Cu in 9.1x1021 atoms of Cu Express your answer to two significant figures and include the appropriate units. HA Sh An o . ? Value | Units Submit my powers are up Part B moles of CH, in 9.75x1023 molecules of C, H, Express your answer to three significant figures and include the appropriate units. THA o . h r ? Value Units Submit | My answers Give Up Part C moles of Zn in 9.6x1024 atoms of Za Express your answer to two significant figures and include the appropriate units. CHWA n n o o ? | Valued Units Submit My up Answers ONE Prov

Explanation / Answer

A)
moles of Cu = number of atoms / Avogadro’s number
= 9.1*10^21 / (6.022*10^23)
= 0.015 mol
Answer: 0.015 mol

B)
moles of C2H6 = number of molecules / Avogadro’s number
= 9.75*10^23 / (6.022*10^23)
= 1.62 mol
Answer: 1.62 mol

C)
moles of Zn = number of atoms / Avogadro’s number
= 9.6*10^24 / (6.022*10^23)
= 16 mol
Answer: 16 mol

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