How many ATOMS of carbon are present in 1.59 moles of carbon monoxide? How many MOLES of oxygen are present in 9.31×1022 molecules of carbon monoxide?

Question

1. How many ATOMS of carbon are present in 1.59 moles of carbon monoxide? ______ atoms of carbon.
2. How many MOLES of oxygen are present in 9.31×10²² molecules of carbon monoxide? _____ moles of oxygen.

Answer 1

This site is not intended to do your HW for you. Please ask one question at a time. I almost never respond to multiple questions and I am sure other tutors have a similar policy. I am answering here because you appear new to the site. An easy way to do these problems is to use factor labeling. number of atoms (or molecules), number of moles, and grams are all extensive variables (they measure how much stuff is there). Start with the amount you are given and use Avogadro's number: 6.02 x 10²³ atoms/mole, mole ratios from formulas or reaction statements like 1 mole of C in 1 mole of CO and 1 mole of O in 1 mole of CO or 2 moles of O is 1 mole of CO₂. The point of moles is that all the ratios of moles are the same as for molecules and atoms.

1.59 moles CO * (1 mole C/1 mole CO)(6.02 x 10²³ atoms C/ mole C) = 9.57 x 10²³ atoms of C

9.31 x 10²² molecules of CO (1 atom O/molecule CO)(1 mole/6.02 x 10²³atoms) = .155 moles O

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