CHEM 1405-How many molecules are present in

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June 8th, 2024

1.How many molecules are present in:a. 0.0152 moles of CO2b. 15.2g of CH4.2.How many moles are present in:a. 2.85 x 10^21 molecules of H2b. 7.85g of I23. A sample of an iron chloride compound contained 68.87g of Fe and 131.13g of Cl. Suppose a second sample was found to contain 20.66g of Fe. Assuming the compound follows the law of definite proportions, then what mass of Cl would be present in this sample?4.Silver has two naturally occurring isotopes; one is 107Ag with a mass of 106.91amu and the second 109Ag with a mass of 108.90amu. If the atomic weight of silver is 107.87amu, then what are the percent abundance’s of each of the two isotopes?

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