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General Chemistry Principles, Patterns, and Applications, 2011

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a.<br />

b.<br />

8. Calculate the number of moles in 5.00 × 10 2 g of each substance. How many molecules or formula units are<br />

present in each sample?<br />

a. CaO (lime)<br />

b. CaCO 3 (chalk)<br />

c. C 12 H 22 O 11 [sucrose (cane sugar)]<br />

d. NaOCl (bleach)<br />

e. CO 2 (dry ice)<br />

9. Calculate the mass in grams of each sample.<br />

a. 0.520 mol of N 2 O 4<br />

b. 1.63 mol of C 6 H 4 Br 2<br />

c. 4.62 mol of (NH 4 ) 2 SO 3<br />

10. Give the number of molecules or formula units in each sample.<br />

a. 1.30 × 10 −2 mol of SCl 2<br />

b. 1.03 mol of N 2 O 5<br />

c. 0.265 mol of Ag 2 Cr 2 O 7<br />

11. Give the number of moles in each sample.<br />

a. 9.58 × 10 26 molecules of Cl 2<br />

b. 3.62 × 10 27 formula units of KCl<br />

Saylor URL: http://www.saylor.org/books<br />

Saylor.org<br />

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