Math Skills: More Practice
Math Skills: More Practice
Math Skills: More Practice
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Page 227: Balancing Chemical Equations<br />
1. 4Fe + 3O 2 2Fe 2O 3<br />
2. Fe 2O 3 + 3CO 2Fe + 3CO 2<br />
3. Na 2S + Zn(NO 3) 2 ZnS + 2NaNO 3<br />
4. 2C 14H 30 + 43O 2 30H 2O + 28CO 2<br />
5. 6CO 2 + 6H 2O C 6H 12O 6 + 6O 2<br />
Page 280: Molarity<br />
1. 0.250 M HCl<br />
2. 0.75 M KCl<br />
3. 0.45 mol C 12H 22O 11<br />
4. 49.3 g AgBr<br />
5. 4.2 L solution<br />
Page 299: Determining pH<br />
1. 3<br />
2. 5<br />
3. 10<br />
4. 0.01 M HI<br />
5. 1 × 10 –11 M H 3O +<br />
Page 331: Nuclear Decay<br />
1. a. Ca<br />
b. Pa<br />
2. nitrogen<br />
3. a. beta emission<br />
b. alpha emission<br />
4. thorium<br />
5. Po<br />
Page 334: Half-Life<br />
1. 6.25 g Th<br />
2. 7.8 × 10 –3 g Ra<br />
3. 32.2 days<br />
4. 4 years<br />
5. 1/32<br />
Page 369: Velocity<br />
1. 1.88 m/s straight ahead<br />
2. 0 m/s<br />
3. 13.19 s<br />
4. 5.0 × 10 4 m<br />
5. 78.5 km/h southeast<br />
Copyright © by Holt, Rinehart and Winston. All rights reserved.
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