Homework 7/16

Page 181 #13-21

13. A) 6 moles

B) 5 moles

C) 5 moles

14. A) 1 mole

B) 621 grams

C) 28 grams

D) 415 grams

15. 32/44 grams x 100= 73%

16.  A) 216/248 grams x 100% =87% silver

B) 54/102 grams x 100%= 53% aluminum

C) 40/100 grams x 100%= 40% calcium

17. A) 207g/303g x 100%= 68% lead

B) 5g/50g x 100%= 10% PbSO4

C) 68 x .10= 6.8% Pb

D) Insert graphs and diagrams

18. A) Reusing is when you use the same product more than 1 time for the same thing, but recycling means the product is used again but for another reason or purpose.

B) Reusing- Clothes and Containers

Recycling- Old computer parts and Composed piles

19. A) Solar energy, biomass, wood, and natural gas

B) Coal, fossil fuels, food oil/petroleum, and gas

20. A) Reusing

B) Recycling

C) Recycling

21. A light bulb can only be recycled but a newspaper could be reused and recycled for different things.