Unit 5: Moles and Measurements |
Unit 5 Notes
|
|
Unit 5 Homework
|
|
Chemball Answers: |
|
Unit 5 Significant Figures Homework KEY
Significant Figures W.S.
Unit 5 Conversion W.S. #1
Unit 5 Mole Conversion WS #1 KEY
Unit 5 Mole Conversion WS #2 KEY
Unit 5 Mole Conversion WS #3 KEY
Significant Figures W.S.
- To communicate the exactness of our measurements.
- exact –counting objects (12 apples), definitions (100 cm in a meter)
- 5 b. 6 c. 1 d. 4 e. 6 f. 1 g. 3 h. 1 i. 3 j. 5 k. 3 l. 4
- a. 3,300 b. 0.0050 c. 6.0 x 104 d. 3.5 x 10-4 e. 4.5 x 10-4 f. 7.9 g. 10. h. 0.0031 i. 5.6 j. 0.15 k. 97 l. 3.3
- a. 3.251 x 103 b. 5 x 10-3 c. 6 x 104 d. 0.000350 e. 0.00045
- # sig figs in least exact measurement.
- digit place in least exact measurement
- a. 17000 b. 180 c. 0.06 d. 60 e. 40
Unit 5 Conversion W.S. #1
- 340 mg
- 4.82 m
- 0.0144 L
- 2.2 micrometers
- 30,000 min
- 40 cg
- 1400 microliters
- 6,268.47 yd
- 1.15 m/s
- 1070 mph
- 24 kg
- 6 x 1010 ft
- 2.1 g/cm3
- 2.2 mL
- 16,000 g
- 73.2 kL
- 0.034 kg
- 3.34x1012 pL
- 390 weeks
- 5100 seconds
- a) 600 cal b) 350 carbs
- a) $0.76/L b) $763 /kL c) $0.72/qt
- 50 mph
- 3,405,000 m/hr
- 2x1010m/min
- 1x1012m/hr
- 9x1015 m/yr
- 9x106 Gm
- 9x108 Gm
- 3x104 Gm
- 1.22x10-4L
- 5 kg
- 0.760 qt.
- 0.196 lbs
- 0.00431 m3
- 86,300 mm3
- 5.94x1019 μm3
Unit 5 Mole Conversion WS #1 KEY
- 6.022 x 1023 things
- kg, g, lbs, oz, amu, cg, mg
- dozen, mole, pair, ream, gross
- 16.00 g
- 22.99 g
- 6.022 x 1023 atoms
- 6.022 x 1023 atoms
- 8 x 1024 Cu atoms
- 0.048 moles of Fe2O3
- 380. g
- 2.1 x 1024 stars
- 3.36 x 1023 H atoms
Unit 5 Mole Conversion WS #2 KEY
- 56 tires
- 1.18x1024 H atoms
- 166.8 g chalk
- 3.30x103 g Zn(NO3)2 ß or use overbar
- 0.01723 g Au or 17.23 mg
Unit 5 Mole Conversion WS #3 KEY
- 8.35 x1023 H atoms
- 9.09 x1022 O atoms
- 40. g Cu2O
- 6.568 x1023 O atoms
- 2.13x1022 Ag atoms