1.10 Review

Give the number of significant figures in each measurement a. 2.00 grams b. 0.30 liters c. 1.002 meters d. 0.0032 g 3 2 4 2 e. 3000 miles f. 48000 liters g. 9.000 mm h. 5.10 kg  1 2 4 3 i. 400. mm j. 700 mg k. 0.0080 g l. 230. lb. 3 1 2 3

Carry out the following calculations 9.5 cm x 29.00 cm = b. 1.5 g + 39.12 g =  280 cm 40.6 g   4 m x 7 m x 9 m = d. 100. mL - 7.423 mL = 300 m 93 ml

. 84.9 g – 30. g + 0.67 g = f. 17.000 L/ 3 s =  56 g 6 L/s   g. ( 3.0 g + 13.46 g - 9 g) = h. 0.0075 h + 0.321 h = 21.56 s  .3 g/s .329 h

3. Round each of the following measurements to 3 significant figures: a. 0.00456 L b. 23.546 m  .00456 L 23.5 m c. 5.008 s d. 3.0447 km   5.01 s 3.04 km e. 0.014089 g f. 1.999 L .0141 g 2.00 L

4. a. Determine the density of a metal that has a mass of 18 4. a. Determine the density of a metal that has a mass of 18.09 g and occupies 9.1 mL. (Given the density equation is D = m/v)    2.0 g/ml b. If the accepted value for the density is 1.86 g/mL, determine the relative error.  5%

5. If the mass of piece of metal is 45. 78 g and its density is 3 5. If the mass of piece of metal is 45.78 g and its density is 3.89 g/mL, what is its volume? 11.8 ml

6. Describe the process of lighting a Bunsen burner.    Turn on gas and light with a flint strike or a match. If the flame is yellow more airflow is necessary. 7. Describe the difference between mass vs. weight and explain how each is measured.  mass is based on how much matter makes up a substance and is measured with a balance.  weight is based on the force of gravity on matter and is measured with a scale 8. Explain the difference between qualitative data and quantitative data and give an example of each. Qualitative data is descriptive and can be made without measurements. Quantitative data is numerical and is directly measured

9. Explain the advantages and disadvantages to using a pipet, buret and graduated cylinder. Pipet - difficult to use but very accurate. Buret –Calibrated to deliver. Good for multiple samples Graduated Cylinder – less accurate, difficult “to deliver”