Measuring mass 1. Find the actual weight of the items in the table below and record. Some hints on measuring Hint-Use the triple beam balance for smaller items, and the floor scale for larger ones. Ask your instructor for help using either of these. Hint-Your instructor will tell you about the weight of an automobile later. Hint-Unless you've got a million $1 bills handy, you'll need to think of another way of figuring out their weight. Think! mass of a penny mass of the physiology textbook mass of your backpack mass of you mass of a pen mass of an automobile mass of a million $1 bills actual

Referring to Table 2.8, which substance listed is most dense? Which substance is least dense? For the two substances you have identified, for which one would a 1.00-g sample occupy the larger volume?

1. You have 5 blocks that are the same size, but different 1 kg 2 kg 3 kg 4 kg 5 kg masses. The lightest one is 1kg, the heaviest one is 5kg. The picture shows how the 2kg and 5kg blocks float and sink in water. On the picture, draw where the other blocks would end up if you put them in the water. Explain why you think it would look that way? 2 kg

Ball # Ball #1 Ball #2 Ball #3 Ball #4 Ball #5 Ball #6 Ball #7 Unknown Ball #1 Unknown Ball #2 Unknown Ball #3 Mass (g) 130.58 g 66.90 g 8.35 g 2.71 g 1.49 g 0.70 g 0.24 g 225.52 g 16.33 g 1.812 kg Diameter (cm) 3.15 cm 2.55 cm 1.27 cm 0.97 cm 0.72 cm 0.56 cm 0.40 cm Volume (cm³) 1. Calculate the volume of ball bearings 1 - 7 and record the result with excess significant figures in the table above. Show one example calculation below. Density (g/cm³) Correct Sig Figs! 4 3 π = 3.14159 V= 3 π r³

1. Describe how to use conversion factors correctly using an example. 2. Write a number between 1.000 and 9999999.99. Write the number of significant figures in your number. 3. Give an example of how to find significant figures in calculations for A addition or subtraction B. multiplication and division

A jet airplane reaches 865. km / h on a certain flight . How long does it take to cover 459. m? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols

A jet airplane reaches 843. km /h on a certain flight. What distance does it cover in 15.0 min? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also , be sure your answer includes all the correct unit symbols.

The graph of weight vs. volume for copper is shown below. What is the volume of a piece of copper with a weight of 48.218g. Show how you determined this.

•All groups will add nystatin (an antifungal) to their tubes. The stock concentration is (50 mg/mL). The final concentration will be 50 µg/mL. ● • Calculate how much nystatin will be added to your TSA tubes. Each 15 mL TSA tube will get final concentration of 50 µg/mL. The …... will be used. Pipettor Blue Yellow Grey Volumes 100 - 1000 μL 10 - 100 μL 1-10 μL μL of nystatin to give a pipettor

1. A student weighs an empty special round bottom flask and stopper. He finds the mass to be 56.972 g. He then adds about 5 mL of an unknown liquid and heats the flask in a boiling water bath at 100°C. He allows all the liquid to vaporized and then removes the flask from the bath, stoppers it, and lets it cool. Upon cooling, he briefly removes the stopper, then replaces it and weighs the flask and condensed vapor, obtaining a mass of 57.917 g. The volume of the flask is known to be 240.2 mL. The barometric pressure in the laboratory that day is 743 mm Hg. What was the pressure of the vapor in the flask in atm? O 0.9776 atm 0.98 atm 0.978 atm 0.977 atm