1. Lab Practical Practice *use correct number of significant figures when solving!

2. Lab Practical Practice Significant Figures – numbers that are part of a measurement. How many significant figures are in the numbers below? 1.004503,450,0006,000. 0.00340.00340010,000.00

3. Lab Practical Practice Solve the following: Significant Figures in calculations. 110 m x 6 m = 345.6 g. + 34.567 g. = (135.778 mL – 23.74 mL) / 456.6784 g. =

4. Lab Practical Practice A gas cylinder having a volume of 10.5L contains 36.8g of gas. What is the density of the gas?

5. Lab Practical Practice Calculate the volume of 25.0 g of each of the following using the table above. – Mercury – Oxygen – Water SubstancePhysical StateDensity (g/mL) OxygenGas0.00133 WaterSolid1.000 MercuryLiquid13.6

6. Lab Practical Practice When you are using a four beam balance, what should your measurement go to when using certain and uncertain digits? What about a three beam balance?

7. Lab Practical Practice When using a 100mL graduated cylinder to measure volume, in what place should the uncertain digit be in? (the graduated cylinder increases by ones)

8. Lab Practical Practice Sally measures a liquid in a 100mL graduated cylinder during a lab. She reads it as 23.mL. Is this an accurate measurement? If not, what is wrong and how would you correct it?

9. Lab Practical Practice Danny needs to use the four beam balance to measure a block of zinc. How should he go about doing this? (be specific)

10. Lab Practical Practice Let’s say you had to find the density of a bouncy ball. All you have set before you are a graduated cylinder and a four beam balance. What are some possible errors that occur while performing the lab?