Chemistry Midterm

A student measures several objects that consistently weigh 2kg less than what they should. How would you describe this scale?

• High accuracy, high precision
• High accuracy, low precision
• Low accuracy, high precision
• Low accuracy, low precision

A bowman is shooting arrows at a target. Which of the following demonstrates high accuracy but low precision?

• The bowman consistently hits the bullseye
• The bowman consistently hits to the right of the bullseye
• The bowman consistently hits around the target but never hits the bullseye
• The bowman consistently misses the target and hits a tree in the same spot

Which of these is an example of high precision?

• A student correctly calculates the mass of an object to be 54kg
• A student correctly calculates the acceleration due to gravity to be 9.8ms2
• A student tries to throw a pencil into the garbage can and makes it in
• An archer hits the same spot on the target three times in a row

Which of the following rules for counting Sig Figs is TRUE?

• Leading Zeros are ALWAYS significant (0.0053)
• Sandwich Zeros are ALWAYS Significant (24006.2)
• If there is a Decimal Point, then Ending Zeros are NEVER Significant (252.60)
• If there is Not a Decimal Point, then Ending Zeros are ALWAYS Significant (84500)

How many Sig Figs are in the following number: 0210.05

• 6
• 5
• 4
• 3

How many Sig Figs are in the following number: 70900

• 5
• 4
• 3
• 2

Round the Following Number to 3 Sig Figs: 0.0001505

What is 9.571 × 10^2 in standard notation?

• 9.571
• 95.71
• 957.1
• 9571

What is 7 in scientific notation?

• 7 × 10^0
• 7 × 10^-1
• 7 × 10^-2
• 7 × 10^-3

What is 6 × 10-1 in standard notation?

• 0.0006
• 0.006
• 0.06
• 0.6