Chem Final

When recording a measurement, what should you do?

• Record known values and estimate one more place

• Record only the known values

• Estimate all values

• Record values without estimation

What is the formula for percent error?

• (experimental value - actual value) / actual value x 100

• (actual value - experimental value) / actual value x 100

• (experimental value + actual value) / actual value x 100

• (actual value + experimental value) / experimental value x 100

What is the rule for determining significant digits for non-zero numbers?

• All non-zero numbers are not significant.

• All non-zero numbers are significant.

• Only even non-zero numbers are significant.

• Only odd non-zero numbers are significant.

How many significant figures are in the number 12.05?

• 2

• 3

• 4

• 5

When adding or subtracting, to what should you round the answer?

• To the nearest whole number

• To the place value of the least precise measurement

• To the nearest tenth

• To the nearest hundredth

What is the correct answer for the multiplication of 4.75 m and 2.5 m?

• 11.875 m²

• 12 m²

• 11 m²

• 13 m²

In scientific notation, what does a negative exponent indicate?

• A number greater than one

• A number less than one, but greater than zero

• A number equal to one

• A number less than zero

Determine the number of significant figures in the measurement 61.40 cm.

• 2

• 3

• 4

• 5

Determine the number of significant figures in the measurement 4052 mL.

• 2

• 3

• 4

• 5

Determine the number of significant figures in the measurement 84,000. m.

• 2

• 3

• 4

• 5