chapter 2 quizizz - chem final

Numbers are usually written so that the uncertainty is in the last reported digit.

• true

• false

The decimal number 0.0000010 expressed in scientific notation is 1.0 * 10⁶

• true

• false

The mass of an object, 4.55 * 10^-3 g, expressed in decimal notation is 0.000455 g.

• true

• false

Zeros located after a number and after a decimal point are significant.

• true

• false

The number 4,450,000.0 has 3 significant figures.

• true

• false

The correct scientific notation for the number 500.0 is:

• 5 * 10²

• 5.00 * 10²

• 5.000 * 10²

• 5 * 10^-2

The correct number of significant figures in the number 865,000 is:

• 3

• 6

• 4

• ambiguous

In the number 48.93, which digit is estimated?

• 4

• 8

• 9

• 3

There are exactly 2.54 centimeters in 1 inch. When using this conversion factor, how many significant figures are you limited to?

• 1

• 3

• ambiguous

• infinite number of sig figs

Which of the following statements is NOT part of the rules for determining sig figs?

• Non-zero digits at the end of a number are not significant.

• Zeros between two numbers are significant.

• Zeros to the left of the first non-zero number are not significant.

• Trailing zeros at the end of a number, but before an implied decimal point are ambiguous.