QW1 - Measurement Review (CHEM)

Front

What are significant figures?

Back

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

How many significant figures are in the number 789?

Back

3

Front

How many significant figures are in the number 0.003?

Back

1

Front

How many significant figures are in the number 2300?

Back

2

Front

What is scientific notation?

Back

Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form. It is written as a product of a number between 1 and 10 and a power of 10.

Front

Convert to scientific notation: 1.75 x 10^-6

Back

0.00000175

Front

Convert to scientific notation: 1.963 x 10^-2

Back

0.01963

Front

What is the purpose of using significant figures in measurements?

Back

The purpose of using significant figures is to communicate the precision of measurements and calculations, ensuring that the uncertainty in the measurement is properly represented.

Front

How do you determine the number of significant figures in a measurement?

Back

To determine the number of significant figures, count all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion. Leading zeros are not counted.

Front

What is the significance of trailing zeros in a decimal number?

Back

Trailing zeros in a decimal number are significant because they indicate the precision of the measurement.