Honors Chem Unit 2 - Midterm Exam Review - 24-25

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

Back

Count all non-zero digits, any zeros between them, and trailing zeros in a decimal number. Leading zeros are not counted.

Front

What is the rule for addition and subtraction regarding significant figures?

Back

The result should have the same number of decimal places as the measurement with the least decimal places.

Front

What is the rule for multiplication and division regarding significant figures?

Back

The result should have the same number of significant figures as the measurement with the least significant figures.

Front

Calculate the significant figures in the result of 1.01 + 4.7.

Back

The answer has 2 significant figures.

Front

Calculate the significant figures in the result of 14.53 - 2.001.

Back

The answer has 4 significant figures.

Front

Perform the operation (3.2 x 10^16) ÷ (2.0 x 10^2) and express in scientific notation.

Back

The answer is 1.6 x 10^14.

Front

Calculate the significant figures in the result of 3.41 x 12.8.

Back

The answer has 3 significant figures.

Front

Calculate the significant figures in the result of 11.0 / 2.3.

Back

The answer has 2 significant figures.

Front

What is scientific notation?

Back

Scientific notation is a way of expressing numbers as a product of a coefficient and a power of ten, making it easier to handle very large or very small numbers.