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

Front

What is scientific notation?

Back

A way of expressing numbers that are too large or too small to be conveniently written in decimal form, using powers of ten.

Front

How do you perform division in scientific notation?

Back

Divide the coefficients and subtract the exponents of the powers of ten.

Front

What is the significance of significant figures?

Back

They indicate the precision of a measurement and help convey the certainty of the data.

Front

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

Back

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

Front

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

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 significant figures in multiplication and division?

Back

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

Front

Perform the operation: (3.2 x 10^16) ÷ (2.0 x 10^2). What is the answer in scientific notation?

Back

1.6 x 10^14.

Front

Perform the operation: (43.05 x 10^52) - (10.2 x 10^52). What is the answer in scientific notation?

Back

3.29 x 10^53.

Front

Perform the operation: (7.50 x 10^15) + (7.542 x 10^15). What is the answer in scientific notation?

Back

1.504 x 10^16.

Front

How many significant figures are in the answer to 1.01 + 4.7?

Back

2.