Chemistry Midterm 2024

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 4004?

Back

4

Front

What are the positive particles of an atom called?

Back

Protons.

Front

What is the mass conversion from grams to kilograms for 25 grams?

Back

0.025 kilograms.

Front

What does precision refer to in measurements?

Back

Precision describes how close measurements are to each other, regardless of whether they are accurate.

Front

What is the difference between accuracy and precision?

Back

Accuracy refers to how close a measurement is to the true value, while precision refers to how consistent measurements are with each other.

Front

Convert 3 kilometers to meters.

Back

3 kilometers is equal to 3,000 meters.

Front

What is the formula to convert grams to kilograms?

Back

To convert grams to kilograms, divide the number of grams by 1000.

Front

What is the definition of a proton?

Back

A proton is a positively charged particle found in the nucleus of an atom.

Front

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

Back

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