Below are some common errors for different question types.

## General

- Make sure you follow any special instructions given in the question. Some questions may ask for a certain number of significant figures, the states of matter in a chemical formula, etc.
- Make sure you have answered every part of the question. Some questions have more than one part. You must answer every part of the question correctly when you click
**Check Answer**to receive full credit.

Text Entry

- Make sure your spelling is correct. Incorrectly spelled answers will always be graded incorrect.

Chemical Equation Entry

- If there are rules about the case of letters in your answer, make sure your answer is capitalized correctly. For example, "CO" is carbon monoxide, which is not the same thing as "Co" cobalt.
- Make sure you follow subscript and superscript rules. For example, when written correctly, the formula for water should appear as H
_{2}O not - Make sure you have not used zero in place of an "o" or vice versa. For example, when written correctly, the formula for water should appear as H
_{2}O not_{2}0.

## Mathematical Equation Entry

- Answers are case-sensitive. For example, "A" will be graded differently than "a".
- If there are multiple terms in the denominator of a fraction, you may need to enclose the entire denominator in parentheses. For example x/(y+z) is not the same as x/y+z. Alternatively, you can omit the parentheses by using a stacked fraction.

Numeric Entry

- Make sure you have rounded correctly.

Multiple Select

- Multiple select questions may have more than one correct choice, you must select all of the correct choices to receive credit.

- Some labels may be used more than once. You must use each label as many times as necessary to identify the parts of the module correctly and receive credit.