When 944g of Calcium Is Heated in Air,13

question 96

Multiple Choice

When 9.44g of calcium is heated in air,13.22g of calcium oxide is formed.What is the percent by mass of oxygen in this compound?

• A)28.6%
• B)40.0%
• C)71.4%
• D)13.2%

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Definitions:

Standard Deviation

The average amount of variability in a set of scores or the scores’ average deviation from the mean.

Compute Mean

The process of calculating the arithmetic average of a set of numbers by summing them up and dividing by the count of numbers.

Predictors

Variables used in regression analysis to forecast the value of an outcome variable.

Independent Variable

An independent variable is a variable that is manipulated or changed in an experiment to test its effect on a dependent variable.