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The air exhaled from the lungs of a smoker has a concentration of 24 ppm co. express the concentration as a percent.

1. explain hydrogen peroxide, h 2 o 2 properties and decomposition reaction. 2. describe how each of the following natural cycles plays a part in earth’s climate system. (a) the water cycle (b) the carbon cycle

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles