Chemical Formulas 1. What does the subscript 2 stand for following the H in H2O?

2. List the atoms that would be found in a molecule of CO2.

3. Why are models used to explain the composition of substances?

4. What can models show us specifically about the makeup of substances on the atomic level?

5. Why are formulas used to describe substances?

6. What does the formula tell us about a substance?

1.2 stands for 2 atoms of hydrogen and 1 atom of oxygen

2.carbon and oxygen

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6.

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.