A student finds two unlabeled bottles room temperature that are either CO2 or H2. Based on their appearance alone how can they determine which substance is which. Do not answer with an activity that is more than looking at the bottles. I'm confused because they are both gases and colorless

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

we need the questions , i may then you.

elements make up everything, and they combine to make compounds.

the answer is c