In the carbon-oxygen cycle, carbon dioxide is used for and oxygen is used for
respiration, photosynthesis
ozone, respiration
photosynthesis, respiration
evaporation, condensation

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots