Carbon exists in many forms on Earth. The diagram shows part of the carbon cycle. What does this diagram show? A. It shows how matter can pass through an ecosystem.

B. It shows each step in the correct order that carbon must pass through.

C. It shows how more carbon is constantly being formed and passed along.

D. It shows how carbon is running out because it is all being used up by animals.

Pleas

It is important to wear proper protective equipment in lab even when not actively performing experiments because accidents can affect any researcher, even one not working on an experiment. select the best answer from the choices provided

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

Which of the following units is not an official si unit