Atoms of which three elements could bond together to form an organic compound? a. oxygen, iron, and carbon

b. carbon, hydrogen, and oxygen

c. oxygen, hydrogen, and nitrogen

d. carbon, iron, and nitrogen

If someone could do the first couple, just so i can see how it's done that would be great! 20 points. complete a dichotomous key for the 10 leaves on the common leaves sheet. the chart provided here allows for 11 pairs of statements. depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.

Nucleic acid certain protein cell membranes certain carbohydrates

Reactants undergo chemical reaction to form products. this chemical equation represents one such reaction. the coefficient for one of the reactants or products is incorrect. which part of the chemical equation is incorrect?