Which is a noble gas? A. oxygen

B. chlorine

C. fluorine

D. helium

Embryos of different species look very similar, which shows that the organisms share a ancestor.

If you want to create an electrical current, which situation would produce a solution capable of this

Select the correct answer. when carbon dioxide dissolves in water, it sometimes reacts with water to form carbonic acid as in this balanced equation: co2 + h2o → h2co3. if 495 milliliters of carbon dioxide at 25°c and 101.3 kilopascals reacts with excess water, what is the theoretical yield of carbonic acid? use the periodic table and the ideal gas resource a. 0.889 g b. 1.10g c. 1.27g d. 2.02g what's the answer! quick!