The radioactive decay of uranium -238 in the earth's crust produces radioactive radon gas Rn-222 which escapes into the atmosphere is one common cause of background radiation.
The correct answer for the given statement above would be TRUE. It is true that chromatography separates gas or liquid solutions using a stationary phase. Chromatography is the separation of mixture <span>that distributes components to separate between two phases which includes stationary phase and the other is mobile phase. Hope this answer helps.</span>
Answer:
They make food by using chemosynthesis.
Explanation:
The statement which describes how NO2- reacts in this equilibrium:
<span>H2SO3(aq) + NO2-(aq) HSO3-(aq) + HNO2(aq
is the second option - </span><span>B. as a Brønsted-Lowry base by accepting a proton.
</span>This is because bases take proton H+ in order to become HNO2.
Answer: A. Phosphodiester bond.
Explanation: "A phosphodiester bond occurs when exactly two of the hydroxyl groups in phosphoric acid react with hydroxyl groups on other molecules to form two ester bonds. <u>Phosphodiester bonds are central to all life on Earth as they make up the backbone of the strands of nucleic acid."</u>
"The nucleotides in DNA and RNA have three components: a sugar group, a nitrogenous base, and a phosphate group.<u> Adjacent nucleotides in a nucleic acid are joined by a phosphodiester bond."
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