Answer:
Here we have to find out to which compound is the addition of HBr more highly regioselective.
A reaction in which two or more products constitutional isomers, that means, the number of atoms present in each pair are same but have different arrangement are obtained but one is predominate over the other that type of reaction is called as the regioselective reaction.
Explanation:
Answer:
- <u>about 8,880 years old</u>
Explanation:
<em>Half-life</em> is the number of years it takes for a quantity of a substance to decompose in half.
You may measure the amount of the substance in mass, concentration, or activity, among others.
Thus, if you start with an amount A₀ of a substance that decays with a contstan half-life, the amount, A, remaining after passing n half-lives will be:
Then, if you know the initial amount,A₀, and the current amount remaining, A, of a substance, you can calculate the number of half-lives elapsed.
In this case:
- A = 5.22 disintegrations/minute·gram
- A₀ = 15.3 disintegratons/minut ·gram (when the organism was alive)
Thus:
- n × log(0.5) = log(0.34117647)
- n = log(0.34117647)/log(0.5)
Hence, about 1.55 half-lives have elapsed since the organism died.
Since the <em>half-life of C-14 is 5,730 years</em>, the bones are 1.55 × 5,730 = 8,881.5 ≈ 8,880 years old ← answer.
<h3><u>Answer;</u></h3>
1. In the light reactions, light energy is used to oxidize H2O to O2.
2. The electrons derived from this oxidation reaction in the light reactions are used to reduce NADP+ to NADPH.
3. The Calvin cycle oxidizes the light-reactions product NADPH to NADP+.
4. The electrons derived from this oxidation reaction in the Calvin cycle are used to reduce CO2 to G3P.
<h3><u>Explanation;</u></h3>
- <em><u>In the light reactions, light energy is used to remove electrons from (oxidize) water, producing O2 gas. These electrons are ultimately used to reduce NADP+ to NADPH.
</u></em>
- In the Calvin cycle, NADPH is oxidized back to NADP+ (which returns to the light reactions). The electrons released by the oxidation of NADPH are used to reduce three molecules of CO2 to sugar (G3P), which then exits the Calvin cycle.
- As ATP and NADPH are used in the Clavin cycle, they produce ADP and NADP+, respectively, which are returned to the light reactions so that more ATP and NADPH can be formed.
True the more collisions the more chance of a product being made
The answer should be d) 10, 12, 22
