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Tanya [424]
2 years ago
5

At 25 °C the rate constant for the first-order decomposition of a pesticide solution is 6.40 x 10-3 min-1. If the starting conce

ntration of pesticide is 0.0314 M, what concentration will remain after 62.0 min?
Biology
1 answer:
Svet_ta [14]2 years ago
3 0

Answer:

0.0211 M concentration of pesticide will remain after 62.0 min.

Explanation:

Initial concentration of the pesticide = [A_o]=0.0314 M

Final concentration of the pesticide after t time = [A]=?

t = 62.0 minutes

Rate constant of the reaction = k = 6.40\times 10^{-3} min^{-1}

For the first order kinetics:

[A]=[A]_o\times e^{-kt}

[A]=0.0314 M\times e^{-6.40\times 10^{-3} min^{-1}\times 62.0 min}

[A]=0.0211 M

0.0211 M concentration of pesticide will remain after 62.0 min.

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frez [133]

Answer:

A sperm cell

Explanation:

A diploid cell has 46 chromosomes which is normally signified by somatic cells. Germ cells or gametes are haploid cells therefore they contain only 23 chromosomes. Male gamete contains 22 autosomes and one sex chromosome. That sex chromosome can be X or Y.

Female gamete does not have Y chromosome as a sex chromosome, it has only X chromosome as a sex chromosome. So Y chromosome in a human cell which have 22 autosomes determines that it is a male gametic cell or a sperm cell. Sperm cells that have a Y chromosome if fuses with female gamete produce male offspring(XY).  

So the correct answer is- a sperm cell.

5 0
2 years ago
What can you infer about a species that has a random pattern of distribution over space? A uniform pattern?
Leona [35]

The individual organisms that frame a population are additional or less equally spaced, spread every which way with no predictable pattern, or clustered in teams. These are called the uniform, random, and clumped dispersion patterns.   Uniform refers to the evenly distributed population, random means random spacing and clumped shows the distribution in clusters.

Food supply and resources are directly proportional to a particular distribution pattern. Random distribution occurs when several pollen grains of some flowers were carried by wind or bees. These flowers will then bloom where they were scattered.

hope this um ... helps hehe ........

7 0
2 years ago
A gardener is concerned that her greenhouse is getting too hot from too much light, and seeks to shade her plants with colored t
valkas [14]
<span>In getting her plants to grow, the gardener should use the color blue for her colored translucent sheets. The reason for this is because it will be absorbed by the plants, causing them to get the light absorption that they so desperately need. Other colors, such as green, are absorbed into plants (as can be observed by their green colors), and thus they do not absorb the light through this color.</span>
5 0
2 years ago
DNA and RNA both contain a ___-carbon sugar.
ipn [44]
<span>DNA and RNA both contain a five-carbon sugar.

</span><span>Hope that helps! ★ <span>If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia </span></span>
8 0
2 years ago
Read 2 more answers
Read the following paragraph. Then rewrite it to make it represent good human relations skills.
34kurt

Answer:

Bart was 16 years old when he moved to New Jersey. He was not happy there were very few kids his age in his new neighborhood. During the winter, he noticed that his elderly neighbor, Mr. Jones, was attempting to remove snow from his sidewalk. Bart ran over to Mr. Jones and offered to help him. When summer came, Bart wanted to go swimming in Mr. Jones' pool, and the elderly neighbor smiled and allowed him, with pleasure.

Explanation:

This is a good example of a Life Skills question, where you are being questioned on what is the correct way to deal with people in certain situations. If Bart had helped the elderly neighbor, he would have a positive interaction with him, meaning that he would then not be afraid to approach him in summer.

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2 years ago
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