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Sveta_85 [38]
3 years ago
13

A pesticide is used to kill crops in a field. A scientist wants to learn how the pesticide is affecting the plants and animals n

ear the field. Which procedure would be most useful? measuring the radioactivity of a sample of untreated pesticide introducing a radioactive tracer to common compounds in the soil subjecting the pesticide to neutron activation analysis introducing a radioactive tracer into a sample of pesticide
Chemistry
1 answer:
Nezavi [6.7K]3 years ago
8 0

Answer:

introducing a radioactive tracer into a sample of pesticide

Explanation:

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DNA methylation is process that cells undergo frequentlly to 'turn off'' gene expression A methyl group, which is a small spheri
Ann [662]

the answer is probably A. improper orientation of molecules

4 0
3 years ago
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when a number in scientific notation contains a significant zero, is that zero also significant in the expanded notation? give t
AlexFokin [52]
I believe you are referring zero as the exponent. <span>Any number (except 0) with exponent 0 is defined to mean 1.
</span>

For one thing, there is a rule: 

<span> a^m/ a^m = a^m-m = a^0

</span>But (when a is not equal to <span>0),
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a^m/ a^m = 1

Therefore, we must define a^0 as 1.

4 0
3 years ago
What is k in the rate law equation?
REY [17]

Answer:

B. A rate constant

Explanation:

The mathematical expression of rate law is given below,

Rate = K[A]m[B]n

This rate law show the relationship between the rate of chemical reaction and concentration of reactants.

In given equation [A] and [B] are molar concentration of reactants while K represent rate constant.

The value of K is specific for particular reaction at particular temperature,

m and n are represent exponents and determine experimentally. The value of K is not depend upon the concentrations of reactant but depend upon the surface area and temperature

5 0
2 years ago
Read 2 more answers
The process of chlorination in water treatment aims at ?​
Andrews [41]

Answer:

Chlorowanie wody jest procesem względnie tanim – koszt zbudowania samej instalacji do dezynfekcji, jak również koszt operacyjny wytworzenia 1 metra sześciennego uzdatnionej chlorem wody jest niższy od dezynfekcji wody za pomocą ozonu. Źródłem chloru w procesie dezynfekcji jest zazwyczaj podchloryn sodu, rzadziej dwutlenek chloru.

Explanation:

8 0
2 years ago
Why are moral or ethical questions NOT testable? A. They are questions that are impossible to answer. B. They are better answere
Radda [10]

Answer:

<u>C. The answers depend on people's opinions, not on observations.</u>

Explanation:

Morals are what people <em>think</em> is the right or wrong behavior and the <em>goodness</em> or <em>badness</em> of a character.

Ethics are <em><u>morals</u></em> that <em><u>govern</u></em> a person.

So the answer is C because these answers cannot be seen from the outside.

For example: A PERSONALITY TRAIT is something you can't really see. A PHYSICAL TRAIT is something you <em>can</em> see.

Ethics and morals are like personality traits.

5 0
3 years ago
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