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Irina-Kira [14]
2 years ago
5

Which of the following statements holds true for a chemical change?

Chemistry
1 answer:
Maksim231197 [3]2 years ago
8 0
C, I think about it as the chemical structure is changing
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13 Apply Place a check mark in the box to indicate
Sergio039 [100]

Answer:

A. ✔️Substitution

B. ✔️Insertion

C. ✔️Deletion

Explanation:

In A, the type of mutation that is shown is Substitution. In B, the type of mutation shown is Insertion and in C, the type of mutation shown is Deletion.

Mutation refers to the change in the DNA sequence. This occurs in an organism. In gene mutation, the structure of DNA molecule changes and produces a different allele of a gene. While in chromosome mutation, there is the change in the structure or number of the whole chromosomes in a particular cell.

Actually, mutations can take place both in prokaryotic cell and in eukaryotic cell.

In genetics, there are: Substitution, Insertion and Deletion mutations.

Substitution mutation is an exchange of one base for another. Insertion mutation is simply addition of one or more nucleotide pairs in a DNA sequence while Deletion mutation refers to the situation in which a sequence of DNA is left out when there is DNA replication.

7 0
3 years ago
Read 2 more answers
The drug labetalol has a dose of 300 mg and is administered in 300 mL of an intravenous infusion at a rate of 2 mg/min. Using an
Evgesh-ka [11]

Answer:

Explanation:

From the given information:

Since 300 ml of intravenous infusion contains 300 mg of drugs;

Then; 1 ml of intravenous infusion contains (x) amount of drugs

(x) amount of drugs = (300 mg × 1 ml)/ 300 ml

(x) amount of drugs = 1 mg.ml

To calculate the drip rate in drops/minutes by applying conversion factors.

rate (\dfrac{ in \ drops }{minute })= \dfrac{2 \ mg }{min } \times \dfrac{20 \ drops}{1 \ ml} \times \dfrac{1 \ ml }{1 \ mg }

rate (\dfrac{ in \ drops }{minute }) = 40 \  drops / min

4 0
3 years ago
The chemical symbol for sodium is <br> a. na. <br> b. n. <br> c. s. <br> d. sn.
gayaneshka [121]
The chemical symbol for sodium is Na
8 0
4 years ago
If a gas is cooled from 315K to 231K and the volume is kept constant, what would the final pressure be if the original pressure
goblinko [34]

Answer:

455.4 mmHg

Explanation:

To solve this problem we can use <em>Gay Lussac's Law</em>, which describe the temperature and pressure of a gas, at constant volume and composition:

  • P₁T₂ =  P₂T₁

In this case:

  • P₁ = 621 mmHg
  • P₂ = ?
  • T₁ = 315 K
  • T₂ = 231 K

We <u>input the data</u>:

  • 621 mmHg * 231 K = P₂ * 315 K

And <u>solve for P₂</u>:

  • P₂ = 455.4 mmHg
5 0
3 years ago
6. The fusion of 4 H-1 nuclei to produce two positrons and one other nuclei.​
KIM [24]

Explanation:

Normally, fusion involves two heavy hydrogen nuclides but since we have 4 light hydrogen nuclides, two of which underwent positron emission, thus changing two protons into neutrons plus 2 positrons and 2 neutrinos. The resulting nucleus from this fusion reaction is an He-4 nucleus.

3 0
3 years ago
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