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statuscvo [17]
2 years ago
11

A mutation occurs in a cell. Which sequence best represents the correct order of the events involved for this mutation to affect

the traits expressed by this cell
Chemistry
1 answer:
Eva8 [605]2 years ago
6 0

Answer: A change in the sequence of DNA bases--> Joining amino acids in sequence --> Appearance of characteristics

Explanation:

A mutation is a permanent shift or change from the normal DNA sequence that makes up a gene and affect traits which makes the sequence becomes different from what is commonly found in people. Mutations vary from distortion of a single DNA building block to a large segment of a chromosome.

When mutation occurs in a cell, for the mutation to affect the traits expressed by the particular cell, it must follow this sequence directly:

A change in the sequence of DNA bases--> Joining amino acids in the sequence --> Appearance of characteristics.

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Sodium carbonate (Na2CO3) is available in very pure form and can be used to standardize acid solutions. What is the molarity of
NeX [460]

Answer:

Molarity of HCl = 0.19 M

Explanation:

Moles of Na_2CO_3:-

Mass = 0.246 g

Molar mass of Na_2CO_3 = 105.988 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{0.246\ g}{105.988\ g/mol}

Moles_{Na_2CO_3}= 0.002321\ mol

According to the given reaction:-

Na_2CO_3+2HCl\rightarrow 2NaCl+H_2O+CO_2

1 mole of Na_2CO_3 react with 2 moles of HCl

0.002321 mole of Na_2CO_3 react with 2*0.002321 moles of HCl

Moles of HCl = 0.004642 moles

Given that volume = 24.3 mL

Also,  

1\ mL=10^{-3}\ L

So, Volume = 24.3 / 1000 L = 0.0243 L

Considering:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Molarity=\frac{0.004642}{0.0243}

<u>Molarity of HCl = 0.19 M </u>

<u></u>

7 0
2 years ago
Which polyatomic ion is found in the compound represented by the formula NaHCO3?
olga nikolaevna [1]

Answer is (2) - hydrogen carbonate


<em>Explanation:</em>


NaHCO₃ is an ionic compound which is made from Na⁺ and HCO₃⁻ ions. The decomposition is

NaHCO₃ → Na⁺ + HCO₃⁻


Among the resulted ions, Na⁺ is a monatomic ion while HCO₃⁻ is a polyatomic ion.


<em>Polyatomic ions mean ions which are made of two or more different atoms.</em>


HCO₃⁻ is made from 3 atoms as H, C and O. The name of HCO₃⁻ ion is bicarbonate or hydrogen carbonate.

8 0
2 years ago
A chemical compound mixture of carbon and one or more elements from the halogen series of elements is known as ____.
Ilya [14]
The correct answer is a salt.
5 0
2 years ago
Propose a plausible mechanism for the reaction f2 + 2clo2 → 2fclo2 given that the rate law for the reaction is rate = k[f2][clo2
shepuryov [24]

<u>The given reaction is:</u>

F2 + ClO2 → 2FClO2

Rate = k[F2][ClO2]

<u>Explanation:</u>

The possible mechanism for this reaction can be broken down into two steps with the slow step being the rate determining step

Step 1:       F2 + ClO2 → FClO2 + F ----------- Slow

Step 2:      F + ClO2 → FClO2           ----------- Fast

-----------------------------------------------------------

Overall:  F2 + 2ClO2 → 2FClO2

Rate = k[F2][ClO2]

 


8 0
2 years ago
Read 2 more answers
Charlie is frying an egg in a pan located over a gas burner. He develops a model to determine the energy produced by the flame i
frosja888 [35]

Answer: B.)

Explanation:  Heat flows from pan to sounroundings

8 0
2 years ago
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