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3 years ago

Which statement describes an example of gene therapy?

Chemistry

1 answer:

OLEGan [10]3 years ago

8 0

Answer:

The correct answer is A defective gene is replaced with a normal gene.

Explanation:

Gene therapy is an alternative therapy for the treatment of some diseases.

Although this therapy is still in development, and carries many risks, it is expected to have very good results in the coming years.

In such therapy the following happens:

a defective gene is replaced with a normal gene.
the introduced gene matches the defective one or produces a beneficial protein.
faulty genes are disabled.

Given this information we can say that the correct answer is A defective gene is replaced with a normal gene

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Balance the following KMnO4 + HCl = KCl + MnCl2 +H2O + Cl2

Vadim26 [7]

2KMno4+16hcl=2kcl+2mncl2+8h2o+5cl2

6 0

3 years ago

As a result of the transfer of an electron from a less electronegative atom to a more electronegative atom,

Viktor [21]

<u>Answer:</u> The correct answer is Option d.

<u>Explanation:</u>

Electronegativity is defined as the tendency of an element to attract the shared pair of electron towards itself in a compound.

When electron is transferred from less electronegative atom to more electronegative atom.

The atom which is more electronegative gains electron and undergoes reduction reaction.

Reduction reaction is defined as the reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.

$X^{n+}+ne^-\rightarrow X$

During the transfer of electrons, energy is released when an electron looses is potential energy during the transfer.

Hence, the correct answer is Option d.

4 0

3 years ago

How much oxygen will contain the same number of atoms as the number of molecules in 73 g of HCI?

expeople1 [14]

Answer:

64g of O2.

Explanation:

We'll begin by calculating the number of molecules in 73g if HCl.

This is illustrated below:

From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02×10²³ molecules. This implies that 1 mole of HCl also contains 6.02×10²³ molecules

1 mole of HCl = 1 + 35.5 = 36.5g

Thus, if 36.5g of HCl contains 6.02×10²³ molecules, then 73g of HCl will contain = (73 x 6.02×10²³)/36.5 = 1.204×10²⁴ molecules.

Therefore, 73g of HCl will contains 1.204×10²⁴ molecules.

Now, we shall determine the mass of oxygen that will contain 1.204×10²⁴ molecules.

This can be obtained as follow:

1 mole of O2 = 16x2 = 32g

32g of O2 contains 6.02×10²³ molecules.

Therefore, Xg of O2 will contain 1.204×10²⁴ molecules i.e

Xg of O2 = (32 x 1.204×10²⁴)/6.02×10²³

Xg of O2 = 64g

Therefore, 64g of O2 will contain the same number of molecules (i.e 1.204×10²⁴ molecules) in 73g of HCl.

5 0

3 years ago

Could you have identified a physical property of a substance before you performed the activity? Explain.

sasho [114]

You could identify a physical property of a substance before you performed the activity because the characteristics of a material known as its physical qualities are those that may be investigated independently of the substance's chemical makeup.

This is further explained below.

<h3>What is physical property?</h3>

Generally, Any attribute that can be measured and has a value that can be used to describe the state of a physical system is considered to be a physical property.

In conclusion, The changes that take place in a system's physical attributes may be utilized to provide a description of the transitions that take place between its momentary states.