Please help me with this question (Chemistry -- Stoichiometry)

The DNA from two different kinds of organisms can be combined through recombinant DNA technology.

Deoxyribonucleic acid (DNA) is defined as the hereditary material that has the ability to transfer genetic material from a parent cell to its offspring.

The Deoxyribonucleic acid of a particular organism can be transferred to another organisms through the recombinant DNA technology.

Therefore, the concept that is used to combine the DNA of two different organisms is the recombinant DNA technology which inserts into a host organism another DNA, to produce new genetic combinations that are of value to science, medicine, agriculture, and industry.

Learn more about Deoxyribonucleic acid here:

https://brainly.com/question/21265857

#SPJ1

Answer:

2.04 moles

Explanation:

1 liter = 1 [tex]dm^{3}[/tex]

and at S.T.P (standard temperature and pressure) one mole of any gas occupies 22.414 [tex]dm^{3}[/tex]

setting up mole and volume ratio

moles   :   volume

   1        :    22.414

   X       :    45.8

X = 45.8/22.414

X = 2.04 moles

If a sample has an initial mass of 4.48 grams and undergoes decay until it has a mass of 0.140 grams, then option b 3 half-lifes  passed

The half-life of a substance is the amount of time it takes for half of the initial sample to decay. For cobalt-60, the half-life is 5.26 years. This means that if we start with 4.48 grams of cobalt-60, half of that (2.24 grams) will remain after 5.26 years.

The remaining 2.24 grams will then decay until half of that (1.12 grams) remains after another 5.26 years. Continuing this pattern, we can see that after 3 half-lives (15.78 years), we will be left with 0.140 grams of cobalt-60. Therefore, the sample underwent decay for 3 half-lives.

Half-life, in chemistry, is the time required for half of the original number of radioactive atoms in a sample to decay. The half-life of a radioactive substance is a measure of the stability of the nucleus of the atom.

Learn more about half-lives:

https://brainly.com/question/24710827

https://brainly.com/question/16980763

Answer:

Explanation:

An acid is a substance that can donate protons (H+) to water when dissolved in it, resulting in an increase in the concentration of H+ ions in the solution.

When NaCl (sodium chloride) is dissolved in water, it dissociates into its individual ions, Na+ and Cl-. These ions do not donate protons to water, so NaCl does not form an acid when dissolved in water.

NO2 (nitrogen dioxide) is a neutral compound, it does not donate protons to water and does not form an acid when dissolved in water.

H2SO3 (sulfurous acid) is an acid, when dissolved in water, it donates protons to water and forms H+ ions and SO3- ions.

HCl (hydrochloric acid) is an acid, when dissolved in water it donates protons to water and forms H+ ions and Cl- ions.

So the answer is H2SO3 and HCl are the compounds that would form an acid when dissolved in water as an aqueous solution.

The number of mole in 452 grams of sulphur is 14.125 mole

The number of mole in a substance is defined as the ratio of mass to the molar mass of the subtance. This is illustrated below:

Mole = mass / molar mass

Applying the above formula, we can determine the number of mole in 452 grams of sulphur. Details below

Mole = mass / molar mass

Number of mole of sulphur = 452/ 32

Number of mole of sulphur = 14.125 mole

Thus, the number of mole is 14.125 mole

Learn more about mole:

https://brainly.com/question/13314627

#SPJ1

1.50x10 ⁻¹ m glucose solution made by dissolving the glucose in 100.0 kg of water is 15 mole of glucose.

The term molarity defined as the moles of a solute per liters of a solution.  It is denoted by symbol (M).

1.50x10 ⁻¹ m glucose solution contain 1kg of water

Therefore, 100 kg of of water contain ( 1.50x10 ⁻¹ × 100)

= 15 mole of glucose

According to definition of molarity of solution

2.60x10⁻² m Na₂CrO₄ in 1 kg of water

Therefore, 2.60x10⁻² m Na₂CrO₄ in 1000.0 g of water = 2.60x10⁻² m Na₂CrO₄

1kg or 100gram of water contain 1.00×10⁻¹ m urea

Therefore, 500.0gram of water contain 1.00×10⁻¹/1000 ×500

= 0.05 mole of urea

Thus, 1.50x10 ⁻¹ m glucose solution made by dissolving the glucose in 100.0 kg of water is 15 mole of glucose.

To learn more about molarity, follow the link;

https://brainly.com/question/8732513

#SPJ1

Using Nernst equation, the pH of the unknown solution is 2.99

The pH of an unknown solution can be calculated by using the Nernst equation, which relates the cell potential (emf) to the concentrations of the species involved in the half-reaction. The Nernst equation for the hydrogen electrode is as follows:

E = E₀ + (0.05916/n) * log(H+)

Where:

Given that the pressure of H₂(g) was maintained at 1atm, we can assume that the concentration of H⁺ is equal to the concentration of H₃O⁺ in the unknown solution.

Rearranging the equation we get:

pH = -log(H⁺) = (E - E₀) / (0.05916/1)

Substituting E = 0.4188 V and E₀ = 0.2415 V we get:

pH = (0.4188 - 0.2415) / (0.05916/1) = 2.996

Therefore, the pH of the unknown solution is 2.99.

Learn more on Nernst Equation here;

https://brainly.com/question/15394851

#SPJ1

Answer: A point or an object moving in a straight line is accelerated if it speeds up or slows down.

Explanation:  Motion on a circle is accelerated even if the speed is constant, because the direction is continually changing. For all other kinds of motion, both effects contribute to the acceleration.

In plate tectonics, lithosphere which is made up of the crust and upper mantle—is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere.

Plate tectonics is a scientific theory that explains how major landforms are created as a result of Earth’s subterranean movements. The theory, which solidified in the 1960s, transformed the earth sciences by explaining many phenomena, including mountain building events, volcanoes, and earthquakes.

In plate tectonics, Earth’s outermost layer, or lithosphere—made up of the crust and upper mantle—is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere. Due to the convection of the asthenosphere and lithosphere, the plates move relative to each other at different rates, from two to 15 centimeters (one to six inches) per year.

Learn more about plate tectonics,here:

https://brainly.com/question/19317822

#SPJ1

Explanation: When C

6

​

H

5

​

CH₂NH

2

​

 reacts with HNO

2

​

, the product will be C

6

​

H

5

​

CH

2

​

OH.

The chemist weighed out 0.2 moles of aluminum.

To calculate the number of moles of aluminum, we need to use the formula:

moles = mass / molar mass

The molar mass of aluminum is 27 g/mol. Therefore, the number of moles of aluminum in 5.4 g can be calculated as:

moles = 5.4 g / 27 g/mol = 0.2 (mol)

So the chemist weighed out 0.2 moles of aluminum.

It is important to note that the number of moles should have the same number of significant digits as the mass measured.

For a cylinder containing 7.00 grams of helium and a moveable piston. If the capacity was adjusted from 8 l to 12.7 l, the ultimate quantity of moles inside the cylinder would be 11.110 l.

Describe a cylinder?

The three-dimensional shape of a cylinder is made up of two parallel round base connected by a curved surface. The right cylinder is formed when the circular bases' centres cross each other. Right cylinders have parts that are parallel to the planes that include the bases; otherwise, they are referred to as oblique cylinders.

A round cylinder is what?

The circular cylinder is a cylinder with circular bases that are parallel to one another. Three dimensions are involved.

To know more about cylinder visits :

brainly.com/question/16134180

#SPJ1

Answer:

To find the number of moles in 78.3 grams of ammonium sulfite, you would divide the mass by the molar mass of the substance. The molar mass of ammonium sulfite is (14.0067 + 14.0067 + 32.065 + 64.0638) g/mol = 124.1472 g/mol.

78.3 g / 124.1472 g/mol = 0.63 moles

Explanation:

Answer:

0,6746 moles of ammonium sulfite

Explanation:

(NH₄)₂SO₃  - ammonium sulfite [tex]\equiv \, N_2H_8SO_3[/tex]

Atomic weight of each element:

N = 14.00 * 2  = 28

H = 1.00   * 8  = 8

S = 32.065 * 1 = 32.065

O = 16 * 3 =  48

Total atomic weight = 28 + 8 + 32.065 + 48

Total atomic weight = 116,065 gr/mol

[tex]78.3\,g \,* \frac{1mol\,of\, (NH_4)_2SO_3}{116.065g \, \,of \, (NH_4)_2SO_3 } \approx 0,6746\, moles \, of \, (NH_4)_2SO_3[/tex]

Answer:

The answer to this reaction would be C-C-OH + H2.

Magnesium is less reactive than the elements of group 1.

Before we get into the question, it is good that we know what we mean by reactivity in chemistry. When we use the term reactivity, we are trying to look at how two or more substances can be able to combine together.

We know that the reactivity of the metals would depend on the position of the metals in the electrochemical series as well as the position of the metal  in the perioidic table of the elements.

Given that the atoms of the elements that we have in group 1 are more electro positive than magnesium, they are going to be much more reactive than the element magnesium and this is evidence by the reduction potentials of the elements that we can easily see from the standard tables.

Learn more about reactivity:https://brainly.com/question/1598581

#SPJ1

In the identities, the first response when approaching a victim is immediately calling 911. The correct option is B.

If delaying treatment could endanger your life or a portion of your body, it is an emergency. An emergency can be brought on by a bad accident or a sudden acute sickness.

Other situations include active labor and excruciating pain. No matter where you are or which hospital you visit, your health plan must cover emergency care.

Calling 911 is the best option to do when there is an emergency, and you see a victim.

Therefore, the correct option is B. Immediately call 911.

To learn more about an emergency, refer to the link:

https://brainly.com/question/13004123

#SPJ1

Answer:  The correct answer is to Evaluate the situation.

Explanation:  This answer has been confirmed correct.

When you first discover someone that needs assistance, you should immediately evaluate the situation. If the person is conscious and alert, then you should ask their permission to help them. If they are not conscious or alert, you should then call 911.

The pressure inside the beaker and the sealed tank are the same, so the liquid level in the beaker will remain the same.

The temperature inside the beaker and the sealed tank are also the same, so there will be no change in the amount of liquid in the beaker due to evaporation or condensation.

Therefore, after ten minutes, there will be the same amount of liquid in the beaker.

You may therefore simply clean the lens with a microfiber cloth to fix your blurry backup camera.

To learn more about camera refer

https://brainly.com/question/26320121

#SPJ1

One common example of homolytic cleavage is when water (H20) molecules split into hydrogen (H202) and oxygen (02) radicals.

One well-known example of heterolytic cleavage is the decomposition of water into hydrogen and oxygen gases.

Cleavage of heterolytic bonds also known as heterolysis. When a bond is broken, the products experience an uneven distribution of the bonding electron pair. Usually, at least one ion is produced by heterolytic cleavage.

Homolytic bond cleavage, also known as homolysis, is the bond breaking process in which the bonding electron pair is evenly divided amongst the products. Radicals frequently result from homolytic cleavage. The chain initiation mechanism stage in the photolytic bromination of methane is an illustration of homolytic bond cleavage.

Learn more about Heterolytic and Homolytic cleavage here:

https://brainly.com/question/28296169

#SPJ1

mass can be calculated using the formula: [tex]m=DV[/tex]

[tex]m=(\frac{4.54g}{1mL})(6.0mL)[/tex]

[tex]m = 27g[/tex]

The volume of the water is obtained as 72 mL.

We know that the heat of vaporization is the heat that is required to raise convert the substance from the liquid state to the gaseous state. Now, we know that we can be able to find the energy from the use of the formula;

H = mL

H = heat that is required

m = Number of moles of the object

L = Heat of vaporization

We know from the problem that we have that;

H = 163 kJ

L = 40.66 kJ/mol

Then we would have;

Number of moles = H/L

= 163kJ/40.66 kJ/mol

=  4 moles

Mass of water = 4 moles * 18 g/mol = 72 g

Since the density of water = 1 g/mL

Volume = Density * mass

= 1 g/mL * 72 g

= 72 mL

Thus, the volume of the water that would be vaporized in the process that we have described is about a volume of 72 mL.

Learn more about vaporization:https://brainly.com/question/14578189

#SPJ1

Platinum (Pt) has six naturally occurring isotopes (190Pt, 192Pt, 194Pt, 195Pt, 196Pt and 198Pt). Platinum -186 would have 78 number of protons and 117 number of neutron.

Platinum is a chemical element represented by the symbol Pt and the atomic number is 78. It is malleable, ductile, highly unreactive, precious, silverish-white transition metal. Platinum (Pt) has six naturally occurring isotopes (190Pt, 192Pt, 194Pt, 195Pt, 196Pt and 198Pt).

Platinum is classified as a transition metal. Platinum atoms have 78 electrons and 78 protons with 117 neutrons in the most abundant isotope of platinum.

Thus, Platinum -186 would have 78 number of protons and 117 number of neutron.

To learn more about the platinum, follow the link;

https://brainly.com/question/8429645

#SPJ1

The two (2) statements that are true of the population shown in this graph include the following:

B. The number of individuals is increasing.

D. The population is growing unchecked.

In Science, a population can be defined as a set of similar items or events that comprises every member of a group and from which a researcher, scientist, or experimenter, obtains or generates data for a statistical study.

A population size can be defined as the number of individual (each) living organisms in a population, and it is usually denoted by N. Basically, population size is primarily associated with the number of genetic variation or genetic drift in a particular population.

Based on the graph, we can logically deduce that the number of individuals is increasing because the line models an exponent growth, which is also growing unchecked.

Read more on population here: https://brainly.com/question/267132

#SPJ1

Answer:

It looks like the equation is already balanced for you, so the first step will be to convert 144.1 grams of HNO3 to moles.

Answer: There is a law

Explanation: This law says if the thing that you throwing could be more height depend how is its volume of mass

Answer:

The first image = double replacement

Second = single replacement

Third = Decomposition

Fourth = Combination

Explanation:

1. a color from each pair is being swapped and replacing each other so there is a double replacement

2. only the blue and the red are changing places so it is single replacement

3. the pair is being separated (decomposed)

4. the red and green are coming together (combined)

The density of the rock as we have it is 7.11 g/mL.

We know that when we talk about the density of the object we are talking about the ratio of the mass of the object to the volume of the object. In the case that we have here we know that the  rock weighing 32.0g is placed in a graduated cylinder displacing the volume from 12.3mL to 16.8mL.

Volume of the rock is the volume of the fluid that has been displaced by the rock as such we have;

Density = mass/ volume

= 32.0 g/16.8 mL - 12.3 mL

= 7.11 g/mL

Learn more about density:https://brainly.com/question/29775886

#SPJ1