If 16% of the nucleotides in one strand of a dna molecule contain the base g, what percent of the nucleotides on the complementary strand will also contain the base g?

MCQs as follows-

chlorophyll is the light-absorbing green coloured pigment that begins the process of photosynthesis, and Chloroplast is a membrane-bound organelle in green plant and algal cells that carries out photosynthesis and generates ATP for the use of plants.

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In 1904, J.J. Thomson published the Thomson model of the atom. The plum pudding model is often referred to as Thomson's model.

In 1897, he also made the electron discovery. Scientists Rutherford and Bohr subsequently refuted this theory. According to J.J. Thomson, an atom is a positively charged sphere with embedded negatively charged electrons.

Neils Bohr disproved it by demonstrating that any atom's mass is centred in its positively charged centre, while negatively charged electrons orbit the positive centre. In highly quantized energy levels, according to Bohr's theory, electrons orbit an atom's nucleus rather than being incorporated into it.

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Answer: because acid and water react in a vigorous exothermic reaction, releasing heat, sometimes boiling the liquid.

Answer:

27.2 kg

Explanation:

13.6 * 2 L of commercial flask of mercury = 27.2 kg.

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It is False that risk is defined as an inherent chemical or physical characteristic.

Risk is the probability that a person if exposed to a hazard will experience( or get harmed)  an adverse health effect, it also goes with situations with equipment of property loss or harmful effects on the environment.Many factors influence the degree of risk such as the nature of exposure, the severity of the effect,  how the person is been exposed, and so on.

Whereas the hazard word has a confusing definition, it refers to a physical or chemical characteristic that has the potential for causing damage to property, people, or the environment. Most of the time hazard gets combined with the word Risk.

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To prepare 128.2ml of a 0.364 M aqueous solution of NaCl.the mass in grams, of NaCl need to use to make the solution is 2.723 gm.

Molarity is defined as the no. of moles of solute per liter of solution.

Here,

Molarity =  moles of solute / Liter of solution

0.36 M solution will contains 0.364 moles of NaCl.

therefore, volume of solution in L =  ( 128.2 / 1000 ) L × 1 L

                                                 = 0.1282 L

that means, it will contain, no. of moles of NaCl

= (0.1282 L of solution × 0.364 ) / 1 L of solution      

= 0.0466 moles of NaCl

now, molar mass of NaCl  = 58.44 g/mol    

so, 1 mol of NaCl has a mass of  58.44 g/mol

therefore, 0.0466 moles of NaCl will have mass of

= ( 0.0466 moles of NaCl × 58.44 g ) / 1 mole of NaCl

= 2.723 g

Thus,To prepare 128.2ml of a 0.364 M aqueous solution of NaCl .the mass in grams, of NaCl need to use to make the solution is 2.723 gm.

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yes ions add another atom

ions are electrically charged particles that can be created by either taking electrons away from neutral atoms to form positive ions or adding electrons to neutral atoms to produce negative ions. The quantity of protons remains constant during the formation of an ion.

Ionic bonds are defined as connections between atoms in which electrons are primarily transported from one atom to another. Since there is always some electron sharing between atoms, we say largely because the sharing in ionic bonds is relatively uneven. The bond has a stronger ionic character the more unequally the electrons are shared.

Between a metal and a non-metal, ionic bonding form. Ionic bonds, as opposed to covalent ones, involve the transfer of valence electrons between atoms.

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yes Ions can be combined with other atoms to create new elements or compounds.

However not all ions are atoms, an atom can be an ion.

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One molecule of nabh4 will reduce only two molecules of m-acetylbenzaldehyde to form the corresponding product because there are only two functional groups that can react with NaBH4, namely the ketone and the aldehyde, but NaBH4 had four H present to protonate the molecule.

What is protonation?

An atom, molecule, or ion can be protonated by adding a proton to it. The difference between protonation and hydrogenation is that during protonation, the protonated species' charge changes, whereas it remains unchanged during hydrogenation. Numerous catalytic processes result in protonation.

A conjugate acid is created when a proton (or hydron, or hydrogen cation), (H+), is added to an atom, molecule, or ion. Deprotonation is the analogous process that occurs when a proton is taken out of a Bronsted-Lowry acid.

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One type of chemical reaction is combustion. Carbon dioxide is produced when carbon combines with oxygen in the combustion of charcoal, for example. Carbon and oxygen are reactants, or the chemicals that initiate a chemical reaction. The process produces carbon dioxide. However, this change is just physical.

As the constituent molecules' composition remains unchanged: 11.19% hydrogen and 88.81% oxygen by mass. Physical change can be classed as either reversible or irreversible. When we burn coal, a chemical reaction occurs, and new substances such as carbon dioxide and water are formed. Burning coal is considered as a chemical change since it results in the production of new compounds.

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A gram of fat stores more energy than a gram of starch due to more C-H bonds  within fat molecules relative to starch molecules.

The energy released/stored by nutrients is known as calorific value.

The calorific value of a  substance is expressed in kilo calories(kcal).

1 kcal is defined the amount of energy required to raise the temperature of 1 kg of water by 1 °C.

The physiological calorific value of fats and carbohydrates is 9.0 kcal/g and 4.0 kcal/g respectively.

As it is evident from these values that the energy stored per gram of fat is more than the energy stored per gram of starch.

Now, the reason behind this difference in energies between these two molecules is due to the different number of C-H bonds present in them, as is evident from the adjoining images.

Therefore, A gram of fat stores more energy than a gram of starch due to more C-H bonds within fat molecules relative to starch molecules.

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The molar mass of compound tells you the mass of 1 mole of that substance. The percent by mass of y in x₂y₂ is 57.14%

Molar mass of a substance is the mass in grams of one mole of the compound. In a substance, the amount of entities present e.g. atoms, molecules, ions, is defined as a mole. A mole of any substance is 6.022×1023 molecules

In compound x₂y, the percentage mass of x is 60%. The percentage mass of y is 40 %. Let the compound  weighs M , 2 units of x weigh 0.6M, 1 unit of x weighs 0.3* M and one unit of y weight 0.4*M.

In the compound x2y2, the percentage mass of y is

0.4*2 ÷ (0.4*2 + 0.3* 2 ) = 8 ÷ (.8+.6) = 0.8 ÷ 1.4 = 57.14 %

The percent by mass of y in x₂y₂ is 57.14%.

Thus, the percentage by mass of y in x₂y₂ is 57.14.

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The independent variable is the type of liquid and the dependent variable growth of the plants.

An experiment is used to establish the relationship between causes and effect in each of the following cases, let us determine the dependent and independent variable.

1) The independent variable is the type of liquid and the dependent variable growth of the plants. The constants are the plants and the land. A valid hypothesis is; "The growth of the plants depends on the type of liquid used to water the plants"

2) The independent variable is the mode of transport and the dependent variable is the time taken to reach the market. The constant is the distance covered. A valid hypothesis is; "The time taken to arrive at the grocery store depends on the mode of transport used"

3) The independent variable is the kind of app and the dependent variable is the  battery life. The constant is the phone used while the hypothesis is; "Certain apps delete the battery faster than others"

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Answer:

C. to the left of the arrow

Explanation:

The reactants (the chemicals that initiate the chemical reaction) are represented on the left, while the products (the substances that result from the reaction) are represented on the right. An arrow sign ("→" commonly read aloud as "yields") separates the two.

Sorry if I'm wrong

Answer: C

Explanation:

C

The number of protons, electrons and neutrons are in an isotope of the element with an atomic number of 79 and a mass number of 200 is 79, 79 and 121 respectively.

Atomic number of an element is the number of protons in an atom of the element while the atomic mass is the sum of the protons and neutrons in the atom.

The electron number is equal to the number of protons in a neutral atom.

According to this question, the isotope of an element has an atomic number of 79 and a mass number of 200.

Therefore, the number of protons, electrons and neutrons are in an isotope of the element with an atomic number of 79 and a mass number of 200 is 79, 79 and 121 respectively.

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The given number is can be written in standard form as 1 times 10 to power negative 10 ( 1 x 10⁻¹⁰).

A standard form is a form of writing a given mathematical concept like an equation, number, or an expression in a form that follows certain rules.

The given number =  1.0 x 10^-10

The given figures can be written in standard form as follows;

1.0 x 10^-10 = 1 x 10⁻¹⁰

Thus, the given number is can be written in standard form as 1 times 10 to power negative 10 ( 1 x 10⁻¹⁰).

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The frequency of a photon with a wavelength of 360 nm frequency of a photon is 8.33 × 10¹⁴ s⁻¹.

Given,

The wavelength of photon = 360 nm or 3.60 × 10⁻⁷

three × 10⁸ m/s is the speed of mild.

We need to discover the frequency of a given photon.

The frequency of a photon is described as the wide variety of waves that pass via a set point in a unit of time.

therefore, f = c/λ

where f is the frequency, c is the velocity of light, and λ is the wavelength of the photon.

f = 3 × 10⁸/ 3.60 × 10⁻⁷

Or, f = 0.8333 × 10¹⁵ s⁻¹

Or, f = 8.33 × 10¹⁴ s⁻¹

Hence, the frequency of the photon is 8.33 × 10¹⁴ s⁻¹.

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Mass of nitrogen in the second sample = 70 g.

Simply said, (14.01 + 14.01) = 28.02 amu is the mass of the nitrogen molecule, or N2. This is referred to as the molecular mass, which is just the total atomic masses of all the atoms that make up a certain molecule.

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The electrons in the atom's third energy level that are involved in chemical reaction are six in number.

Sulfur is an element that can be found in group sixteen of the periodic table. It has a valency of two because it has six electrons in the outermost shell and shares two more electrons with another element in order to form a covalent bond.

There are three electron shells that could be found in sulfur. The first shell has two electrons, the second shell has eight electrons while the last shell has six electrons.

As such, the electrons in the atom's third energy level that are involved in chemical reaction are six in number.

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Suppose we heat a 4. 31 g sample of a Na2Co3 hydrate. after thorough heating, the mass of the compound is 3. 22 g based on the data, Na₂CO₃ • 2H₂O for the hydrate we start with this formula.

Here compound are Na₂Co₃ then mass of compound is 3.22g and molar mass is 105.98g/mol

Moles of compound (anhydrate Na₂CO₃) = mass / molar mass = 3.22 g / 105.98 g mol = 0.0304 mol mass

So here compound Na₂Co₃ are given and we start with formula Na₂CO₃ • 2H₂O  for the hydrate.

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Answer:

Lu

Hf

Ta

Explanation:

Lu- Lutecium
Atomic Number- 71
Atomic Mass-174.967

Hf- Hafnium
Atomic Number-72
Atomic Mass178.492

Ta- Tantalum
Atomic Number-73
Atomic Mass-180.948

The chemical elements that meet the criteria are Hafnium (Hf) and Tantalum (Ta).

The atomic number represents the number of protons in the nucleus of an atom, while the atomic mass represents the total mass of protons and neutrons in the nucleus of an atom.

Elements with atomic numbers greater than 70 are located in the bottom rows of the periodic table, known as the "lanthanides" and "actinides."

So, Atomic Number > 70 and Atomic Mass < 181.2 u

1. Hafnium (Hf) - Atomic Number: 72, Atomic Mass: 178.49 u

2. Tantalum (Ta) - Atomic Number: 73, Atomic Mass: 180.95 u

3. Tungsten (W) - Atomic Number: 74, Atomic Mass: 183.84 u

4. Rhenium (Re) - Atomic Number: 75, Atomic Mass: 186.21 u

Therefore, the chemical elements are Hafnium (Hf) and Tantalum (Ta).

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Answer:

Fusion.

Explanation: fusion is a nuclear reaction in which smaller atoms fuse together to form heavier elements. This describes the fusion of hydrogen into helium.

Answer:

h20

Explanation:

science, 3 hydrogen and one oxygen make h2o

[tex]H_3O^+[/tex], hydronium ion is the name given to this molecule. Therefore, the correct option is option B among all the given options.

The smallest recognisable unit which which a pure material may be split while retaining its composition and chemical characteristics is a molecule, which is a collection of two or more atoms. Until portions consisting of tiny molecules are reached, the division of a sample for a substance onto progressively smaller parts does not result in a change with respect to its composition as well as its chemical characteristics. [tex]H_3O^+[/tex], hydronium ion is the name given to this molecule.

Therefore, the correct option is option B among all the given options.

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If a capacitor is overcharged, the electrons from the terrible plate may be pulled through the insulation to the high-quality plate. the capacitor is stated to be shorted.

while you join a capacitor to DC voltage, the capacitor will price to this voltage, and the charging current will drop to zero.

You need to make certain the voltage isn't better than the capacitor’s  Shorting.

On AC, the capacitor will comply with the voltage, w/a put off. again, you need to make sure the voltage rating of the capacitor fits the voltage(In this situation peak voltage).

If the voltage is higher in either case-the capacitor may short.

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It is a good idea to put input values and output values into separate sheets when solving a complex problem if it improves readability and usability. this statement is false.

The definition of a problem is something that needs to be resolved or an unpleasant or undesirable condition that needs to be corrected. An example problem is an algebraic equation. An example problem is when it's raining and you don't have an umbrella.

The most common meaning is a diplomatic alternative to "problem". The word "problem" can be too negative, especially in the world of politics and business. It focuses on the bad side of things and suggests that someone made a mistake. The main difference between a task and a problem is that a task is a difficult task that a person wishes to complete, whereas a problem is difficult to manage, understand, and impedes an individual's progress.

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The reactant in excess is Al (s)

The mass of remaining surplus reactant is 8.76 g

According to question

4 moles of aluminium reacts with 3 moles of oxygen, to make 2 moles of alumina.

Molar mass Al: 26.98 g/m

Molar mass O2: 32.00 g/m

Mass / Molar mass: Moles

20 g Al / 26.98 g/m = 0.741 moles 10 g O2/32.00 g/m 0.312 moles =

Let's find out the limiting reactant and reactant in surplus by rules of three: the 4 moles of Al reacts with 3 moles of O2

0.741 moles of Al reacts with (0.741.3)/4 = 0.555 moles

Now we know that are needed 0.555 moles of O2 to consume all the Al but we only have 0.312 moles of O2.

The O2 is the limiting reactant, so the Al is the reactant in excess.

Let's make another rule of three

3 moles of O2 reacts with 4 moles of Al

0.312 of O2 reacts with (0.312 .4)/3 = 0.416

We need 0.416 moles to consume all the O2 and we have 0.741 moles of Al.

When we use 0.416 moles from 0.741 it remains 0.325

0.325 moles . 26.98 g/m = 8.76 grams

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Answer:

Explanation: Solid to Solid mixtures

1. Iron+Sulphur

2. Pottasium Nitrate+Potassium Chlorate

3. Ammonium Chloride+Sodium Chloride

Solid to Liquid Mixtures

1. Salt+Water

2. Sand+Water

3. Calcium Carbonate+Water

Liquid to Liquid Mixtures

1. Alcohol+Water

2. Oil+Water

3. Kerosene+Water

Liquid to Gas Mixtures

1. Hydrogen+Oxygen

2. Hydrogen Chloride+Nitogen

3.Air (Air is a mixture of many gases)

The general molecular formula for alkanes is cnh2n 2. The general molecular formula for cycloalkanes with two rings CnH2n−2.

Cycloalkanes are hydrocarbons with a ring type structure. The reason of ring formation is because they are saturated compounds. The general formula of the cycloalkanes is CnH2n where n is the number of carbon atoms.

cyclopentane, Cyclobutane, cyclohexane, and cycloheptane, cyclooctane are some example of cycloalkanes and Cyclopropane is considered one of the smallest cycloalkanes.

Cycloalkanes have a lot of uses. They are used in the medical industry for the production of drugs. These compounds are also used in hair and food industries.

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Explanation:

Oxygen has atomic number eight. This means that the nuclei of all oxygen atoms have eight protons. A neutral oxygen atom will also have eight electrons.

In an oxygen ion with a

2

−

charge, the number of protons is still 8, but the number of electrons is 10.

This results in the oxygen ion having an octet (8) of valence electrons.