How are Hfr strains of bacteria different from F+ strains? Select one: a. Cells of Hfr strains cannot initiate conjugation with F- cells. b. Cells of Hfr strains can initiate conjugation with F+ cells or other Hfr cells. c. Cells of Hfr strains are able to transfer chromosomal genes, whereas cells of F+ strains cannot. d. The F factor is integrated into the bacterial chromosome in all or most cells of an Hfr strain but in only a few cells in an F+ strain.

Answer:

atoms have same atomic number but different atomic masses is called isotopes

Explanation:

The pair of elements which are non-metals and at the same time; gases at room temperature and normal atmospheric pressure are as follows:

N2, O2, He, Ar

An element is a substance which cannot be split into simpler units by any ordinary process.

Some few examples of elements include:

Hydrogen

Helium

Lithium

Beryllium

Boron

Carbon

Nitrogen

Oxygen

Fluorine

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Answer:

They are not pure elements, instead they are compounds, hence why they are not found on the periodic table. (Periodic table only consists of pure elements)

Answer:

Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged.

Explanation:

Explanation:

littoral horizantal raw curated

The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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Answer:

1) 2

2) 1

3)1

4) 2

5)3

6)1

7)yes except Oxygen

When Lead reacted with nitric acid, lead(II) nitrate, nitrogen oxide and water are produced.

What products are produced when lead reacts with nitric acid?

Lead(II) nitrate, nitrogen oxide and water are the products which are produced by reacting lead and nitric acid with each other. The nitrogen attach with the lead molecule as well as oxygen which produces Lead(II) nitrate and nitrogen oxide.

So we can conclude that when Lead reacted with nitric acid, lead(II) nitrate, nitrogen oxide and water are produced.

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Answer:

1 cubic centimeter

Explanation:

Answer:

milliliter is the same as cm^3

Explanation:

Answer:

The correct answer is - false.

Explanation:

At the energy-generating station, when the coal is burned, the chemical energy store in the coal converted into thermal energy and light or luminous energy.

The thermic energy generated used to heat and boil the water or liquid to generate the gas and generate the kinetic energy to move the fan that is desgined to generate the electrical energy.

Thus, the statment is false statement as it does not convert into sound energy.

Answer:

i think right artrium but not full aure

When a food source is missing an essential amino acid, it is called a limiting amino acid. The essential amino acid lysine is not common in foods. In simpler words, an amino acid is essential if it cannot be produced by the human body and must be obtained through the diet.

Foods with complete proteins are those that contain all the essential amino acids that the body requires.When a food source is lacking in an essential amino acid, it limits the body's ability to synthesize new proteins. This essential amino acid is referred to as the limiting amino acid. The limiting amino acid can vary depending on the source of the protein that is being consumed.

There are nine essential amino acids: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. These are amino acids that the human body cannot synthesize, and so they must be obtained through the diet.Lysine is not as common in foods as other essential amino acids. It is found in protein-rich foods such as beans, peas, lentils, and other legumes, as well as in some seeds and grains. Meat and dairy products are also excellent sources of lysine, but a vegetarian or vegan diet may require lysine supplementation.

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Answer:

The product of the synthesis reaction is CaI.

Explanation:

In chemistry, chemical equations are the representation of chemical reactions between elements, compounds, substances, or molecules.

They are written using element symbols (and sometimes including their current state of matter).

Therefore, if we wanted to show the reaction of sodium and chlorine to make sodium chloride, or table salt, we would illustrate it as such:

\(\bullet \ \text{Na + Cl} \rightarrow \text{NaCl}\)

A synthesis reaction in chemistry is the combination of two or more elements, compounds, molecules, or substances to make one compound, molecule, or substance.

The parent equation for a synthesis reaction is:

\(\bullet \ \text{A + B}\rightarrow \text{AB}\)

Therefore, we need to find out what the element symbols are for both calcium and iodine.

If we reference a periodic table, we will see that calcium is atomic number 20 and has the symbol Ca.

Additionally, when we locate iodine, we will see that it is atomic number 53 and has the atomic symbol I.

Now, we just need to create the reaction equation.

\(\text{Ca + I}\rightarrow \text{?}\)

We know that we are dealing with a synthesis reaction, or a combination, so the elements will combine to make one substance.

With this information, we can make an equation:

\(\text{Ca + I} \rightarrow \text{CaI}\)

Therefore, the product of the synthesis reaction is CaI.

Note: Please note that "I" is an uppercase i.

The probability that someone who has a positive test actually has the disease is approximately 24%.

The low probability that someone who tests positive actually has the disease despite the test's accuracy can be attributed to two factors: the rarity of the disease and the rate of false positives.

Firstly, let's consider the rarity of the disease, which is present in only 2% of the population. This means that even if the test is highly accurate, a positive result is more likely to be a false positive due to the larger proportion of healthy individuals in the population.

Secondly, we need to take into account the rate of false positives, which occurs in 6% of healthy individuals. When we combine this with the small percentage of the population actually having the disease, the number of false positives can outnumber true positives.

To understand this better, let's consider a hypothetical group of 1000 individuals. Out of these, only 20 (2%) would have the disease, while the remaining 980 (98%) would be healthy. The test's accuracy suggests that 19 out of the 20 individuals with the disease would test positive, and approximately 59 (6% of 980) healthy individuals would also test positive falsely.

Therefore, out of the total 78 positive test results (19 true positives + 59 false positives), only 19 (approximately 24%) would actually indicate the presence of the disease. This demonstrates why the probability of having the disease, given a positive test result, is relatively low.

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Explanation:

7.95x10^7 = [?]x 10^6

[?] = 79.5

hope this helps you.

Under all temperatures the reaction occurs spontaneously. Option D is correct.

A reaction occurs spontaneously when the Gibbs free energy change of the system is negative, which implies a decrease in the system's free energy.

The following equation expresses the relationship between Gibbs free energy, enthalpy, and entropy:

ΔG∘=ΔH∘−TΔS∘

where ΔG∘ is the change in Gibbs free energy,

ΔH∘ is the change in enthalpy,

T is the temperature in kelvin,

and ΔS∘ is the change in entropy.

The Gibbs free energy change, enthalpy change, and entropy change all have a positive value for a spontaneous reaction.ΔS∘ is positive and ΔH∘ is negative in this specific reaction. This means that the temperature at which the reaction will occur spontaneously is all temperatures.

Therefore, we can say that this reaction is spontaneous at all temperatures.

To determine whether a reaction is spontaneous or nonspontaneous, the Gibbs free energy change (ΔG) must be calculated, and the sign of ΔG indicates the spontaneity. If ΔG is negative, the reaction is spontaneous; if ΔG is positive, the reaction is nonspontaneous, and if ΔG is zero, the reaction is at equilibrium.

Therefore, Option D is correct.

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The amount of heat is 288 kJ  needed to increase the temperature of 300g of water (specific heat 4.18J/g°C) from 27°C to 50°C

Heat is the transfer of kinetic energy from one medium to the object from another medium

Here given data is

Temperature = 27°C to 50°C

Specific heat =  4.18J/g°C

Mass = 300g

WE have to calculate the amount of heat =?

The formula is

the amount of heat

Q = mCΔT

Q = 300g × 4.18J/g°C × (27°C - 50°C)

Q =  300g × 4.18J/g°C × 23

Q = 288 kJ

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Answer:

Its B) Kinetic energy increases and potential energy decreases when the velocity of an object increases.

Explanation:

because i took the test on edge 2020

Taking into account the definition of kinetic, potencial and mechanical energy, the tatement that best compares potential and kinetic energy is: Kinetic energy increases and potential energy decreases when the velocity of an object increases.

Kinetic energy is a form of energy. It is defined as the energy associated with bodies that are in motion.

Kinetic energy is defined as the amount of work necessary to accelerate a body of a given mass and at rest, until it reaches a given speed. Once this point is reached, the amount of accumulated kinetic energy will remain the same unless there is a change in speed or the body returns to its state of rest by applying a force.

The kinetic energy is represented by the following expression:

Ec= ½ mv²

Where:

Potential energy is the energy that measures the ability of a system to perform work based on its position.

Gravitational potential energy is the energy associated with the gravitational force. This will depend on the relative height of an object to some reference point, the mass, and the force of gravity as follow:

Ep= m×g×h

Where:

Finally, mechanical energy is that which a body or a system obtains as a result of the speed of its movement or its specific position, and which is capable of producing mechanical work. Then:

Potential energy + kinetic energy = total mechanical energy

The principle of conservation of mechanical energy indicates that the mechanical energy of a body remains constant when all the forces acting on it are conservative (a force is conservative when the work it does on a body depends only on the initial and final points and not the path taken to get from one to the other.)

Therefore, if the potential energy decreases, the kinetic energy will increase. In the same way, if the kinetics decreases, the potential energy will increase.

Taking into account the definition of kinetic energy, when the velocity of an object increases the kinetic energy increases.

Therefore, considering the principle of conservation of mechanical energy, the potential energy decreases.

So, the correct answer is the second option:  Kinetic energy increases and potential energy decreases when the velocity of an object increases.

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Answer:

The answer is B

Explanation:

0.25 + 0.39= 0.64

Answer:

i want to see a pic but if you got nice toes all give you my number

Explanation:

Answer:

nah Im good

Explanation:

single forever

The answer is B hydro sphere

Answer: Carbon oxide

Explanation:

The value of Ksp for Hg2Br2 at 25∘C is 1.0 × 10^-12.

The given galvanic cell involves the reaction between Hg(l), Hg2Br2(s), Br−(0.10M), MnO4−(0.10M), Mn2+(0.10M), H+(0.10M), and Pt(s). The potential of the cell is given as 1.214 V at 25∘C.

To calculate the value of Ksp for Hg2Br2 at 25∘C, we can use the Nernst equation:

Ecell = E°cell - (0.0592/n) * log(Q)

Where Ecell is the cell potential, E°cell is the standard cell potential, n is the number of electrons transferred, and Q is the reaction quotient.

Since Hg2Br2 is a solid and its concentration does not appear in the reaction quotient, we can assume its activity is 1. Therefore, the reaction quotient simplifies to the concentrations of the other species involved in the cell:

Q = [Br−] / [MnO4−][Mn2+][H+]

By substituting the given concentrations and the calculated cell potential into the Nernst equation, we can solve for E°cell. Then, using the Nernst equation at equilibrium (Q = Ksp), we can solve for Ksp. In this case, the value of Ksp for Hg2Br2 at 25∘C is found to be 1.0 × 10^-12, rounded to one significant figure.

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Answer:

can we get more of the problem?

Answer:

Regulation of body temperature

Explanation:

The activation energy of the reaction is 40 Kj/mol

Activation energy is the amount of energy required for a chemical reaction to occur. In other words, it's the minimum energy that molecules must possess in order to react with one another. The activation energy can be thought of as the height of a hill that the reactants must climb in order to reach the other side.

The activation energy is a key factor in determining the rate of a chemical reaction. Generally, reactions with higher activation energies occur more slowly than those with lower activation energies.

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Answer:

The average atomic mass of zinc is 65.38 u.

Explanation:

Hope this helps.

Give brainliest please!

Answer:

1 moles Carbon Dioxide = 44.0095 gram using the molecular weight calculator and the molar mass of CO2

Explanation:

The molecules in 0.87 mole of carbon dioxide are 5.2 x 10²³.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

If there are 6.023 × 10²³ molecules present in one mole of carbon dioxide then for 0.87 moles

\(6.023 \times 10^2^3 \times 0.87 = 5.2 \times 10^2^3\)

Thus, the molecules in 0.87 mole of carbon dioxide are 5.2 x 10²³

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