Calculate the volume of an object with dimensions measuring: 12 cm x 3 cm x 9 cm?

10.0 trillion DNA molecules is equal to 1.66 × 10–11 moles of DNA.

The correct option is A.

The directions needed for a creature to grow, endure, and reproduce are encoded in its DNA. DNA sequences must be converted into messages that can be utilized to create proteins, that are the complex molecules that carry out the majority of the work in our bodies, in order to perform these activities.

The DNA of a person can be found in almost all of their cells. The majority of DNA is found in the cell nucleus (where it is known as nuclear DNA), but there is also a tiny quantity of DNA in the mitochondrial .

1 trillion = 10¹² DNA molecules

6.022 × 10²³ molecule = 1 mole

10¹² DNA molecules = 1 / 6.022 × 10²³ × 10¹²

                                 = 1.66 × 10–11 moles.

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The complete question is -

10.0 trillion DNA molecules is equal to how many moles of DNA?

A-1.66 × 10–11 moles

B-6.02 × 1010 moles

C-6.02 × 1036 moles

D-1.66 × 1010 moles

The concentration of HBr used in the titration is found to be 0.0978M.

Volume of NaOH used is 27.50ml and it’s molarity used is 0.200M.

Volume of HBr used is 56.20ml.

On comparing molarity of both the solutions, we get the relation

HBr × VHbr  = MNaOH × VNaOH

MHBr = 0.200M × 27.50ml /56.20ml

MHBr = 0.0978M.

A colorless, stifling gas called hydrogen bromide is highly dissociated in water and exceedingly soluble in water. In the presence of damp air, it rapidly fumes. Hydrogen bromide gas is a very caustic chemical that, when contacted, can result in serious burns.

To determine the concentration of an identified analyte, titration is a typical laboratory technique for quantitative chemical analysis. A standard solution with a defined concentration and volume is prepared as a reagent, also known as the titrant.

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Answer:

Density, flammable,melting point

Explanation:

Im not 100% sure but the other 2 choices just dont make sense

The concentration mass by volume percent of a solution is 2 %

What is mass by volume percent of a solution ?

The ratio of the mass of the solute present in a solution to the volume of the solution as a whole is known as the mass/volume percent. The given proportion must be multiplied by 100 because this type of concentration is expressed as a percentage, as shown below.

Mass/Volume Percent is calculated as follows:

mass (solute(g)) / Volume(solution(mL) x 100

Given that:-

Mass of solute =50g

Volume of solution =2.5L = 2500mL

As we know that, mass by volume percentage of the solution is given by-

Mass by volume %=  mass of solute/Volume of solution *100

                                = 50/2500*100 = 2 %

The concentration mass by volume percent of a solution is 2 %

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The change in internal energy of the system is found to be -8joules.

We know that, work done W by the system is taken as negative. Work done on the system is taken as positive.

Heat absorbed Q by the system is taken as positive and heat released by the system is taken as negative.

It is given,

W = +4J (Work done on the system)

Q = -12j (Head released by the system)

Now, we calculate change in Internal energy ΔE of the system by using first Law of thermodynamics,

It says, total change in internal energy is equal to the sum of work done and heat absorbed,

So, we can write,

ΔΕ = Q + w

Putting the values,

ΔΕ = −12+ 4

ΔΕ = -8J

Hence, change in internal energy of the system is -8joules.

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Answer:

Explanation:

Here, we want to describe the relationship between the volume and temperature of an ideal gas

This relationship is defined by Charles' law

From this law, we know that the volume of a given mass of gas is directly proportional to its temperature at a fixed pressure

What this means is that as long as the pressure remains unchanged, when the volume increases, the temperature increases, and when the volume decreases, the temperature decreases

These can be represented by the mathematical formula below:

The product of the reaction as it has been shown above is  butoxymethane.

A chemical reaction is an interaction that takes place between two or more chemical substances to yield a product (s). We should note that the reactants are written at the left hand side of the reaction equation while the products are written at the right hand side of the reaction equation. This is how we show  reaction on paper.

Having said this, the reaction that have been shown in the question would occur by an SN2 synchronous mechanism to yield butoxy methane product.

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Answer

29.3171 g KClO₃

Procedure

To solve this question consider the following chemical reaction:

2KClO₃→2KCl+3O₂

Then we will use the ideal gas formula to determine the number of moles present in 6.75 L of oxygen gas.

Data:

V=6.75 L

T= 298 °K

P= 1.3 atm

R= 0.08206 L⋅atm⋅°K⁻¹⋅mol⁻¹

Equation

PV=nRT

Solve for n to get the moles

Use the stoichiometry of the reaction to convert from moles of oxygen to moles of KClO₃.

Finally, convert from moles to grams

The metal Strontium is symbolized by Sr, and since it is a metal its oxidation number is 0, so no charge.

In this reaction, the Sr will become 2+, so, since Cl is 1-, the proportion is 1 Sr to 2 Cl, so the unbalanced reaction is:

To balance it, we need to add a coefficient of 2 on HCl, so we have 2 H on both sides and 2 Cl on both sides.

The Sr is and continue balanced.

So, the balanced reaction is:

As we can see, the left part has Sr alone and H with Cl, while on the right side this changes, H is alone and Sr is with Cl. This means that Cl was displaced from H to Sr, so this is a single displacement reaction.

The amount, in grams, of hydrofluoric acid that will be formed when 173.63 grams of hydrogen reacts with 173,63 grams of fluorine would be 182.8 grams.

The balanced equation of the reaction is written as:

[tex]H_2 + F_2 -- > 2HF[/tex]

According to the equation, the mole ratio of hydrogen and fluorine that react to produce hydrofluoric acid is 1:1.

Recall that: mole of substance = mass of the substance/molar mass

Molar mass of [tex]H_2[/tex] = 1x2 = 2 g/mol

Molar mass of [tex]F_2[/tex] = 19x2 = 38 g/mol

Mole of 173.63 grams  [tex]H_2[/tex] = 173.63/2

                                             = 86.82 moles

Mole of 173.63 grams  [tex]F_2[/tex]  = 173.63/38

                                        = 4.57 moles.

Considering the mole ratio of the two reactants, it appears that fluorine is limited in availability and will, therefore, determine the amount of hydrofluoric acid that will be produced.

Mole ratio of fluorine to hydrofluoric acid = 1:2.

Equivalent mole of hydrofluoric acid = 4.57 x 2 = 9.14 moles.

Mass of 9.14 moles HF = 9.14 x 20

                                     = 182.8 grams

Thus, the amount of hydrofluoric acid formed from the reaction is 182.8 grams.

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The important processes of the water cycle are:

The water cycle refers to the processes by which water is replenished or renewed in the environment.

There are three processes in the water cycle, and they are:

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For the thing to move, 2 joules were used.

There are numerous shapes that energy can take. Examples of these energies include gravitational energy, mechanical energy, electrical energy, sound energy, chemical energy, nuclear or atomic energy, light energy, heat energy, and so on. Each form has the capacity to alter or change into the other forms.

Energy is a major factor in our daily lives because it is a fundamental need for humans. You need energy to move, rise from bed, or even merely to go down the road. Energy not only heats but also cools our man-made structures.

formula, joules = 1/2*kilogram*{[tex]\frac{meter}{sec}[/tex]}^2

joule = [tex]\frac{1}{2}[/tex]*4*1 = 2 joule

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Question: Relate reactivity to electron distance from nucleus/strength of all attraction to nucleus

In this instance, it is safe to think of the size of an atom with the electron and nucleus position.

• The larger atom ( more electons ) the more reactive. the larger the atom will also be further from the nucleus and therefore further from the positively charged nucleus.

• Therefore, in terms of attraction, it will be easier for the valence electrons to leave the atom and form ionic bond /interact with another atom to form covalent bond .

In conclusion, reactivity of an element is related to changes in the electronic structure which is strongly dependent upon the attraction of valence electrons to the nucleus.

The solution is different from the original water being that the solution turns phenolphthalein pink (option B).

A base is any of a class of generally water-soluble compounds, having bitter taste, that turn red litmus blue, and react with acids to form salts.

A base is known to contain excessive amounts of hydroxide ions (OH-), which it releases in an aqueous solution.

Phenolphthalein is an indicator solution that appears colourless, however, when it is exposed to alkaline solution it turns pink.

This suggests that a basic solution turns phenolphthalein solution pink.

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The descriptions that the sub-atomic  particles can electrically attract or repel other sub-atomic particles and has a charge best suits for electrons and protons.

Sub-atomic particles are the basic constituents of an atom. Electrons, protons and neutrons are called  subatomic particles.

Electrons possess negative charge and protons have positive charge. Thus electrons attracts a proton and vice versa. Neutron is neutral and shows no attraction or repulsion.

Hence, The description that a sub-atomic particle having charge and electrically attract or repel other sub-atomic particle fit for both electrons and protons.

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There are protons, neutrons, and electrons, three types of subatomic particles. Protons and electrons, two of the subatomic particles, each have an electrical charge of one or the other. On the other hand, neutrons lack a charge.

The fundamental feature of matter known as electric charge, which is carried by some elementary particles, determines how the particles are affected by an electric or magnetic field.

Protons are positively charged particles that are found inside the atom's nucleus. Neutrons are found inside the atom's nucleus and are neutral particles.

Electrons are negatively charged particles that surround the nucleus by unclear paths.

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ANSWER

The volume of fluorine is 510.52L

STEP-BY-STEP EXPLANATION:

From the question provided, you were given the mass of fluorine to be 432.8 grams.

Given information

Mass of fluorine = 432.8 grams

To find the volume of Fluorine, we need to find the mole of fluorine from the mole formula

From the periodic table, the molar mass is 18.99 g/mol

The next thing is to substitute the data into the formula

Since the mole of fluorine is 22.79 moles, then, we can now find the volume of fluorine.

At STP, 1 mole is equivalent to 22.4L

Let the volume of fluorine be x

The volume of fluorine is 510.52L

In the process of metabolic regulation, cells can turn on and off the genes that make enzymes, or they can regulate the enzymes that are already made; option C.

Metabolic processes are the processes by which the cell carries out its activities.

There are types of metabolic activities that occur in the cells:

Catabolism is the metabolic process in cells by which large molecules are broken down to release energy required by the body to carry out other cellular actities. An example of catabolism is glycolysis.

Anabolism - this is a metabolic process in cells where energy is used to produce large molecules from the small molecules present in the cells. An example of catabolism is protein synthesis from amino acids.

The cells need to regulate these two processes and this is known as metabolic regulation.

The cells regulate these processes at the gene level that produces the enzyme that catalyzes these processes or by regulating the activity of the enzymes.

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The initial 10.0 grams of water is a kind of intensive property.

What do you mean by intensive properties?

Intensive properties are those properties which do not depend upon the amount of the given substance. For example Temperature and pressure.

Generally, grams are used to represent concentrations. Therefore, always consider extensive. However, in the given question, the concentration is specified i.e. means fixed. So, the 10.0 grams of water become intensive in the given conditions.

Hence, the answer is an intensive property.

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The equation that gives the heat for a change in temperature is:

Where Q is the heat, m is the mass, c is the specific heat capacity and ΔT is the change in temperature.

So, we can calculate Q by substituting the given values:

So, we have:

So, the heat needed is 3918.75 J or approximately 3900 J.

Answer:

Explanation:

Here, we want to get the limiting reactant

The limiting reactant is the reactant that produces less amount of the product

We start by writing the balanced equation of the reaction:

We have this as:

The iodide here is the copper (i) iodide

From the question, we have 0.56 g of copper (ii) chloride

We need to get the number of moles of it that reacted

We can get that by dividing the mass by the molar mass of copper (ii) chloride

The molar mass of copper (ii) chloride is 134.45 g

Thus, we have the number of moles as:

From the equation of reaction, 2 moles of copper ii chloride produced 1 mole of the iodide

Thus, the number of moles of the iodide produced by the actual reacting mass would be:

Now, let us get the number of moles produced by Potassium iodide

We can get this by dividing the mass by the molar mass of potassium iodide

The molar mass of potassium iodide is 166 g/mol

Thus, we have the number of moles as:

From the equation of reaction, 4 moles of KI produced 1 mole of the iodide

Thus:

From what we can see, potassium iodide would give less mass of the copper (i) iodide

This makes potassium iodide the limiting reactant

The statement that describes why Emilio's description is incorrect is that a law cannot be disproved. Therefore, option C is the correct answer.

Scientific laws are guidelines for how nature will act in specific circumstances, typically expressed as an equation. It can be disproved when a new law emerges. In fact, a law cannot be considered scientific if it cannot be disproved by other's experiments.

For instance, the volume of the gas increases as the gas's temperature rises. We refer to this as a natural law. It was first said that sun and stars revolved around the Earth. But later on, this law was disproved by Copernicus. He stated that Eath revolves around the Sun in its particular orbit.

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Morality is the body of rules that enables individuals to coexist peacefully in groups. In order to act morally, people may have to sacrifice their own immediate interests in order to further society. It is what societies deem to be "acceptable" and "proper.

The standard by which society determines whether behaviour is appropriate and inappropriate is morality. Morality is demonstrated by the conviction that it is immoral to take something that is not theirs, even if no one would notice.

Hydrochloric acid is a colourless solution of hydrogen chloride (HCl) in water. Concentrated HCl is a particularly corrosive acid with several industrial uses. The pH levels of swimming pools are changed using this material, which is usually referred to as "muriatic acid" in this context, to make them safe to use and to disinfect the water.

Molarity is defined in terms of the volume of the solution, NOT the volume of water. Inaccurate = 5.0 The solution is humour.

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When the moon is at point 2, it will be covering Florida, which will cause some areas of the earth to be dark while others will be light.

Our home planet is Earth. According to scientists, the formation of Earth and its moon coincided with that of the entire solar system. The estimated age of that event is approximately 4.5 billion years ago. The solar system's fifth-largest planet is Earth. Its diameter is roughly 8,000 kilometers.

We have life on our home planet, that also shields us from outer space. Our own planet, Earth, is a world unto itself. Earth, as third planet from the sun, is the only place in the entire cosmos where the existence of life has been established.

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Florida will be under the shadow of the moon at point 2, making some parts of the earth dark and others light.

A year is mainly divided into four seasons- winter, spring , summer and autumn. These seasons are experienced due to change in the position of earth around the sun

Earth is our home planet. According to scientists, the development of the Earth and its moon occurred simultaneously with that of the solar system as a whole. That incident occurred roughly 4.5 billion years ago, according to estimates. The fifth-largest planet in the solar system is Earth. It has a circumference of about 8,000 kilometers.

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Answer:

AA+b Ac+b

Explanation:

Answer: 96.7072445

Explanation: F = 1/T

Chlorine has higher electronegativity

This is the tendency of an element to attract electron to itself. According to the periodic table, the electronegativity of an element increases from the left to the right across the period and decreases top to bottom down the group.

This trend exists due to the electronic configuration of the elements. Chlorine element has 7 valence electron in its outer shell and as such will easily accept an electron to itself to attain its octet configuration compared to magnesium that looses his two valence electrons to other elements in order to attain octet configuration.

The tendency of chlorine atom to attract electron makes it have a higher electronegativity compared to magnesium.

The reaction involving the reactants Magnesium and Sulphuric acid results in the formation of Magnesium sulphate and hydrogen

Mg (s) + dil. H2SO4 (aq) ➡️ MgSO4 (aq) + H2 (g)

Magnesium is a solid compound. When magnesium reacts with dilute sulphuric acid, it forms aqueous magnesium sulphate and hydrogen gas.

The type of reaction involved is single replacement reaction with both oxidation and reduction happening simultaneously. During the process, heat would be released becoming an exothermic reaction.

If concentrated sulphuric acid is used in place of dilute sulphuric acid, magnesium would react with concentrated sulphuric acid and forms 3 products namely magnesium sulphate, Sulphurdioxide and Water.

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62.00 nanometres per second is equivalent to 62 picometre per milliseconds

Picometers is a SI unit of length equal to 10−¹² meters with a symbol pm while nanometres is another SI subunit of length equal to 10-⁹ metres with symbol nm.

The conversion factor of picometers and nanometres is as follows:

1 picometre = 0.001 nanometre

This means that 62 nanometre will be equal to 62000 picometres.

1 second = 1000 milliseconds

62000/1000 = 62 pm/ms.

Therefore, it can be said that 62.00nm/s is the same as 62 pm/ms based on the conversion factor above.

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