The use of water in a heat exchanger is taking advantage of water's A. high specific heat. B. significant expansion during boiling. C. solid state when frozen. D. polar molecular nature

The chemical reaction is shown by \(CaCl_{2} (aq) + K_{2} CO_{3} (aq) ----- > CaCO_{3}(s) + 2KCl(aq)\). The solvation of the KCl is shown in the image attached.

We know that a reaction is taking place when there is a change in the arrangement of the atoms that surround the reactants and then the products are formed. It is clear that there is a cleavage of the bods that surround the reactants and there is a recombination of these atoms as the products are formed. This recombination of the atoms now takes place in a different way so that we can be able to get new substances at the end of the reaction.

In this case we are looking at the kind of reaction that occurs between potassium carbonate and calcium chloride. One of the reactants is going to separate out of the solution and we would call it the precipitate. The other product is solvated by the water molecules.

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it will be called verbatim plagiarism, also called direct plagiarism

Answer:

Explanation:

Here, we want to know what happens when chemical bonds are formed

The formation of chemical bonds leads to the release of energy

What this means is that the formation of chemical bonds cause energy to be released. Of important note is that the breaking of chemical bonds does not cause energy to be released

Answer:

419 parts per million

Explanation:

The amount of carbon dioxide in Earth's atmosphere reached 419 parts per million in May, its highest level in more than four million years, the National Oceanic and Atmospheric Administration announced on Monday.

Hope it helps <3

Answer:

bonded

Explanation:

Compounds are two elements bonded together.

A mixture is multiple substances blended together.  The substances aren't bonded together and can easily be extracted  from each other.

Explanation:

the definition of genuine:

genuinly means honestly or truley

Answer:

A positively charged nucleus consisting of protons and neutrons

Explanation:

The atomic nucleus is a positively charged region located at the core of an atom that consists of positively charged protons and neutral neutrons while the negatively charged electrons make up the outer cloud (electrons are therefore not contained in the nucleus).

The number of moles of CO in the given conditions is 2.51 moles. To calculate the number of moles of CO in the given conditions, we need to use the Ideal Gas Law equation:

PV = nRT

Where:

P = pressure

V = volume

n = number of moles

R = gas constant

T = temperature

First, we need to convert the given temperature in Celsius to Kelvin by adding 273.15:

T = 93°C + 273.15 = 366.15 K

Now we can plug in the values we have:

P = 4.52 atm

V = 20.0 L

R = 0.0821 L.atm/mol.K (gas constant for CO)

T = 366.15 K

n = PV/RT = (4.52 atm x 20.0 L)/(0.0821 L.atm/mol.K x 366.15 K) = 2.51 moles

Therefore, the number of moles of CO in the given conditions is 2.51 moles.

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Answer:

Explanation:

The types and numbers of atoms that repeat to make up a substance, which is also known as its chemical composition, have a significant impact on the substance's properties.

For example, the number of atoms in a molecule can affect its mass and density, as well as its reactivity with other substances. The types of atoms present can affect the chemical reactivity, melting and boiling points, and other physical properties of the substance.

Additionally, the arrangement of atoms in a molecule can also affect its properties. For example, the orientation of atoms can affect the molecule's polarity, which can affect its solubility in different solvents.

In summary, the types and numbers of atoms that repeat to make up a substance can have a significant impact on its properties, including its chemical and physical properties.

Answer: Copper (II) Sulfate! (CuSO4)

Explanation:

This is because compared to the other salts, it is the visible color blue. The other ones are plain white. Happy holidays! Don’t stress :)

To determine the tomato's velocity when it hits the ground, we need more information. Specifically, we need the height from which the tomato was dropped and the tomato mass.

Without these details, it is impossible to calculate velocity accurately. The velocity of an object when it hits the ground depends on factors such as the height of the fall, the mass of the object, and any forces acting on it during the fall (such as air resistance).

If you can provide the necessary information, I can help you calculate the velocity of the tomato when it hits the ground.

The rate constant for the reaction is either 7.14×10−3 s−1 or 2.50×10−3 s−1, depending on which rate was used to calculate it.

The rate of the reaction is given by the equation:

Rate = -k[A]

where k is the rate constant and [A] is the concentration of the reactant.

Rate at t=140 s:

Rate = (8.00×10−2 M - 0 M) / (140 s - 0 s)

= 5.71×10−4 M/s

Rate at t=400 s:

Rate = (4.00×10−2 M - 0 M) / (400 s - 0 s)

= 1.00×10−4 M/s

Since this is a zero-order reaction, the rate of the reaction is constant, and we can use either rate to calculate the rate constant:

k = Rate / [A]

Using the rate at t=140 s:

k = 5.71×10−4 M/s / 8.00×10−2 M = 7.14×10−3 s−1

Using the rate at t=400 s:

k = 1.00×10−4 M/s / 4.00×10−2 M

= 2.50×10−3 s−1

The rate constant for the reaction is either 7.14×10−3 s−1 or 2.50×10−3 s−1.

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Based on the number of valence shell electron bond pairs between the atoms in a molecule or ion, the valence shell electron pair repulsion (VSEPR) theory is a model that is used to predict 3-D molecular geometry.

This model presupposes that electron couples will arrange themselves to reduce the consequences of their mutual repulsion. According to the valence-shell electron-pair repulsion (VSEPR) theory, electron pairs repel one another whether they are in bond pairs or lone pairs. In order to reduce repulsion, electron pairs will disperse as far as they can. According to the VSEPR hypothesis, each atom in a molecule will develop a shape that reduces the repulsion between electrons in its valence shell.

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The option that correctly describes a covalent species that has four electron groups around the central atom are:

It should be noted that when a molecule have four electron groups and it is been found around the central atom and this will orients the four groups in the direction of a tetrahedron.

However when there are  four atoms attached to these electron groups, in Tetrahedral Geometry, molecular shape  will also be also tetrahedral.

Instance of this is Methane (CH 4), in conclusion, in the case whereby all four electron pairs are bonding pairs, then it can be concluded that the  shape of the system is tetrahedral.

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missing options:

The ideal bond angle for a four-electron system is 109.5°.

If all four electron pairs are bonding pairs, the shape of the system is tetrahedral.

The eletron are not bonding in the system.

A bent shape is observed if there are two bonding pairs and two lone pairs.

Answer:

-OH functional group

Trust me

Answer:

a chemical equation is a method of representing chemical reaction by using symbols and formulas

Explanation:

First, you need to balance the equation:

N2    +  3 H2   ====>    2  NH3

                  so three moles of H2   result in  2 moles of NH3

                               ratio of   3:2

How many moles of NH3 is 36.5 gm  ??

   Using periodic table NH3 mole weight = 14.007  + 3*1.008 =17.031 g/mole

     36.5 g / 17.031 g/mole = 2.14 moles  of NH3

Using the ratios above   3/2 = x / 2.14   shows x = 3.21 moles of H2 needed

The weight percent of each element in the compound. is given below.

The mass percent of C = 24%

The mass percent of H = 4%

The mass percent of Cl = 50%

The mass percent of N = 9.8%

The Mass percent of oxygen = 12.2%

The following formula is used to calculate the mass of each component element in a sample of the compound:

The weight of C:

In 1 mole of CO2, there is 1 mole of carbon.

In 0.138 g of CO2, there will be:

0.138 g / 44 g * 12 g = 0.0368 g

H's mass:

1 mole of H2O contains 2 moles of hydrogen.

0.0566 g of H2O will contain the following quantity of H:

0.0566 g / 18 * 2 * 1 = 0.00628 g

volume of Cl;

In 1 mole of AgCl, there is 1 mole of Cl.

In 0.251 g of AgCl, the mass of Cl will be:

0.251 g / 143.5 g * 35.5 g = 0.0621 g

N's mass:

In 1 mole of NH3, there is 1 mole of N.

In 0.251 g of NH3, the mass of N will be:

0.0238g / 17.0 g * 14 g = 0.0196 g

Each element's mass percentage will be:

Mass proportion of C:

mass percent is equal to 0.0368/0.15 * 100.

24% mass percent

Mass proportion of H:

mass percent is equal to 0.00628/0.15 * 100%.

4% mass percent

Cl mass percentage;

Mass proportion of Cl:

mass percent is equal to 0.0621/0.125 * 100%.

50% mass percentage

N mass percentage:

Mass percent is equal to 0.0196/0.2*100%.

9.8% mass percent

Oxygen mass percentage equals 100 minus (24 + 4 + 50 + 9.8)

oxygen mass percentage: 12.2%

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This exercise is related to the subject of Structured Thinking. See the definition of structured thinking below.

The process of developing a structured framework to address an unstructured situation is known as structured thinking.

Structured thinking is a strategy of problem-solving that entails breaking a huge problem into smaller ones in order to tackle the larger problem more quickly and effectively.

Categorizing things and identifying themes are two subjects under structured thinking.

To categorize anything requires:

Identifying themes entails:

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Answer:

Explanation:

The pH of 0.02 M hydrochloric acid is approximately 1.7.

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We need a color key to determine the pH of a solution using pH indicator paper.

pH is the measure of the hydrogen ions concentration in a solution which means the measure of acidity or alkalinity of the solution.

Generally, the pH scale ranges from 0 to 14.

A solution having a pH less than 7 is said to be acidic whereas a solution having a pH more than 7 is considered basic or alkaline

A solution having a pH equal to 7 is said to be neutral

pH indicators are weak acids that are found as natural dyes and that change color to show how many H⁺ (H3O⁺) ions are present in a solution.

The substance you are analyzing has an acidic, basic, or neutral pH value, which is calculated from the negative logarithm of H⁺ concentration.

The paper form of pH indicators is typically dipped into solutions and then removed for comparison against a color/pH key. Usually, the liquid form of pH indicators is added directly to solutions.

Thus, a color key or pH key is needed to determine the pH of a solution using pH indicator paper.

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Answer:

color key

creating a color key

have known PH values

A

Explanation:

hope this helps its all the answers in one

Answer:

Lead iodide (II) is an inorganic compound, lead salt and hydrogen acid, with the PbI2 formula.

Answer:

C

Explanation:

I believe it would be weather because climate is the average temperature of a area. This leads me to believe it is c.

I am sorry if this is incorrect, but that is what I would've went with if I was taking the test. :)

Answer:

Guys’ search it up on math thank me later

Explanation:

dhsjdjsusysgtjghtd fjfhfhcchdh

2 atoms

..................

Electrons are transferred from atoms of sodium to atoms of phosphorous The sodium atom looses electron and the phosphorus atoms gains electrons.

The electron is a subatomic particle with an elementary electric charge of -1. Electrons are the first generation of the lepton particle family and are widely regarded as elementary particles due to the lack of known components or substructure.

This transfer causes the sodium atoms  to acquire positive charge and phosphorous to acquire negative charge .

Thus, the sodium and phosphorus atoms strongly attract with each other.

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Your question is incomplete, most probably, your question was

Complete the paragraph about the formation of sodium phosphide.

Electrons are transferred from atoms of

and the phosphorus atoms

to atoms of

C. This transfer makes the sodium atoms

As a result, the sodium and phosphorus atoms strongly

each other.

Answer:

1.904 ppm

Explanation:

Concentration of drug in units of ppm = mass of solute / (mass of solution ) × 1000000

mass of blood = density of blood × volume = 1.05 g / ml × 5000 ml = 5250  g

mass of solution = mass of blood + mass of solute ( statin) = 5250 + 0.01 g  = 5250.01 g

Concentration of drug in units of ppm = (0.01 g / 5250.01 g) × 1000000 = 1.904 ppm

I hope this helps!!

logarithm and power 10 are inverse operations

The answer is [OH-] = 10^-(pOH)

and, if pOH = 2.77