14. How do you describe an atom in which the number of protons is equal
to the number of electrons?

Answer:

The physical reaction is...

Applying the baking soda/ water to the provided surface is a physical change, once a heat element is brought in, the releasing of heat is a chemical change; the baking soda changing color is in fact a chemical change because you are scorching it, it cant be undone.  

Explanation:

Answer:

The solute is the substance being dissolved.

The solvent is the substance dissolving the solute.

Therefore, the salt is the solute and the water is the solvent.

Explanation:

The salt is the solute.

The final concentration of sulfuric acid in terms of molarity is 0.08 M.

The molarity of a solution expresses the concentration in terms of the number of moles of solute per liter of solution. Since the volume of the solution increased, the molarity of the solution will change.

First, let us solve for the number of moles of sulfuric acid based on the initial concentration and volume. Volume must be converted to L in order for the units to have consistency.

number of moles = molarity*volume

number of moles = 0.40 M * 250 mL * ( 1 L/1000 mL)

number of moles = 0.10 moles

Then, let us solve for the new concentration by dividing the same number of moles with the new volume. The number of moles remains the same since there is no addition of solute.

final concentration in terms of molarity = number of moles / total volume

final concentration = 0.10 moles / [(250mL+1000mL)*(1L/1000mL)]

final concentration = 0.08 M

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Answer:

Explanation:

Here, we want to select an option that represents a chemical property of carbon

Let us take a look at the options;

a) This is a physical property that talks about the color of the gas at a certain temperature

b) This is a physical property that talks about the smell of the gas at a certain temperature

c) This is a physical property that talks about the weight in comparison to the same weight of air at that particular temperature

d) This is a chemical reaction as an entirely new substance will be formed

An epoxide is a heterocyclic organic compound with an oxygen ring. The acid protonates the oxygen, which opens the ring and starts the process.

What exactly is carbocation?

A carbocation is a molecule with three bonds and a positively charged carbon atom. To put it simply, they are essentially carbon cations. It was previously known as carbonium ion. A carbocation is any even-electron cation having a significant positive charge on the carbon atom.

Because of an incomplete octet, carbon cations are particularly reactive and unstable in general.

To put it simply, carbocations do not meet the octet rule because they lack eight electrons.

According to the question, carbon hybridization in carbocation will be sp2 with a trigonal planar structure. There is also an empty p orbital, suggesting that it is electron-deficient. Carbon contains six electrons in its valence shell. As a result, it is an electron-deficient species, also known as an electrophile.

An epoxide is a heterocyclic organic compound with an oxygen ring. The acid protonates the oxygen, which opens the ring and starts the process. A carbocation is now generated, which is quickly attacked by a water molecule.

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An epoxide is a heterocyclic organic compound with an oxygen ring. The acid protonates the oxygen, which opens the ring and starts the process.

What exactly is carbocation?

A carbocation is a molecule with three bonds and a positively charged carbon atom. To put it simply, they are essentially carbon cations. It was previously known as carbonium ion. A carbocation is any even-electron cation having a significant positive charge on the carbon atom.

An epoxide is a heterocyclic organic compound with an oxygen ring? The acid protonates the oxygen, which opens the ring and starts the process. A carbocation is now generated, which is quickly attacked by a water molecule.

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Answer:

5

Explanation:

They have a lot of kentic energy as they move around

The electronegativity periodic table is a chart that arranges elements according to their electronegativity, which is a measure of an atom's ability to attract electrons to itself. Electronegativity is a chemical property that reflects the relative tendency of an atom to draw electrons towards itself when it forms a chemical bond with another atom.

The electronegativity values are usually determined using the Pauling scale, which was developed by Linus Pauling and is widely used in chemistry. In this scale, the electronegativity of an element ranges from 0.7 for cesium to 4.0 for fluorine, with increasing electronegativity moving from left to right across a period and increasing as one moves down a group.

The electronegativity values can be useful in understanding chemical bonding and the behavior of molecules. For example, elements with high electronegativity values tend to form ionic bonds, while elements with low electronegativity values tend to form covalent bonds. Additionally, the electronegativity difference between two bonded atoms determines the type of bond, with larger differences indicating polar covalent bonds and smaller differences indicating nonpolar covalent bonds.

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Answer:

1 grams K2SO4 to mol = 0.00574 mol

10 grams K2SO4 to mol = 0.05739 mol

50 grams K2SO4 to mol = 0.28693 mol

100 grams K2SO4 to mol = 0.57386 mol

200 grams K2SO4 to mol = 1.14772 mol

500 grams K2SO4 to mol = 2.86929 mol

1000 grams K2SO4 to mol = 5.73858 mol

The statement “the yeast engages in photosynthesis, which produces oxygen gas” is incorrect. Yeast cells do not engage in photosynthesis to produce oxygen gas.

Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to produce glucose (a simple sugar), which serves as food for the plant.

Oxygen is also produced during photosynthesis.Yeast:Yeast is a unicellular fungus that converts sugar into carbon dioxide and alcohol. Yeast cells respire aerobically in the presence of oxygen and anaerobically in the absence of oxygen.

However, yeast cells do not perform photosynthesis. They do not have chloroplasts or pigments that are required for photosynthesis. Therefore, yeast cells cannot produce oxygen gas.Bio quizlet:Quizlet is an online learning platform that allows users to create and share flashcards, study guides, and quizzes.

It is a great resource for studying biology and other subjects. Students can create their own study materials or use existing ones created by other users. Quizlet provides an engaging and interactive way to learn and retain information.

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1.81 x 10^24 Br-ions are present in 1.00 moles of FeBr3

Avogadro's number of representative particles is included in one mole of a substance.

6.02 x 1023 particles make up 1 mole.

How many of each sort of atom there are in a typical particle is indicated by the chemical formula of the molecule. One mole of iron(III) ions and three moles of bromide (Br-) ions make up the formula FeBr3, which states that. The quantity of Br- ions is thus:

1.81 × 1024 Br- ions from 3 x 6.0223

When thinking about atoms and molecules, a mole is a helpful unit of measurement. Compounds are created when modest whole-number ratios of atoms mix. Quantities are reported in moles for the purpose of employing mathematical relationships in computations since atoms of various elements have different masses. For instance, the proportion of iron(III) ions to bromide ions in FeBr3 is the same as the proportion of moles of iron(III) ions to moles of bromide ions, but not the proportion of masses of the two types of ions.

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Answer:

A. because it came from a volcano

Explanation:

Answer: Igneous rock is formed by the melting and cooling of magma or lava.

Inside of Earth, magma slowly cools, creating rock with an irregular or rough texture and large crystals. Magma cooling inside Earth creates intrusive igneous rock.

Outside of Earth, lava cools very quickly, creating rock with a fine, grainy look or texture and small crystals. Lava cooling outside of Earth creates extrusive igneous rock.

Examples: granite, basalt, and pumice

Answer:

Supercontinent is a single landmass formed by the combination of many Earth's continental blocks or cratons.

Supercontinents form and split up every 400 or 500 million years and the last supercontinent was formed 300 million years ago, so it is possible that any of the modern continents will combine together to form a new supercontinent in future.

Answer:

Yes, modern continents could recombine to form a new supercontinent. Because the continents move at different rates and in different directions, it’s likely that in the future, continents will collide and join together.

Explanation: Edmentum's EXACT ANSWER SO DO NOT COPY!  Rewrite it in your own words.

Answer:

9.90

Explanation:

Given [H+] = 1.25 x 10^-10 M, we can calculate the pH using the formula:

pH = -log10([H+])

pH = -log10(1.25 x 10^-10)

Using logarithmic properties:

pH = -log10(1.25) - log10(10^-10)

Since log10(10^-10) is equal to -10:

pH = -log10(1.25) - (-10)

pH = -log10(1.25) + 10

Now, evaluating the logarithm using a calculator:

pH = -0.0969 + 10

pH = 9.9031

Therefore, the pH of the solution with [H+] = 1.25 x 10^-10 M is approximately 9.9031. Rounding it to two decimal places, the pH is approximately 9.90.

Answer:

There are seven periods in the modern periodic table.

Answer:

Seven periods

Explanation:

There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.

Answer: If a dark section of pavement absorbs more of the sun's energy than it reflects, then that section will feel warmer over the course of a sunny day.

Answer: A plant-based diet requires less water to produce the food as it suppress all animal based products. In addition to consuming a lot of water to produce meat , livestock farming also pollutes water source because of the waste produced by the livestock ends up in waterways.

Explanation:

Answer:

I'm doing this so you can give smithpaige347 Brainliest

Explanation:

The percent yield of \(Cl_2\) in the electrolytic decomposition of hydrogen chloride is 54.2%.

To calculate the percent yield of \(Cl_2\) in the electrolytic decomposition of hydrogen chloride, we need to compare the actual yield of \(Cl_2\) obtained to the theoretical yield of \(Cl_2\) that could have been obtained based on the amount of \(HCl\) used. The percent yield is then calculated as:

Percent yield = (actual yield / theoretical yield) x 100%

The balanced chemical equation for the electrolytic decomposition of \(HCl\) is:

2 \(HCl\)(aq) → 2 \(H2\)(g) + \(Cl_2\)(g)

The molar mass of \(HCl\) is 36.46 g/mol, and the molar mass of \(Cl_2\) is 70.90 g/mol. We can use the given mass of \(HCl\) to calculate the theoretical yield of \(Cl_2\):

moles of \(HCl\) = mass of \(HCl\) / molar mass of \(HCl\)

moles of \(HCl\) = 25.8 g / 36.46 g/mol

moles of \(HCl\) = 0.707 mol

According to the balanced equation, 1 mole of \(HCl\) produces 0.5 moles of \(Cl_2\). Therefore, the theoretical yield of \(Cl_2\) can be calculated as:

moles of \(Cl_2\) = 0.5 x moles of \(HCl\)

moles of \(Cl_2\) = 0.5 x 0.707 mol

moles of \(Cl_2\) = 0.354 mol

The theoretical yield of \(Cl_2\) in grams can be calculated by multiplying the moles of \(Cl_2\) by its molar mass:

theoretical yield of \(Cl_2\) = moles of \(Cl_2\) x molar mass of \(Cl_2\)

theoretical yield of \(Cl_2\) = 0.354 mol x 70.90 g/mol

theoretical yield of \(Cl_2\) = 25.11 g

The actual yield of \(Cl_2\) obtained from the experiment was 13.6 g.

Percent yield = (actual yield / theoretical yield) x 100%

Percent yield = (13.6 g / 25.11 g) x 100%

Percent yield = 54.2%

Therefore, the percent yield of \(Cl_2\) in the electrolytic decomposition of hydrogen chloride is 54.2%.

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A reasonable explanation for the disappearance of these fish is the high acidity affecting fish metabolism.

pH is a very important parameter to consider, as it has a direct effect on the metabolism and physiological processes of fish and other aquatic organisms. The pH tolerance range for fish is between 4.0 and 9.0, while the ideal index is between 6.5 and 8.0

With this information, we can conclude that The various fish species differ in terms of the best pH. The pH range between 6.5 – 9.0 is generally recommended for freshwater species. For marine species, the most recommended PH range is between 7.8-8.4.

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The best evidence that the moon has been extensively heated is the lack of volatiles.

The following are the characteristics of the Moon

:Mass of the moon.Lack of iron core.

Oxygen isotopes like the Earth.

Lack of volatiles.

Volatiles are materials with low boiling points that exist in solid or liquid form at the Earth's surface. Water and carbon dioxide are two examples of volatile materials. The lack of volatiles on the moon is a strong indication that the moon was subjected to high temperatures. It also indicates that volatiles have been expelled from the moon's surface due to the loss of gas molecules that occurred as a result of the heat. As a result, the absence of volatiles is the best evidence that the Moon has been extensively heated.

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question we have

\(volume = \frac{315}{3.75} \\ = 84\)

We have the final answer as

Hope this helps you

Answer:

The answer is A.

Explanation:

Universe was smaller and galaxies were closer together in past, galaxy collisions were common in past (distorted galaxies were common in early universe).

Answer:

Yes you are right.

Explanation:

Answer:

yeah it´s right

Explanation:

Commercial agriculture can lead to water-quality problems because water can be used for irrigation and washing chemical products.

The term commercial agriculture makes reference to the techniques to produce high yields in extensive crops.

Commercial agriculture may lead to contamination problems due to the use of herbicides and pesticides.

In conclusion, commercial agriculture can often lead to water-quality problems because water can be used for irrigation and washing chemical products.

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Recovery = (Weight of product recovered ÷ Theoretical yield) × 100% Recovery = (0.251 g ÷ 0.27594 g) × 100% Recovery = 91.08%Therefore, the % recovery of the reaction between 2,3-dimethyl-1,3-butadiene and maleic anhydride to form cyclic anhydride was 91.08%.

Diels-Alder Reaction   Diels-Alder reaction is a chemical process that joins a conjugated diene with a dienophile (a compound containing a double bond) to form a six-membered ring called a cyclohexene ring. It is a chemical reaction that can be used to make new carbon–carbon bonds. The reaction was discovered by two German scientists, Otto Diels and Kurt Alder, in 1928.In the Diels-Alder reaction between 2,3-dimethyl-1,3-butadiene and maleic anhydride to form cyclic anhydride, the % recovery was calculated using the following data:Weight of maleic anhydride used: 185 mg = 0.185 gVolume of diene used: 0.215 mLWeight of cyclic anhydride crystals recovered: 0.251 g% Recovery:We can calculate the percent recovery using the following formula:% Recovery = (Weight of product recovered ÷ Theoretical yield) × 100The theoretical yield of the product can be calculated from the balanced chemical equation as follows:2,3-dimethyl-1,3-butadiene + Maleic Anhydride → Cyclohexene-1,2-dicarboxylic AnhydrideThe molar mass of 2,3-dimethyl-1,3-butadiene is 68 g/mol. The molar mass of Maleic Anhydride is 98 g/mol. The molar mass of Cyclohexene-1,2-dicarboxylic Anhydride is 146 g/mol.Using these values, we can calculate the number of moles of each reactant: moles of diene used = (0.215 mL)(0.788 g/mL)/(68 g/mol) = 0.00248 mol moles of maleic anhydride used = 0.185 g/98 g/mol = 0.00189 mol The theoretical yield of cyclohexene-1,2-dicarboxylic anhydride = 0.00189 mol × 1 mol/1 mol = 0.00189 molThe theoretical yield of cyclohexene-1,2-dicarboxylic anhydride = 0.00189 mol × 146 g/mol = 0.27594 gNow, we can substitute these values into the percent recovery equation:% Recovery = (Weight of product recovered ÷ Theoretical yield) × 100% Recovery = (0.251 g ÷ 0.27594 g) × 100% Recovery = 91.08%Therefore, the % recovery of the reaction between 2,3-dimethyl-1,3-butadiene and maleic anhydride to form cyclic anhydride was 91.08%.

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Answer:

lonic bond i think

Explanation:

86.2 cm is equal to \(8.62\times 10^{-4}\)km.

Explanation:

Given:

A measurement,86.2 centimeters.

To find :

The equivalent of 86.2 cm from the given options.

Solution:

\(1 cm = 0.1 dm\\86.2cm=86.2\times 0.1 dm=8.62 dm\)

\(1 cm = 0.01 m\\86.2cm=86.2\times 0.01 m=0.862 m\)

\(1 cm = 0.00001 km\\86.2cm=86.2\times 0.00001 km=0.000862 km=8.62\times 10^{-4} km\)

\(1 cm = 10 mm\\86.2cm=86.2\times 10mm=862 mm\)

So, from this, we conclude that 86.2 cm is equal to \(8.62\times 10^{-4}\) km.

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The specific heat capacity of a substance is the amount of energy required to raise the temperature of 1g of the substance by 1K.

Calculating the change in temperature:

By substituting what we are given into the equation to solve for the unknow x we have;

Answer: Energy needed is 449.35J

Answer:

Most fire extinguishers work by separating the fuel from the oxygen. The oxygen comes from the air. It is the same oxygen we breathe. Since the oxygen has to be in contact with the fuel, if you can coat the fuel with something that keeps the oxygen away, the fire will go out. Some ways of using fire extinguisher are:

Explanation:

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