Two common liquids, water and peroxide, are both formed with atoms of hydrogen and oxygen. If both substances discussed above are made of hydrogen and oxygen, how is the make-up of the two substances different?.

According to the balanced equation, 31.7 grams of nitrogen gas (N₂) reacting with excess hydrogen gas (H₂) will produce a 2.264 moles of ammonia gas (NH₃).

To determine the moles of ammonia formed, we need to convert the given mass of nitrogen gas to moles using its molar mass and the stoichiometric ratio of the balanced equation.

The molar mass of nitrogen gas (N₂) is 28.02 g/mol. To calculate the number of moles of nitrogen gas, we divide the given mass by its molar mass:

31.7 g / 28.02 g/mol = 1.132 mol

According to the stoichiometry of the balanced equation, the ratio between nitrogen gas and ammonia gas is 1:2. This means that for every 1 mole of nitrogen gas, 2 moles of ammonia gas are produced.

Therefore, using the stoichiometric ratio, we can determine the moles of ammonia formed:

1.132 mol N₂ * (2 mol NH₃ / 1 mol N₂) = 2.264 mol NH₃

Thus, upon the complete reaction of 31.7 grams of nitrogen gas with excess hydrogen gas, 2.264 moles of ammonia gas will be formed.

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The compound that has ionic bonds is KBr (potassium bromide). Therefore the correct option is Option E.

Ionic bonds develop when two atoms with significantly differing electronegativities create a bond in which one atom (the metal) contributes electrons to the other atom (the non-metal). Potassium (K) is a metal in KBr, while bromine (Br) is a nonmetal. The electronegativity of K is low, whereas that of Br is high. When K and Br bond, K contributes its valence electron to Br, resulting in an ionic bond.

The other chemicals listed, on the other hand, have covalent bonding. When atoms with similar electronegativities share electrons in order to produce a more stable electron configuration, covalent bonds occur.

a. H2O has covalent bonds;

b. O2 contains covalent bonds; and

c. Ne is a noble gas that does not create bonds.

d. CO contains covalent bonds.

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Covalent bonds are formed when atoms of elements share electrons.

A covalent bond is a type of chemical bond where two atoms are connected to each other by the sharing of two or more electrons.

These electron pairs are known as shared pairs or bonding pairs and they form when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

For example, in a chemical compound HCl, it can be said that hydrogen and chlorine are joined by covalent bonding.

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Answer:

it produce atp

Explanation:

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

Cellular respiration is a metabolic process that occurs in the cells of an organism. Carbon dioxide from cellular respiration aids the process of photosynthesis.

Cellular respiration is a process that takes place in the organism's cell where the cellular oxygen or chemical energy gets utilized and converted to ATP and waste like carbon dioxide.

The carbon dioxide released by the organism in the atmosphere is used by plants in the process of photosynthesis. Photosynthesis is a process that utilizes carbon and water to form glucose and oxygen.

Therefore, cellular respiration supports the process of photosynthesis by option D. producing carbon dioxide.

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According to the department of transportation defines hazardous materials as any substance in any form or quantity that poses an unreasonable risk to Health ,Safety, and property when transported.

hazardous materials are defined as a substance or material which can cause any kind of harm to people or animals.

To produce goods and other necessities for today's society, many factories and industries use hazardous materials.

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The answer is A - Volumetric Flask!

Answer:

Weigh the empty crucible, and then weigh into it between 2 g and 3 g of hydrated copper(II) sulphate. Record all weighings accurate to the nearest 0.01 g.

Support the crucible securely in the pipe-clay triangle on the tripod over the Bunsen burner.

Heat the crucible and contents, gently at first, over a medium Bunsen flame, so that the water of crystallisation is driven off steadily. The blue colour of the hydrated compound should gradually fade to the greyish-white of anhydrous copper(II) sulfate. Avoid over-heating, which may cause further decomposition, and stop heating immediately if the colour starts to blacken. If over-heated, toxic or corrosive fumes may be evolved. A total heating time of about 10 minutes should be enough.

Allow the crucible and contents to cool. The tongs may be used to move the hot crucible from the hot pipe-clay triangle onto the heat resistant mat where it should cool more rapidly.

Re-weigh the crucible and contents once cold.

Calculation:

Calculate the molar masses of H2O and CuSO4 (Relative atomic masses: H=1, O=16, S=32, Cu=64)

Calculate the mass of water driven off, and the mass of anhydrous copper(II) sulfate formed in your experiment

Calculate the number of moles of anhydrous copper(II) sulfate formed

Calculate the number of moles of water driven off

Calculate how many moles of water would have been driven off if 1 mole of anhydrous copper(II) sulfate had been formed

Write down the formula for hydrated copper(II) sulfate.

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Explanation:

Answer:

Option C

Explanation:

Its totally chemical change

After a radioactive decay that emits gamma radiations, the new resultant isotope has the same mass vs. the old isotope.

             Isotopes refer to two or more atoms that have the same atomic number and the same position in the periodic table. They only differ in their nuclear position and their atomic arrangements.

             Radioactive decay refers to the release of energy in the form of ionizing radiations like alpha, beta, and gamma rays. When energy is released in the form of gamma rays, there is no change in the number of atoms or the mass of the substance. It retains its original mass similar to that of the older isotope.

               The gamma rays do not contain any mass. Thus during its emission, no changes in the mass take place. However, the energy of the substance changes with the gamma rays.

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The product of the Claisen condensation is a β-keto ester, with the specific structure depending on the starting ester molecules.

The reaction between 1,3-diphenylacetone and acrolein in the presence of trimethylamine proceeds through a Michael addition followed by an intramolecular aldol condensation. The mechanism can be illustrated as follows:

Step 1: Michael Addition

The nucleophilic trimethylamine (CH3)3N attacks the electrophilic α,β-unsaturated carbonyl group of acrolein, forming an intermediate.

(CH3)3N + CH2=CHCHO → (CH3)3NCH2-CH=CHO

Step 2: Intramolecular Aldol Condensation

The nucleophilic α-carbon of the intermediate attacks the carbonyl carbon of 1,3-diphenylacetone, forming a new carbon-carbon bond. This is followed by elimination of trimethylamine, resulting in the formation of the product.

(CH3)3NCH2-CH=CHO + C6H5COC6H5 → C18H16O + (CH3)3N

The product formed is C18H16O, with the specific structure depending on the positions of the phenyl groups on the 1,3-diphenylacetone starting material.The Claisen condensation is a reaction between two ester molecules that leads to the formation of a β-keto ester. The mechanism can be illustrated as follows:

Step 1: Deprotonation

An alkoxide ion (RO-) abstracts a proton from one of the ester molecules, forming an enolate ion.

CH3CH2C(O)OCH2CH3 + CH3CH2C(O)OCH2CH3 → CH3CH2C(O)O-CH2CH2CH2CH3 + CH3CH2C(O)OCH2CH3

Step 2: Nucleophilic Attack

The enolate ion attacks the carbonyl carbon of another ester molecule, forming a tetrahedral intermediate.

CH3CH2C(O)O-CH2CH2CH2CH3 + CH3CH2C(O)OCH2CH3 → CH3CH2C(O)-CH2CH2CH2CH3 + CH3CH2C(O)O-CH2CH2CH2CH3

Step 3: Elimination

The tetrahedral intermediate eliminates an alkoxide ion, resulting in the formation of the β-keto ester.

CH3CH2C(O)-CH2CH2CH2CH3 + CH3CH2C(O)O-CH2CH2CH2CH3 → CH3CH2C(O)-CH2CH2CH2CH3 + CH3CH2COO-

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.

Magnesium is a main-group metal element in period number 3 of the periodic table, which is the correct answer.

Period number 3 of the periodic table has eight elements that are arranged in order of increasing atomic number. These elements are sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, and argon.

The period number signifies the highest energy level that the element's electrons occupy.

The metallic character of the elements reduces, and the non-metallic character increases as you move across a period. Magnesium is a silvery-white metal and the eighth most abundant element in the Earth's crust.

Magnesium is used in alloys, pyrotechnics, and flares, and it is also used to manufacture lightweight and durable products like aircraft parts.

Magnesium is a main-group metal element and is located in Group 2 of the periodic table. It is in the same group as beryllium, calcium, strontium, barium, and radium.

It is a highly reactive metal that readily loses its two outermost electrons to form a stable cation with a 2+ charge. Magnesium ions have a high affinity for water molecules, which makes them essential in biological systems as well.

Magnesium is an essential element for human health, and it is involved in many physiological processes, including muscle contraction and relaxation, nerve transmission, and energy metabolism.

Magnesium deficiency can cause a variety of health problems, including muscle weakness, cramps, and irregular heartbeats.

In conclusion, magnesium is a main-group metal element in period number 3 of the periodic table.

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Answer:

Correct Answer is no. 2.

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4. Bubbles formed.

The atomic number (Z) of Iminium (Im) is 125, and since alpha decay results in the loss of 2 protons, Z will decrease by 2, giving a value of 123 for the newly formed element.

After a decay event by alpha decay, the Iminium (Im) atom with atomic number 125 (Z) and atomic mass number 282 (A) will change. Alpha decay involves the loss of 2 protons and 2 neutrons from the nucleus. Therefore, the new values for A and Z will be:

- New atomic number (Z) = 125 - 2 = 123
- New atomic mass number (A) = 282 - 4 = 278

So, the atom that was formerly 282Im will now have an atomic number (Z) of 123 and an atomic mass number (A) of 278.

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Answer:

10 neutrons

Explanation:

N=Z-A ie. number of neutrons=mass number-atomic number

N=19-9=10

Answer:

A. teeth

Explanation:

It contains a protien called collagen, which absorbs chemical elements from the food that an individual eats, so scientists are able to obtain information about animals diet by studying the chemical elements found in fossilised teeth.

Answer:

Teeth

Explanation:

They can see the shape of the teeth and try to figure out what they ate

The ideal pressure exerted by the helium gas is 426580 Pa.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that the parameters of Helium gas are

T = 77 K

m = 2 g

V = 1.5 L = 1.5 x 10¯³ m³

Mr He = 2

By substituting the given parameters, we can calculate the pressure

P . V = n . R . T

P . 1.5 x 10¯³ = 2 / 2 . 8.31 . 77

P = 426580 Pa

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Percentage of the sample that was actually tartaric acid is : {(m - 0.360)/m} x 100.

Tartaric acid is a white, crystalline organic acid that occurs naturally in many fruits, most notably in grapes, but also in bananas, tamarinds, and citrus.

Given is that the initial mass of the tartaric acid sample was measured to be 0.360 g, therefore it was not a pure sample.

Titration is the slow addition of one solution of a known concentration (called a titrant) to a known volume of another solution of unknown concentration until the reaction reaches neutralization, which is often indicated by a color change. Assume the final was {m} grams. Then, we can write percentage of the sample that was actually tartaric acid as -

{(m - 0.360)/m} x 100

Therefore, percentage of the sample that was actually tartaric acid is : {(m - 0.360)/m} x 100.

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A hydrogen bond is a type of chemical bond that forms when an electronegative atom (such as oxygen or nitrogen) forms an electrostatic attraction to a hydrogen atom that is already covalently bonded to another electronegative atom.

In order for a hydrogen bond to form, three conditions must be met:

1. The hydrogen atom must be covalently bonded to an electronegative atom such as oxygen or nitrogen

2. The hydrogen atom must be partially positively charged (has a partial positive charge). This is due to the fact that the covalently bonded electronegative atom has a stronger pull on the shared electrons than the hydrogen atom does.

3. The electrostatic attraction between the partially positively charged hydrogen atom and a nearby electronegative atom must be strong enough to overcome the repulsive forces between the two atoms.

When these three conditions are met, a hydrogen bond can form.

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The visual indicator that enough of a drying agent , such as anhydrous MgSO4 or CaCl2 has been added to properly dry an organic solution is that the drying agent will move freely like a powder around the solution .

Because the anhydrous form is hygroscopic ( readily absorbs water from the air ).

What is the work of anhydrous magnesium sulphate ?

Magnesium sulphate is frequently used in the laboratory as an indicator, especially after aqueous work-up . aqueous work-up is a common technique in the lab to get rid of residual impurities after completion of a reaction . for this the organic reaction is cooled to room temperature and mixed with water .specific impurities will then diffuse into the aqueous phase and can be separated with a separatory funnel .

unfortunately some residual water will stay in the organic phase and this can have negative impact for characterization of compound . therefore Magnesium sulphate is added ,which is able to catch the residual water in its crystal lattice .after filtration of the solid magnesium sulfate ,the water is reduced to non-significant amount and the compound ready for further investigation.

Similarly , calcium chloride is strongly hygroscopic ( absorbs water from the environment ) , so it removes moisture from the air ,making it dryer . this results in water  in the substance to be dried to evaporate into the drier air and this cycle repeats until the system reaches an equilibrium.

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Answer:

If one increases the temperature of a gas in a sealed, rigid container, the density of gas will not change.

The key to this answer lays in the ideal gas equation:

        pV = nRT

Thus, one can write:  n = (m)/(M)where m is the mass of the gas and M is the molar mass of a gas.  

         pV = (m)/(M) RT

Hence, if one decides to divide the entire equation with volume, V, one may write:

        p = (m)/(VM) RT

ρ = (m)/(V), where ρ is density

        p = (ρ)/(M) RT

If one increases the temperature, in order to keep balance, the pressure will be increased, also.  Container is rigid, so that means the volume is constant.

However, this will not affect the density because there is no difference in volume (V = const.) or the amount of gas (n = const).

If one had a container with a piston, yet, constant pressure, the change of the temperature will impact the density.  

Explanation:

Answer:

Neutralization reactions occur when two reactants, an acid and a base, combine to form the products salt and water.

The organ that is used to detect the product of a neutralization reaction is the sense of taste.

When a neutralization reaction occurs between an acid and a base, it results in the formation of a salt and water. The salt produced in the reaction may have a distinct taste, depending on its chemical properties. For example, when hydrochloric acid reacts with sodium hydroxide, the products are sodium chloride and water. Sodium chloride, commonly known as table salt, has a characteristic salty taste.

Similarly, other salts formed from neutralization reactions may have different tastes. For instance, magnesium hydroxide reacting with acetic acid produces magnesium acetate, which has a slightly sweet taste. By using our taste buds, particularly on the tongue, we can detect and identify the taste of the salt formed during a neutralization reaction.

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Answer:

there is one carbon atom and there are two oxygen atoms. So, in total there are three atoms.

Explanation:

Answer:

Oil and vinegar separate because it is a suspension

Explanation:

When you let suspensions sit the particles begin to layer out, in the salad dressing the oil layers out on top of the vinegar. The two layers of oil and vinegar don't actually dissolve in each other. The layer with the lower density (oil) floats on top of the layer with a higher density (vinegar)

Water and vinegar are both hydrophilic and mix, whereas the oil is hydrophobic. Oil and vinegar separate because it is a suspension

Hydrophilic molecule are water-loving polar molecule.

They interact with water or they are dissolved in water or water like polar solvent.

For instance, the phospholipid molecules of the plasma membrane has a hydrophilic phosphate group.

Hydrophobic is a water hating  substance which can not dissolve in water, but other non-polar solvent.

Thus hydrophobic substances are lipophilic in nature  and the hydrophobic solvents are used to  separate water-immiscible substances from water.

The layers of oil and vinegar can not  dissolve with each other. The oil layer has the  lower density floats on top of the layer with a higher density product called vinegar.

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Energy consumption in the cloud refers to the amount of energy used by data centers and other infrastructure that provide cloud computing services.

This includes the energy used to power servers, cooling systems, and networking equipment, as well as the energy used to transport data over networks.

As cloud computing has become increasingly popular, energy consumption has become a significant concern for both cloud providers and users, as the energy required to run data centers can be substantial. To mitigate this, cloud providers are investing in more energy-efficient technologies and practices, such as using renewable energy sources and implementing more efficient cooling systems.

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Answer:

D. the solvent particles to be spread further out and have more to move, increasing their kinetic energy.

Explanation:

Answer:

Scientists must look in their experiment/data to check for accuracy because they don't want to make any mistakes, and most importantly have to make sure they have the right information to proceed.

Explanation:

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