How many grams of oxygen would be needed to completely react with 254 g of tristearin, C57H110O6, by the following reaction:


2C57H110O6 + 163O2 114CO2 + 110H2O

Answer:

The answer is true

Explanation:

An Arrhenius acid is a substance that increases the concentration of hydrogen ions in solution when it is dissolved in water.

Answer:

false

Explanation:

The maximum concentration of Ca²⁺(aq) which can be present in drinking water without lowering the concentration of the F⁻(aq) below the ideal level will be closest to 0.025 M. Option B is correct.

To solve this problem, we can use the concept of the equilibrium constant (Kp) and the stoichiometry of the reaction.

The given equilibrium reaction is;

CaF(s) ⇌ Ca²⁺(aq) + 2F⁻(aq)

The equilibrium constant expression for this reaction is:

Kp = [Ca²⁺][F⁻]²

We are given the equilibrium constant (Kp) as 4.0 x 10⁻¹¹ and the concentration of F-(aq) as 4.0 x \(10^{(-M)}\). We need to determine the maximum concentration of Ca²⁺(aq) that can be present without lowering the concentration of F⁻(aq) below the ideal level.

Let's assume the maximum concentration of Ca²⁺(aq) as x M. Since the stoichiometry of the reaction is 1:2, the concentration of F⁻(aq) will be twice the concentration of Ca²⁺(aq).

Thus, the concentration of F⁻(aq) would be 2x M.

Now, substitute the concentrations into the equilibrium constant expression:

Kp = (x)(2x)²

4.0 x 10⁻¹¹ = 4x³

Rearrange the equation;

x³ = (4.0 x 10⁻¹¹) / 4

x³ = 1.0 x 10⁻¹¹

Take the cube root of both sides:

x ≈ 0.025

Therefore, the maximum concentration of calcium ions will be 0.025.

Hence, B. is the correct option.

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To obtain a more reliable or precise value for the optimum temperature in an experiment, several changes can be made. Here are some suggestions: Replicate the experiment, Increase sample size, Use a narrower temperature range, Utilize more precise temperature control etc

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The molar molar concentration of the solution is 1.4 M. of a solution made by  dissolving 2. 9g sodium acetate, NaC2H3O2 in water.

What is the molar concentration of a solution made by dissolving 2. 9g sodium acetate, NaC2H3O2 in water to a total volume of 25mL?

To calculate the molar concentration of the solution, we first need to determine the number of moles of sodium acetate present. This can be done using the formula:

moles = mass / molar mass

Where mass is the amount of sodium acetate in grams and molar mass is the molar mass of sodium acetate (82.03 g/mol).

so, moles = 2.9 g / 82.03 g/mol = 0.035 moles

Next, we can use the formula for molarity (M):

M = moles of solute / liters of solution

We know that the total volume of the solution is 25 mL, we will convert it into liter (L)

so, M = 0.035 moles / (25 x 10^-3 L) = 1.4 M

Therefore, the molar concentration of the solution is 1.4 M.

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The 2,4-dinitrophenylhydrazine reagent, also known as Brady's reagent, cannot be used to distinguish between an aldehyde and a ketone because both of these functional groups react with the reagent to form a yellow to orange precipitate.

The reaction occurs because both aldehydes and ketones contain a carbonyl group (C=O), which reacts with the hydrazine in the reagent to form a hydrazone.

The 2,4-dinitrophenylhydrazine reagent is not specific enough to distinguish between an aldehyde and a ketone. In order to distinguish between an aldehyde and a ketone, a different reagent must be used. One common reagent used for this purpose is Tollens' reagent, which contains silver ions.

When Tollens' reagent is added to an aldehyde, the silver ions are reduced to metallic silver, which forms a mirror-like coating on the inside of the test tube. Ketones do not react with Tollens' reagent, so no silver mirror is formed. This allows for the differentiation between an aldehyde and a ketone.

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The pH changes slowly within a buffer region and rapidly outside of the buffer zone.

Buffers are designed to resist changes in pH. They are able to do this because they contain a weak acid and its conjugate base, or a weak base and its conjugate acid.

When an acid or base is added to a buffer, the buffer will react with it to minimize the change in pH. For example, if an acid is added to a buffer, the buffer's conjugate base will react with the acid to form water and the weak acid, thus minimizing the change in pH.

However, outside of the buffer zone, there are no buffer components present to react with the added acid or base, so the pH will change rapidly.

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Transesterification is a chemical reaction that involves the exchange of an ester group in one molecule with an alcohol group in another molecule.

In the case of the given question, the transesterification reaction of ethyl butanoate with propanol will result in the formation of ethyl propanoate. This is because the ester group of ethyl butanoate is replaced with the alcohol group of propanol, resulting in the formation of a new ester, ethyl propanoate. This reaction is often used in the production of biodiesel, where vegetable oils are transesterified with methanol or ethanol to form fatty acid methyl or ethyl esters. Propanol, on the other hand, is not commonly used in transesterification reactions due to its high cost and low reactivity compared to methanol and ethanol.

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Answer:

Aluminium (A1) -Used in the production of duralumin alloy for use in the construction of aeroplane bodies. 3. Silicon (Si) -To make microchips 4. Sulphur (S) -To make matches, fireworks and for the manufacture of sulphuric acid 5.

Explanation:

Hope this helped!

Answer:

yes

Explanation:

we use different elements and compounds in our life ex salt and iron but most of the substances found in our environment are mixture btw scientists need to classified substances to work with our substances and to study pure substances hope it helps u

Answer:

Option (3) is the correct answer.

Explanation:

The electron dot structure corresponds to an element in the s-block that has an unpaired dot.

So, from this, we can conclude electron dot structure corresponds to an element in the s-block that has an unpaired dot.

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Answer:

C

Explanation:

Because you can't open your lamps when there's no electricity or if it's brownout,,,,

After calculating  and investigating the evaluated specific heat capacity of the given metal for the required question is 0.385 J/g°C

The specific heat capacity of a metal could be evaluated using the formula

Q = m x c x ΔT

here

Q = heat lost by,

m = mass of the sample,

c = specific heat capacity of the given metal,

ΔT = change in temperature.

given,

mass of the metal object  21.2g which was  heated to 97°C then send to an insulated vessel having 86.0g of water at 20.5°C.

The  given water temperature rises reach the same final temperature of 23.5°C.

We have to calculate Q

Q metal = -Q water

m metal x c metal x ΔTmetal = -m water x c water x ΔTwater

here

ΔTmetal = 23.5 – 97

= -73.5°C

ΔTwater = 23.5 - 20.5

= 3°C.

Staging the values in the given formula

(21.2g) x c metal x (-73.5°C)

= -(86.0g) x (4.184) x (3°C)

Calculating concerning c metal

c metal = 0.385 J/g°C

After calculating  and investigating the evaluated specific heat capacity of the given metal for the required question is 0.385 J/g°C

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When the two gases come together, an NH4Cl white ring will develop. Let x be the HCl's journey distance. The distance covered by the NH3 is thus equal to 1.463x. So, the white ring will form 0.8 m away from the HCl end.

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\

The functional groups that could give a positive test with DNPH are ketones and aldehydes.

A positive test with 2,4 dinitrophenylhydrazine (DNPH) indicates the presence of a carbonyl group (C=O). Therefore, the functional groups that could give a positive test with DNPH are ketones and aldehydes.

By dissolving DNPH in a solution containing methanol and a little amount of strong sulfuric acid, Brady's reagent or Borche's reagent is created. This mixture is employed to find ketones and aldehydes.

Dinitrophenylhydrazone, a precipitate that is yellow, orange, or red, is a sign of a positive test.

Hydrocarbons, amines, alcohols, and carboxylic acids do not contain a carbonyl group and hence, they will not give a positive test with DNPH.

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Most naturally occurring gases are a mixture. This statement is true about most naturally occurring gases.Gases are one of the four fundamental states of matter (solid, liquid, gas, and plasma). So correct answer is C

They are distinguished from other states by their ability to conform to the form of the container in which they are stored (assuming that the container is not entirely sealed). Gases are made up of tiny, discrete molecules that are spread out throughout a large volume, and these molecules can be subjected to an external force such as heat or pressure, which will cause the gas to compress or expand. These molecules do not interact with one another in the same way that liquids or solids do, as they are free to move and do not have a definite shape or volume.

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Answer:

The statement that is generally true about stable isotopes is:

A. Only I - The nucleus of a stable isotope contains an equal number of neutrons and protons, which helps to maintain the stability of the nucleus.

Statement 2 is not necessarily true for stable isotopes as the nuclear charge and the peripheral charge due to the orbiting electrons may not always be equal and opposite.

Statement 3 is false as stable isotopes do not undergo radioactive decay into more stable isotopes. This is because stable isotopes have a balanced number of protons and neutrons, which results in a stable nucleus that does not decay.

Therefore, the correct answer is A. Only I

Answer:

092) Icosane

093) Ethene

Explanation:

092) The given compounds are;

Decane C₁₀H₂₂; Viscosity = 0.850 mPa·s (25°C)

Ethene C₂H₄ (gas); Viscocity ≈ 0.01038 m

Icosane C₂₀H₄₂; Solid at room temperature

Methane CH₄; gas at room temperature

The viscosity of the given carbon and hydrogen compounds is observed to increase with their molar masses

Therefore, icosane, which is a solid at room temperature, has the highest viscosity (resistance to deformation) out of the given compounds

093) Polymers are made from monomer alkene units, therefore, ethene, which is the only alkene among the given compounds can be used to produce a polymer

Polyethene is formed by the polymerization of ethene whereby molecules of ethene are joined together to form poly(ethene)

Answer: For disadvantages, 1,2, and 3.

To figure out where the fallen out boxes go to in the periodic table wall we need to perform a couple of experiments. The kind of experiment would help you categorize some of the elements is:

C) All of the options are correct.

A) Observing the shininess of the elements can help categorize them based on their luster. Some elements, like metals, tend to be shiny, while non-metals may have a dull appearance. This can give clues about the type of element and its position in the periodic table.

B) Testing the ductility of the elements can provide information about their ability to be stretched or deformed without breaking. Metals, for example, are often ductile, while non-metals tend to be brittle. This characteristic can also help in categorizing elements within the periodic table.

D) Measuring the electrical conductivity of the elements can distinguish between metals, which typically conduct electricity well, and non-metals, which are usually poor conductors. This property is closely related to the arrangement of electrons in the atoms and can aid in placing elements in the appropriate regions of the periodic table.

Therefore, all of these experiments can be useful in categorizing elements and determining their placement in the periodic table.

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The complete question is:

To figure out where the fallen out boxes go to in the periodic table wall we need to perform a couple of experiments. What kind of experiment would help you categorize some of the elements?

A) Observe their shininess

B) Test their ductility

C) All of the options are correct

D) Measure their electrical conductivity

Answer:

C.

Explanation:

Answer A is incorrect because a compound doesn't have to be made with only metals.

Answer B is incorrect because that is actually the definition of a pure element.

Answer C is correct because to make a compound, there has to be a chemical reaction where bonds are formed and an entirely new substance is created.

Answer D is incorrect because compounds cannot be separated by physical means.

Hope this helps :D

a.

Ionic bond is a bond in which there is complete transfer of valence electrons between atoms.

The atom that loses the valence electron is called the electron donor while the atom that accepts the electron is called the electron acceptor.

Ionic bond usually occurs between metals and non metals.

Ionic bond is a bond in which there is complete transfer of valence electrons between atoms.

b.

The force of attraction between Na⁺ and Cl⁻ forms the ionic bond.

Since the atoms are now charged, the force of attraction between them forms the ionic bond.

c.

The force of attraction between Mg²⁺ and O²⁻ forms the ionic bond.

Since the atoms are now charged, the force of attraction between them forms the ionic bond.

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An ionic or electrovalant bond is a type of chemical bond, which is formed  from two ions (charged atoms by loosing or gaining electrons) having opposite charges.

Ionic bonds are formed from the transfer of electrons from one atom to another. As the electrons are transferred there occurs a positively charged ions (cations) and a negatively charged ions (anions). These ions are held together in a crystal lattice structure by the strong electrostatic attraction between the positively charged cations and negatively charged anions.

The electrons are transferred as the atoms have tendencies to achieve a stable electronic configuration. They do this to attain a stable atomic structure. By transferring the electrons they attain their octet or duplet.

Sodium chloride(NaCl) is formed when the atom of sodium combines chemically with chlorine atom to generate an ionic compound.

Since sodium has an atomic number of 11, its electronic configuration is 2, 8, 1. There is only one electron in the outermost shell of a sodium atom. Therefore, the sodium atom gives one electron to produce the sodium ion Na⁺.

Chlorine has an atomic number of 17. Hence, its electronic configuration is 2, 8, and 7. The chlorine atom contains seven electrons in its outermost shell and requires one more electron to create the inert gas’s stable, eight-electron configuration. Consequently, a chlorine atom accepts one electron and creates the negatively charged chloride ion (Cl⁻).

When sodium interacts with chlorine, it donates its outermost electron to the chlorine atom, forming a sodium ion (Na⁺) and a chloride ion (Cl⁻) by accepting an electron. The strong electrostatic force of attraction between the newly created ions, holds sodium and chloride ions together to create sodium chloride, Na⁺Cl⁻ or NaCl.

Similarly in the case of Magnesium Oxide (MgO) is formed from the chemical interactions of Magnesium and oxygen atoms, leading to the formation of an ionic compound.

Since magnesium has an atomic number of 12, its electrical configuration is 2, 8 and 2, there is just 2 electrons in the outermost shell of a Magnesium atom. Therefore, the magnesium atom gives two electron to produce the Magnesium ion Mg²+ .

Oxygen has an atomic number of 8. Hence, its electronic configuration is 2 and 6, the oxygen atom contains 6 electrons in its outermost shell and requires 2 more electron to create the inert gas’s stable, eight-electron configuration. Consequently, a oxygen atom accepts 2 electronelectrons and creates the negatively charged oxide ion (O²-).

When magnesium interacts with oxygen, it donates its outermost electrons to the oxygen atom, generating a Magnesium ion Mg²+ .  And an oxygen ion (O²⁻) by acquiring 2 electrons. The attractive electrical force holds magnesium and oxygen   ions together to create sodium chloride,        Mg²⁺ O²⁻ or MgO.

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Answer:A single bond is a chemical bond between two atoms in which they share one pair of electrons. This is the simplest type of covalent bond, and it is formed when two atoms need to complete their outer electron shells by sharing a pair of electrons. The sharing of these electrons creates a stable molecule by balancing the electrostatic forces between the positively charged atomic nuclei and the negatively charged electrons. Single bonds can be found in many molecules, such as HCl, H2O, and CH4. They are typically weaker than double or triple bonds, which involve the sharing of two or three pairs of electrons, respectively.

0.25 moles of carbon dioxide has a greater mass which is equal to 11g.

There is a formula that reads,

"Mass = molecular mass × moles"

The molecular mass of carbon dioxide is 44 and remains constant.

Plugging in the equations we get,

Mass = 44 × 0.25

Mass of carbon dioxide = 11g.

Again, for mass of carbon monoxide, we get;

1 mole CO contains 6.022 × \(10^{23}\) molecules of CO.

So, mass of 6.022 × \(10^{23}\) molecules of CO = 28 g.

Therefore, mass of 1.5 × \(10^{23}\) molecules of CO,

 (1.5×\(10^{23}\) ×28) / (6.022×\(10^{23}\)) = 6.97g ≈ 7g

Therefore,  0.25 moles of carbon dioxide has a greater mass.

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The increase in alkalinity indicates that hydroxide ions (OH-) are being formed in the solution. This suggests that the forward reaction, which involves the combination of sodium ions (Na+) and hydroxide ions (OH-) to form sodium hydroxide (NaOH), is favoured at higher temperatures.

At higher temperatures, Na+(aq) +OH-(aq) will occur. This is because the increase in temperature causes the dissociation of water to increase, leading to an increase in the concentration of hydroxide ions (OH-) in the solution. The reaction between Na+ and OH- then occurs, resulting in an increase in alkalinity. There is no indication that the reaction proceeds with either evolution or absorption of heat, and the solubility of acetic acid is not relevant to the observed increase in alkalinity.

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Answer:

First, write an equation for the reaction involved.

Fe + CuSO4 ---> FeSO4 + Cu

Now, calculate the no. of moles added in the reaction. (n.o.m. = mass /molar mass)

No. of moles of Fe added = 2 / 55.8

= 0.0358 mol

No. of moles of CuSO4 = 7 / (63.5 +32.1+16x4)

= 0.04386 mol

From the equation, the mole ratio of Fe : CuSO4 = 1:1,

meaning 1 mole of Fe reacts with 1 mole of CuSO4.

It also indicates that the no. of moles reacted in Fe equals to the no. of moles reacted in CuSO4.

0.04386 > 0.0358

The no. of moles of CuSO4 is higher than that of Fe, meaning all moles of Fe will be reacted while not all CuSO4 reacts.

Hence Fe is the limiting reagent, and CuSO4 is in excess.

All 0.0358 moles of Fe reacts, meaning the no. of moles of CuSO4 left unreacted = 0.04386 - 0.0358

= 0.0080596mol

mass of CuSO4 unreacted = 0.0080596 x (63.5 +32.1+16x4)

= 1.28g

Answer:

0.5474

Explanation:

3.22 x 0.17

     \/

322 x 17 = 5,474

[] There are four places "after" the decimal in 3.22 and 0.17 combined, meaning we move the decimal to the right four times in our current answer

-> 5,474 becomes 0.5474

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Answer:0.55

Explanation:

3.22 × 0.17 calculated with significant figures is 0.55, which has 2 sig figs and 2 decimals. There are 2 steps to calculate 3.22 × 0.17 with sig figs. 0.55 rounded to 1 sig figs is 0.6.

Answer:

The easiest way to separate a mixture of sugar and water is to use distillation, a process that separates substances based on their different boiling points. 《☆☆☆☆☆》

Explanation:

Hope it helps JOIN 《Æ §QŮÅĐ》

The majority of the vials are filled with H2O, which stands for water. Water is a colorless, odorless, and tasteless liquid that is essential for life on Earth.

It is made up of two hydrogen atoms and one oxygen atom, which is why its chemical formula is H2O. Water is commonly found in various forms such as oceans, lakes, rivers, and even in the atmosphere as clouds. It is a universal solvent, which means that it can dissolve many different types of substances, including salts, sugars, acids, and gases. This property makes it a vital component for many industrial and biological processes. The other vials contain hydrogen gas (H2), sodium (Na), mercury (Hg), and methane gas (CH4). Hydrogen gas is the lightest and most abundant element in the universe, while sodium is a soft, silvery-white metal that is highly reactive with water. Mercury is a dense, silvery-white liquid that is commonly used in thermometers, and methane gas is a colorless, odorless gas that is a primary component of natural gas.

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Answer: Mojave grasshopper

Explanation: this is the answer because it is living

The direction in which the reaction will initially proceed depends on the value of the equilibrium constant (K). If you know K, compare it with the calculated reaction quotient (Q = 20) to determine the direction of the reaction.

To determine the direction in which the reaction will proceed, we need to compare the initial reaction quotient (Q) with the equilibrium constant (K).

Step 1: Calculate the initial concentrations of the reactants and products
Since all substances are mixed in a one-liter container, their concentrations are as follows:
[A] = 0.0010 mol/L
[B] = 5.0 mol/L
[C] = 0.10 mol/L

Step 2: Determine the reaction quotient (Q) using the given concentrations
The reaction quotient is calculated using the formula Q = [C]/([A]*[B]). Plug in the concentrations from step 1:
Q = (0.10) / (0.0010 * 5.0) = 0.10 / 0.005 = 20

Step 3: Compare Q with the equilibrium constant (K)
Without the specific equilibrium constant (K) for the reaction, we cannot provide a definitive answer. However, based on the value of Q, we can infer the following:

- If Q < K, the reaction will proceed forward (to the right) to reach equilibrium.
- If Q > K, the reaction will proceed backward (to the left) to reach equilibrium.
- If Q = K, the reaction is already at equilibrium.

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