Given:

8CO + 17H2 → C8H18 + 8H2O

In this chemical reaction, how many grams of H2 will react completely with 6.50 moles of CO? Express your answer to three significant figures.

grams of H2 will react completely.

Answer:

B.) The sun is closer to Earth than any other star.

Answer:  Charles' Law

Explanation:  At constant pressure, Charles's law states that the volume of a given amount of gas is directly proportional to its temperature on the kelvin scale.  [0 Kelvin = 0 Liters gas]

Explanation:

. Charles’s law—named for J.-A.-C. Charles (1746–1823)—states that, at constant pressure, the volume V of a gas is directly proportional to its absolute (Kelvin) temperature T, or V/T = k. 

One possible synthesis of 2-hexanone from compounds containing four carbons or fewer could start with the compound ethylacetoacetate (EAA), which has three carbons.

EAA can be reacted with ethyl iodide in the presence of a strong base, such as sodium hydride, to yield the compound ethyl 3-oxobutanoate. This compound has four carbons and can be further reacted with a Grignard reagent, such as methylmagnesium bromide, to form the intermediate compound 3-hexanol. This compound can then be oxidized with a strong oxidizing agent, such as potassium permanganate, to form 2-hexanone, which has six carbons. The final product can be purified using distillation or other separation techniques. This synthesis involves multiple steps and requires careful handling of reactive chemicals, but can yield high purity 2-hexanone from simple starting materials.
To synthesize 2-hexanone from compounds containing four carbons or fewer, we can use a three-step process. First, perform a Grignard reaction between ethyl magnesium bromide (CH3CH2MgBr) and butanone (CH3CH2COCH3) to form a tertiary alcohol. Next, conduct an oxidation of the tertiary alcohol using a strong oxidizing agent such as chromium trioxide (CrO3) to create a ketone, 2-hexanone (CH3CH2CH2COCH2CH3). This method efficiently combines smaller carbon compounds to produce the desired target molecule, 2-hexanone, with the given restrictions on starting materials.

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5.83ml of NaOH is needed to prepare 175 ml of 0.20 m by dilution.

Dilution is the process of “lowering the concentration of a solute in a solution by simply adding more solvent to the solution, such as water.” Diluting a solution enables adding more solvent without adding more solute.

into formula to find out the volume is ;

\(V_{1}\)\(N_{1}\) = \(V_{2}N_{2}\)

where \(V_{1}\)= ?

\(V_{2}\) = 175ml

\(N_{1}\) = 6

\(N_{2}\) = 0.2

So, ⇒ \(V_{1}\)×6 = 175×0.2

\(V_{1}\) = 5.83 ml

So, 5.83ml of NaOH is needed to prepare 175 ml of 0.20 m by dilution.

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Now

Ideal gas equation

\(\\ \rm\Rrightarrow PV=nRT\)

\(\\ \rm\Rrightarrow 112=n(8.314)(398)\)

\(\\ \rm\Rrightarrow n=0.033mol\)

Answer:

\(0.03384\ mol\)

Explanation:

Step 1:  Determine important information

Ideal gas law → \(PV=nRT\)

At the end of the problem statement we can see that the pressure is \(1.0\ atm\).  V is the volume which is given as \(112\ L\).  n is the amount of substance which is what we are trying to find.  R is the ideal gas constant is the same for every problem which is \(8.3145\ J * mol^{-1}*K^{-1}\).  Finally, T is the temperature which is given as \(125\ C\) but we have to convert to kelvins which we get \(398\ K\).

Step 2:  Plug in the information and solve

\(PV=nRT\)

\((1.0\ atm)*(112\ L) = n*(8.3145\ J * mol^{-1}*K^{-1})*(398\ K)\)

\(112=n*(3,309.171)\)

\(\frac{112}{(3,309.171)}=\frac{n*(3,309.171)}{(3,309.171)}\)

\(0.03385\ mol = n\)

Answer: \(0.03384\ mol\)

The equation of state for a hypothetical ideal gas is known as the ideal gas law, sometimes known as the general gas equation. i.e. PV = nRT or P1V1 = P2V2.

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Answer:

Mechanical energy is energy that results from movement or the location of an object. Mechanical energy is the sum of kinetic energy and potential energy.

Explanation:

Nuclear energy is energy resulting from changes in the atomic nuclei or from nuclear reactions.

Example: Nuclear fission, nuclear fusion, and nuclear decay are examples of nuclear energy. An atomic detonation or power from a nuclear plant are specific examples of this type of energy.

Answer:

286.15 Kelvin

Explanation:

Answer:

286.15

Explanation:

Hope this helps, if its correct could you mark me as brainliest please?

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

mass of metal = 300 g

density = 7.13 g/mL

We have

\(volume = \frac{300}{7.13} \\ = 42.07573632...\)

We have the final answer as

Hope this helps you

In the balanced equation for the reaction\(MnO_{4}^-(aq) + Fe_{2} ^+(aq) -- > Mn_{2}^+(aq) + Fe_{3}^+(aq)\) in basic aqueous solution, the coefficient for OH−(aq) is 4.

To balance the given equation in basic aqueous solution, we need to ensure that the number of atoms of each element is equal on both sides of the equation and that the overall charge is balanced. Here's how the equation is balanced:

First, we balance the atoms other than hydrogen and oxygen. The equation becomes:

\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)\)

Next, we balance the oxygen atoms by adding water molecules (H2O):

\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)+4H_{2}O(l)\)

Now, we balance the hydrogen atoms by adding OH−(aq) ions:

\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)+4H_{2}O(l)+4OH^-(aq)\)

Therefore, in the balanced equation, the coefficient for OH−(aq) is 4. This balances the hydrogen atoms and ensures that the equation is balanced in basic aqueous solution.

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Fluorine (F) has seven electrons in its outermost shell. This shell is referred to as the valence shell.

Fluorine is the element with the atomic number 9, which means it has nine protons in its nucleus. It has the electron configuration of 1s22s22p5, with two electrons in the first energy level, two electrons in the second energy level, and five electrons in the third energy level.

                                     The outermost electrons in the third energy level, that is, 2s2p5, are referred to as valence electrons. They participate in chemical bonding and determine the chemical properties of the element.

                                Fluorine requires one more electron to complete its octet, which is a stable configuration of eight valence electrons. This is why it is highly reactive and tends to gain an electron from other elements to form the fluoride ion (F-) in chemical reactions.

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Answer:

FeF3 is a molecule. In it there are 3 atoms of F and one of Fe.

AgI will form in addition to the existing AgCl.

The addition of ammonium chloride solution to the silver-containing solution results in the formation of AgCl due to the reaction between silver ions and chloride ions. The reaction is given as follows:

Ag⁺ + Cl⁻ → AgCl

Next, the addition of potassium iodide solution to the same solution results in the formation of AgI due to the reaction between silver ions and iodide ions. The reaction is given as follows:

Ag⁺ + I⁻ → AgI

Since both reactions involve the same reactant (Ag⁺), the formation of AgI will occur simultaneously with the dissolution of AgCl. However, the extent of the dissolution of AgCl will depend on the solubility product of AgCl and the concentration of Ag⁺ ions in solution.

If the concentration of Ag⁺ ions in solution is high enough to exceed the solubility product of AgCl, then AgCl will dissolve completely to form Ag⁺ ions and Cl⁻ ions. In this case, the formation of AgI will occur in addition to the existing Ag⁺ ions in solution.

If the concentration of Ag⁺ ions is not high enough to exceed the solubility product of AgCl, then the formation of AgI will accompany the dissolution of AgCl until the concentration of Ag⁺ ions is high enough to exceed the solubility product of AgCl.

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The balanced net ionic equation for the setup with a Zn electrode in a 1.0 M aqueous  Zn²⁺ solution on the left side and an Ag electrode in a 1.0 M aqueous Ag⁺ solution on the right side with a salt bridge added can be represented as follows: Zn(s) + 2Ag⁺(aq) → Zn²⁺(aq) + 2Ag(s)

In this setup, zinc metal (Zn) is oxidized and loses electrons at the anode to form zinc ions (Zn²⁺), while silver ions (Ag⁺) from the silver salt solution (AgNO₃) gain electrons at the cathode to form silver metal (Ag). The salt bridge is necessary to maintain electrical neutrality in both half-cells by allowing the transfer of anions and cations between them.

The balanced net ionic equation above represents only the species involved in the redox reaction, with the spectator ions (NO₃⁻ and Cl⁻) omitted. It also indicates the physical states of the reactants and products, with (s) representing solid, (aq) representing aqueous, and (l) representing liquid.

In summary, the balanced net ionic equation for the setup described is Zn(s) + 2Ag⁺(aq) → Zn²⁺(aq) + 2Ag(s), where zinc metal is oxidized at the anode and silver ions are reduced at the cathode, with a salt bridge facilitating the transfer of ions between the two half-cells.

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Through the process of hydrolysis, K-feldspar combines with slightly acidic water and converts into clay minerals (option A).

Hydrolysis is a chemical reaction that breaks down a compound by reacting it with water. In the case of K-feldspar, the water molecules react with the potassium ions in the feldspar, causing them to be released. The potassium ions then react with other water molecules to form potassium hydroxide, a strong base. The remaining aluminum and silicon atoms in the feldspar react with each other to form clay minerals.

Clay minerals are a group of minerals that are formed by the weathering of rocks. They are typically composed of aluminum, silicon, oxygen, and water. Clay minerals have a variety of properties that make them useful in a variety of applications, including ceramics, paints, and pharmaceuticals.

Thus, through the process of hydrolysis, K-feldspar combines with slightly acidic water and converts into clay minerals (option A).

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The temperature at which 0.0828 moles of hydrogen would have a pressure of 1.00 atm and a volume of 55.0 L is 743 K .

The ideal gas law is a fundamental equation of state for an ideal gas.

We can use the Ideal Gas Law to solve for the temperature:

PV = nRT

Where

First, we need to convert the number of moles to moles:

n = 0.0828 mol

Next, we can substitute the given values into the Ideal Gas Law and solve for T:

T = PV/nR = (1.00 atm) x (55.0 L) / (0.0828 mol x 0.0821 L·atm/mol·K) = 743 K

Therefore, the temperature at which 0.0828 moles of hydrogen would have a pressure of 1.00 atm and a volume of 55.0 L is 743 K.

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Answer:

Nitrogen and oxygen are the most common elements in the atmosphere. They make up almost 99% of the atmosphere by mass. Argon makes up most of the rest of the atmosphere.

To solve this problem, we need to use the pH formula:

pH = -log[H+]

where [H+] represents the concentration of hydrogen ions in moles per liter (M).

To find [H+], we can rearrange the formula:

[H+] = 10^(-pH)

Substituting pH = 3.69, we get:

[H+] = 10^(-3.69) = 2.21 × 10^(-4) M

Since hydrochloric acid is a strong acid, it completely dissociates in water to give hydrogen ions and chloride ions:

HCl(aq) → H+(aq) + Cl-(aq)

Therefore, the concentration of hydrochloric acid required to give a solution with a pH of 3.69 is also 2.21 × 10^(-4) M.

The cathodic protection of Cu(s) can be provided if it is connected galvanically to Zn.

The metal with the more reduction potential will act as the anode and undergo oxidation, while the metal with the more positive standard reduction potential will act as the cathode and undergo reduction.

As Cu has a greater reduction potential than Zn, it has a greater capacity to reduce than that of Zn. So by galvanically connecting to zn, we can say that the cathodic protection of Cu can be obtained.

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Answer:

Newton's laws are very important because they tie into almost everything we see in everyday life. These laws tell us exactly how things move or sit still, like why you don't float out of bed or fall through the floor of your house.

Explanation: Newton's laws of motion are important because they are the foundation of classical mechanics, one of the main branches of physics. Mechanics is the study of how objects move or do not move when forces act upon them.

The statement that explains what must be done the observe the chemical property of a substance is as follows: Change it into a different substance (option A)

The chemical property of a substance is any of a material's properties that only becomes evident during a chemical reaction.

Chemical reaction is a reaction that typically involves the breaking or making of interatomic bonds, in which one or more substances are changed into others.

This suggests that chemical properties cannot be observed via change of state or phase but can only be observed when the substance changes into a different substance i.e. undergo a chemical reaction.

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The percent yield is calculated as the ratio of the actual yield to the theoretical yield, multiplied by 100%.

Given values:

Theoretical yield = 75.0 g

Actual yield = 42.0 g

Percent yield = ?

The formula for calculating the percent yield is given by:

% yield = (Actual yield / Theoretical yield) × 100%

Substituting the given values in the above equation, we get:

% yield = (42.0 g / 75.0 g) × 100%

On solving the above equation we get,% yield = 56%

Therefore, the percent yield of the reaction is 56%.

The percentage yield of a reaction is the ratio of the actual yield to the theoretical yield, multiplied by 100%. In the given problem, the percent yield is calculated to be 56%.

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To determine the number of atoms in a sample of bismuth (Bi), we need to use Avogadro's number, which is the number of atoms in one mole of a substance. Avogadro's number is approximately 6.022 x 10^23 atoms per mole.

First, we need to determine how many moles of bismuth are in the 15.5g sample. We can do this by dividing the mass of the sample by the molar mass of bismuth, which is approximately 208.98 g/mol.

moles of Bi = 15.5 g / 208.98 g/mol = 0.0742 mol

Next, we can use Avogadro's number to determine the number of atoms in the sample. We can do this by multiplying the number of moles by Avogadro's number.

number of atoms = 0.0742 mol x 6.022 x 10^23 atoms/mol = 4.46 x 10^22 atoms

Therefore, there are approximately 4.46 x 10^22 atoms in a 15.5g sample of bismuth (Bi).

~~~Harsha~~~

Answer:

m = 65.637 g

Explanation:

Heat = 0.612 kJ = 612 J ( Converting to J by multiplying by 1000)

Initial Temperature =  30.°C

Final Temperature = 51°C

Temperature change = Final Temperature - Initial Temperature = 51 - 30 = 21°C

Mass = ?

The relationship between these quantities is given by the equation;

H = mCΔT

where c = 0.444 J/g°C

Inserting the values in the equation;

612 = m *  0.444 * 21

m = 612 / (0.444 * 21)

m = 65.637 g

Answer:C I think it is C

Explanation:

A LOAEL is defined as the lowest dose that demonstrates a significant increase in an observable adverse effect. The term LOAEL stands for "Lowest Observed Adverse Effect Level."

When testing chemicals and other substances for toxicity, the goal is to determine the concentration or dose at which adverse effects begin to appear. The LOAEL is the lowest dose at which an adverse effect is observed. This value can be used to establish a safe level of exposure to a substance.
To determine the LOAEL, a series of tests are conducted in which different doses of the substance being tested are administered to test animals. The animals are observed for any adverse effects, such as changes in behavior, weight loss, or organ damage. The lowest dose at which an adverse effect is observed is the LOAEL.
It is important to note that the LOAEL is a relative measure of toxicity. It only provides information on the dose at which an adverse effect is first observed and not on the severity of the effect. In addition, the LOAEL may vary depending on the species tested and other factors.
In summary, the LOAEL is the lowest dose at which an observable adverse effect is detected. This value is used to establish a safe level of exposure to a substance.

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Answer:

76.1g

Explanation:

The balanced equation for this reaction is as follows:

3NaOH + AlCl3 --> Al(OH)3 + 3NaCI

From the above equation, it can be observed that 1 mole of AlCl3 is needed to produce 3 moles of NaCl.

Using the formula below, we convert the mass of NaCl to moles;

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

mole = 100/58.5

mole = 1.71mol of NaCl

Since 1 mole of AlCl3 is needed to produce 3 moles of NaCl.

Then 1.71 moles of NaCl will be produced by 1.71/3 = 0.57mol of AlCl3

Molar mass of AlCl3 = 27 + 35.5(3)

= 27 + 106.5

= 133.5g/mol

Mole = mass/molar mass

Mass = molar mass × mole

Mass = 133.5 × 0.57

Mass = 76.1g