Calculate the mass, in grams, of 122 atoms of iron, Fe (1 mol of Fe has a mass of 55.85 g).

Answer:

The structure with the ring flipped is the most stable

Explanation:

We have the  trans 1,2 - dimethylcyclohexane. With the wedge/dash structure we could not figure is this form is stable (If we do a comparison with the cis structure). But when we do a chair structure and ring flipped structure, this is easier to look.

The picture attached shows the structures, they are labeled as 1, 2 and 3, according to this problem.

In the chair structure, according to the picture below, you can see that both methyls are heading in the axial positions of the ring (One facing upward and the other downward). This is pretty stable, however, when the methyls are in those positions, the methyl position 1, can undergoes an 1,3 diaxial interactions with the hydrogens atoms (They are not drawn, but still are there), so this interaction makes this structure a little less stable that it can be.

On the other side, the ring flipped structure, we can see that both methyls are in the equatorials positions of the ring, and in these positions, it can avoid the 1,4 diaxial interactions with the hydrogens atoms, making this structure the most stable structure.

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a. The rate law for this reaction is: Rate = k[Cl] [H₂]. This means that the rate of the reaction is directly proportional to the concentrations of both Cl and H₂ molecules.

Rate law is an equation that describes the rate of a chemical reaction as a function of the concentrations of reactants. The rate law allows us to describe how the rate of a reaction changes when the concentrations of reactants are changed. It is derived from the rate equation, which is a mathematical expression that can be used to calculate the rate of a reaction from the concentrations of the reactants and the rate constant.

b. The rate law for this reaction is: Rate = k[O] [Os]. This means that the rate of the reaction is directly proportional to the concentrations of both O and Os molecules.
c. The rate law for this reaction is: Rate = k[NO₂]₂. This means that the rate of the reaction is directly proportional to the square of the concentration of NO₂ molecules.

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Complete Question:

The rate of reaction is

1.17*10^5 J/mol

By Arohenius equation, we have

\(.$$\log \left(k_2 k_1\right)=\frac{E_a}{2 \cdot 303 R}\left(\frac{T_2-T_1}{T_1 T_2}\right)$$Given, $k_1=4.85 \times 10^{-5} \mathrm{~L}$ mol.s$$T_1=195^{\circ} \mathrm{C}=(273+195) \mathrm{K}=468 \mathrm{~K}$$$$\begin{aligned}& k_2=8.80 \times 10^{-3} \frac{\mathrm{L}}{\text { mil.s}} \\& T_2=258^{\circ} \mathrm{C}=(273+258) \mathrm{k}=531 \mathrm{~K}\end{aligned}$$\)

\($$\begin{aligned}& \therefore \log \left(\frac{8.80 \times 10^{-3}}{4.85 \times 10^{-5}}\right)=\frac{E a}{2.303 R}\left(\frac{531.468}{488 \times 531}\right) \\& \Rightarrow \log (181.44)=\frac{E_a}{2.303 R}\left(\frac{63}{248,508}\right) \\& \Rightarrow E_a=\log (181.44) \times \frac{248508}{63} \times 2.303 \times 8.314 \\& =170,595.94 \mathrm{~J} / \mathrm{mal} \text {. } \\& =1.71 \times 10^5 \mathrm{~J} / \mathrm{mol} \text { (aru) } \\&\end{aligned}$$\)

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The connection between increasing carbon dioxide and increasing temperature is: carbon dioxide absorbs heat from the sun and traps it in earth's atmosphere. Since the heat cannot escape, it causes the earth's temperature to increase which is the first option.

When carbon dioxide (CO₂) and other greenhouse gases are present in the atmosphere, they act as a natural blanket, allowing sunlight (solar radiation) to pass through and reach the Earth's surface. Some of this solar radiation is absorbed by the Earth's surface, while the rest is reflected back towards space as heat (infrared radiation). However, greenhouse gases like carbon dioxide have the property of absorbing and re-emitting infrared radiation.

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Answer:

Protons, neutrons, and electrons

Explanation:

Both protons and neutrons have a mass of 1 amu and are found in the nucleus. However, protons have a charge of +1, and neutrons are uncharged. Electrons have a mass of approximately 0 amu, orbit the nucleus, and have a charge of -1.

2 moles of water produces from 2 moles of hydrogen and 1 moles of oxygen. 2 molecules of water produces from 2 molecules of hydrogen and 1 molecules of oxygen. 2 liters of water produces from 2 liters of hydrogen and 1 liter of oxygen

Water is a substance that exists in gaseous, liquid, & solid phases and is made up of chemical components such as hydrogen and oxygen. Of the most prevalent and necessary substances is it. a liquid that is flavourless and odourless at normal temperature.

It has the critical capacity to dissolve a wide variety of other compounds. In fact, living things depend on water's adaptability as a solvent. It is thought that life first appeared in the water-based solutions of the oceans of the earth.

2H\(_2\)(g) + 0\(_2\)(g) → 2H\(_2\)O(g)

2 moles of water produces from 2 moles of hydrogen and 1 moles of oxygen

2 molecules of water produces from 2 molecules of hydrogen and 1 molecules of oxygen

2 liters of water produces from 2 liters of hydrogen and 1 liter of oxygen

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Answer:

F. Bathtub; has higher temperature.

Explanation:

The specific heat depends on each substance, in this case, both the bathtub and the Arctic Ocean have water, so they have the same substance and the same specific heat.

So, the option that has more heat is the bathtub, because it has higher temperature.

A. The mole fraction of isopropanol in the solution is 0.124

B. The mass percent of isopropanol is 12.4%

C. The molality of isopropanol is 7.86 M

Mole fraction = mole / total mole

Mole fraction of isopropanol = 0.470 / 3.79

Mole fraction of isopropanol = 0.124

Percentage = (mole / total mole) × 100

Percentage of isopropanol = (0.470 / 3.79) × 100

Percentage of isopropanol = 12.4%

Molality = mole / Kg of water

Molality of isopropanol = 0.47 / 0.05976

Molality of isopropanol = 7.86 M

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Answer:

Explanation:

When calcium hydroxide is dissolved in water , it ionizes as follows .

Ca( OH)₂ = Ca⁺² + 2 OH ⁻

When it is dissolved in water which contains minimal OH⁻ , so there is almost no common ion effect . Hence calcium hydroxide is fully dissolved in pure water solvent .

When 1.00 mole sample of solid calcium hydroxide is added to 500.0 mL of 0.500 M sodium hydroxide solution in beaker , it is not fully dissolved due to common ion of hydroxide ion ( OH⁻ )

NaOH = Na⁺ + OH⁻

OH⁻ ion from NaOH , suppresses the dissolution of calcium hydroxide .

Similarly

When A 1.00 mole sample of solid calcium hydroxide is added to 500.0 mL of 0.200 M sodium hydroxide solution in beaker , it is not fully dissolved due to common ion of hydroxide ion ( OH⁻ )  

NaOH = Na⁺ + OH⁻

OH⁻ ion from NaOH , suppresses the dissolution of calcium hydroxide

When 1.00 mole sample of solid calcium hydroxide is added to 500.0 mL of 0.200 M calcium nitrate solution , it is not fully dissolved due to common ion of calcium  ion ( Ca⁺² )

Ca( NO₃)₂ = Ca⁺² + 2NO₃⁻

Ca⁺²  ion from Ca( NO₃)₂ , suppresses the dissolution of calcium hydroxide .

Answer:

Required heat = 15,716.8 joules

Explanation:

Given:

Mass of ice = 47 grams

Find:

Required heat

Computation:

Required heat = Mass x latent heat of ice

Required heat = 47 x 80 caloric per gram degree

1 calories = 4.18 (Approx)

Required heat = 47 x 80 x 4.18 joules

Required heat = 15,716.8 joules

Answer:

To determine the change in mass of A over the given time period, we need to find the difference between the initial mass of A and the final mass of A.

From the given table, we can see that the initial mass of A at t = 0 (start time) is 12.4 g and the final mass of A at t = 60 minutes (end time) is 6.2 g.

Therefore, the change in mass of A over 60 minutes is:

Final mass of A - Initial mass of A

= 6.2 g - 12.4 g

= -6.2 g

The negative sign indicates that the mass of A decreased over time, which means that A underwent some kind of reaction or process that caused it to lose mass.

The change in mass of A over 60 minutes is -6.2 grams.

To determine the change in mass of A over 60 minutes, we need to compare the initial mass to the final mass.

From the given information, we can see that the mass of A decreases over time.

Let's calculate the change in mass.

Initial Mass of A: 12.4 g

Final Mass of A: 6.2 g

Change in Mass of A = Final Mass of A - Initial Mass of A

= 6.2 g - 12.4 g

= -6.2 g

The change in mass of A over 60 minutes is -6.2 grams.

Note that the negative sign indicates a decrease in mass.

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Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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Answer:

Sodium Carbonate

Explanation:

Sodium carbonate is made of three elements, that are, sodium, carbon and oxygen.

Its formula is Na2CO3.

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The red line showing the IR spectrum emitted from the earth's surface does not match the blue line showing the expected IR spectrum from a 300˚C object because:

IR spectroscopy studies Infrared (IR) light in the electromagnetic spectrum.

Sensors are used by thermal detection systems, also known as infrared detection systems, to detect radiation in the infrared region of the electromagnetic spectrum.

In order to create an electronic signal, an infrared camera must first detect the thermal energy or heat, that the scene being seen emits. After processing this signal, an image is created.

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It is the 4th scenario is the dependent event. There are 7 gold tokens and 4 silver tokens in a cup. The first student randomly draws a gold token and keeps it. A second student randomly draws a gold token from the cup.

The fouth scenario is a dependent event because the probability of the second student drawing a gold token is affected by the outcome of the first student's draw.

If the first student draws a gold token, then there are only 6 gold tokens left in the cup, the probability changes. but  if the first student does not draw a gold token, then there are 7 gold tokens left in the cup, the probability will remain the same

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Answer: B

Explanation:

The rate law is the mathematical equation that describes how reactant concentration changes as a function of time. A law such as "Rate = k*[A]*[B]" means that, for each liter-equivalent of the reactant(s) A, there are k liters of reactant B. The law also dictates the molarity (and thus partial pressure) for each component in solution.

Answer:

Their number

Explanation:

Freezing is the process of decreasing the activity of the molecules in the medium and their arrangement will change to take on the new shape but no new molecules are added or taken away

a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. The volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. According to the balanced chemical equation, for every 2 moles of water (H2O) electrolyzed, 1 mole of oxygen gas (O2) is obtained. Since 1 mole of any gas occupies 22.4 L at standard temperature and pressure (STP), we can use the stoichiometry of the reaction to determine the volume of oxygen gas produced.

Given that 50 cm³ of gas is obtained at the anode, we need to convert this volume to liters:

50 cm³ = 50/1000 L = 0.05 L

Using the stoichiometric ratio of the balanced equation, we find that 2 moles of water produce 1 mole of oxygen gas. Therefore, 0.05 L of oxygen gas is equivalent to:

0.05 L × (1 mole/22.4 L) = 0.002232 moles

Thus, the volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

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Answer:

B

Explanation:

Answer:

d = 1.91 g/cm³

d = 1.91 g/mL

Explanation:

Given data:

Mass of cheese = 67 g

Volume of cheese = 35 cm³

Density of cheese = ?

Solution:

Formula:

d = m/v

by putting values,

d = 67 g/ 35 cm³

d = 1.91 g/cm³

1cm³ = 1mL

d = 1.91 g/mL

Answer:

The first one

Explanation:

Answer:

Liquid X is neutral and Liquid Y is a base

Explanation:

Acid: pH<7

Neutral: pH=7

Base: pH>7

The final temperature of the water is: T_final = 45.0°C

We can use the formula for the specific heat capacity of the water to solve this problem:

q = mcΔT

First, we can calculate the initial energy of the water:

q = mcΔT

q = (10.0 g) (4.184 J/g°C) (25.0°C)

q = 1,046 J

Next, we can calculate the final temperature after absorbing 840 J:

q = mcΔT

840 J = (10.0 g) (4.184 J/g°C) (ΔT)

ΔT = 20.0°C

Therefore, the final temperature of the water is:

T_final = T_initial + ΔT

T_final = 25.0°C + 20.0°C

T_final = 45.0°C

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Lead fluoride hope this helps

Answer:

The strong forces oppose the electromagnetic force of repulsion between protons. Like ”glue” the strong force keeps the protons together to form the nucleus. The strong forces and electromagnetic forces both hold the atom together.

Explanation:

Hope This helps

Answer:

The strong forces oppose the electromagnetic force of repulsion between protons.

Answer:

There are  5.0  moles hydroxide ions in  2.5  moles magnesium hydroxide.

Explanation:

The chemical formula  Mg(OH)2, indicates that there are two moles of hydroxide ions in each mole of the compound.

To determine the number of hydroxide ions in  2.5 mol Mg(OH)

2, multiply the moles of the compound by

\(2.5mol Mg(OH){2} X\frac{2 mol OH^{-} }{1mol Mg(OH){2} } = 5.0 mol OH^{-}\)

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make it the brainlist answer please

Answer:

Cu2 + 4 NH3 = Cu (NH3) 42+

so - - >

[Cu (NH3) 6] ^ 2+

Explanation:

Answer:

Option C. 88 KJ

Explanation:

The activation energy (Ea) is the minimum energy that reactant must overcome in order for them to proceed to product.

In an energy profile diagram, the activation energy (Ea) is obtained by calculating the difference between the energy of the activation complex (i.e peak) and the energy of the reactant.

With the above information, we shall determine the activation energy (Ea) of the reaction above as follow:

Activation complex = 268.74 KJ

Energy of reactant = 180.74 KJ

Activation energy (Ea) =?

Activation energy = Activation complex – Energy of reactant

Activation energy = 268.74 – 180.74

Activation energy = 88 KJ

Therefore, the activation energy (Ea) of the reaction is 88 KJ

Answer:

88.00 kJ

Explanation:

Answer:

There are no units with electro negativity. Linus Pauling designed a scale of electro negativity that ranks elements with respect to each other. So, for example, fluorine is a 4.0 in comparison to 0.7 for francium.

Explanation: