How many grams of nickel must be added to 500 grams of copper to produce an alloy that contains 50 wt% a at 1300 °C? [See Figure 10-8(a).]

The slope of the graphical method can be used to obtain the activation energy.

As we know that rate constant (K) and the activation energy (Ea) relate to each other as;

   lnK = ln A - Ea / RT

By using the values from the slope between 1/T and K, the activation energy of any reaction can be calculated

Hence

   Slope = -Ea / R

Ea is the activation energy, the minus sign indicates that energy will b absorbed by the system

R is the rate constant, and the value of R is 8.314 J/mol.K

So it is clear that we can get the activation energy by using the slope of the graphical data.

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The gravitational acceleration at an altitude equal to the planet's diameter is approximately 2.1222 m/s

The gravitational acceleration at a certain altitude can be calculated using the equation for gravitational acceleration. The formula is given as:

g' = \(g * (R / (R + h))^2\)

Where:

g' is the gravitational acceleration at the altitude,

g is the gravitational acceleration at the surface (given as 19.1 m/s²),

R is the radius of the planet, and

h is the altitude.

In this case, since we want to find the gravitational acceleration at an altitude equal to the planet's diameter, the altitude (h) will be equal to twice the radius of the planet (R).

Let's assume the radius of the planet is denoted as R. Therefore, the altitude (h) will be 2R.

Substituting these values into the formula:

g' = \(19.1 * (R / (R + 2R))^2\)

   =\(19.1 * (R / 3R)^2\)

 \(= 19.1 * (1/3)^2\)

   = 19.1 * (1/9)

   = 2.1222 m/s²

Therefore, the gravitational acceleration at an altitude equal to the planet's diameter is approximately 2.1222 m/s².

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chemical properties and same number of shell

Explanation:

elements in the same group have the same number of eletrons in their outermost shell and hence have the same chemical properties

Answer:

2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O

190.14 mL of the NaOH solution would be required.

Explanation:

The balanced reaction is:

Now we calculate how many H₂SO₄ moles are there in 25.00 mL of a 5.400 M solution, using the definition of molarity:

Now we convert H₂SO₄ moles into NaOH moles, using the stoichiometric coefficients of the balanced reaction:

Finally we calculate the volume of a 1.420 M solution that would contain 270 mmoles:

ionic compounds are electrically neutral overall. therefore, the sum of the charges on the cation and anion in each formula unit must be equal to zero

Ions are charged particles that form when an atom (or group of atoms) receives or loses an electron, and ionic compounds are composed of these charged particles. An anion is a negatively charged ion, whereas a cation is a positively charged ion.

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If excess ammonium sulfate reacts with 20.0g of calcium hydroxide then liters of ammonia are produced at STP 0.081L

Ammonium sulphate is the organic solvent and the primary use of ammonium sulphate is as a fertilizer for alkaline soils

Here given reaction is

(NH₄)₂SO₄ + Ca(OH)₂ → CaSO₄ + NH₃ + H₂O

Here given data is

Calcium hydroxide  = 20.0g

We have to find liters of ammonia are produced at STP =?

20.0g of (NH₄)₂SO₄ STP = ?

Then 20.0g of (NH₄)₂SO₄×1 mol/132g×0.54L/1 mol = 0.081L

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Answer:

Q.1

Given=

V1=6.5ltr

P1=191.0kPa

T1= 750.pK

P2= 101.3kpa

T2= 298K

V2=?

Combined gas law: P1V1/T1 = P2V2/T2

 Use the gas laws for pressure, volume and temperature calculations

Now,

191.0×6.5/750= 101.3×V2/298

V2 = 191.0×6.5×298/750×101.3

On solving further

V2 = 4.86 ltr!

4.86 volume with the steam occupy in the atmosphere!

Q.2

Scientific Reasoning:-

Temperature is directly to proportional to the pressure in second scenario the temperature was reduced to nearly half of the first one hence the pressure also decreased simultaneously, and we all know according to charles law The volume of a given gas sample is directly proportional to its absolute temperature so the decreasing temperature affected the amount of volume that decreased!

Answer:

Carbs can be broken down into glucose, the first molecule used during glycolysis. Similarly, proteins can be broken down into their basic parts to form acetyl CoA, the molecule that enters the citric acid cycle.

They will not have to pay any cost because the accident was not Dave’s fault, Eli will be covered by Dave’s family car insurance policy, they will be protected by the other driver’s insurance. (B,C,D)

Explanation: just answered it and it was correct.

B. They will not have to pay any costs because the accident was not Dave’s fault.

C. Eli will be covered by Dave’s family car insurance policy.

D. They will be protected by the other driver’s insurance.

May I have brainliest please? :)

\(\huge\bold\red{Answer:-}\)

It’s the same as when magnesium reacts with liquid water, only faster:

Mg + 2H₂O → MgO + H₂.

The difference is that in water, the reaction has a second step, converting MgO to Mg(OH)₂.

Answer:

either deposition or physical weathering

Answer:

D. Erosion

Explanation:

The new pH of the solution after the addition of 250 mM of KOH is approximately 11.6.

To solve this problem, we need to use the equation that relates the pH of a solution to the dissociation constant (pKa) of a weak acid and the ratio of the concentrations of the weak acid and its conjugate base. We can use this equation to calculate the initial concentration of the weak acid and its conjugate base, then use the stoichiometry of the reaction between the weak acid and the strong base to calculate the concentrations of the weak acid and its conjugate base after the addition of KOH. Finally, we can use the same equation to calculate the new pH.

The equation we need to use is:

pH = pKa + log([A-]/[HA])

where [A-] is the concentration of the conjugate base and [HA] is the concentration of the weak acid.

First, we can use the initial pH of 7.3 to calculate the initial concentration of the weak acid using the following equation:

pH = -log[H+]

[H+] = 10^(-pH) = 10^(-7.3) = 5.01 x 10^(-8) M

Since the initial pH is equal to the pKa of the weak acid, we know that half of the weak acid has dissociated into its conjugate base, so the initial concentration of the weak acid is equal to the initial concentration of the conjugate base:

[HA] = [A-] = 5.01 x 10^(-8) / 2 = 2.505 x 10^(-8) M

When we add 250 mM of KOH to the solution, it will react with the weak acid to form its conjugate base and water:

HA + OH- → A- + H2O

The stoichiometry of the reaction tells us that the concentration of the weak acid will decrease by the same amount that the concentration of the conjugate base increases. If we assume that the total volume of the solution is 100 mL, then the final volume of the solution will be 350 mL, and the concentration of KOH will be:

[OH-] = 250 mM / 350 mL = 0.714 M

At the end of the reaction, the concentration of the conjugate base will be:

[A-] = [HA]initial + [OH-] = 2.505 x 10^(-8) M + 0.714 M = 0.714 M

The concentration of the weak acid will be:

[HA] = [OH-] = 0.714 M

Now we can use the same equation as before to calculate the new pH:

pH = pKa + log([A-]/[HA]) = 7.3 + log(0.714/2.505x10^-8) ≈ 11.6

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Answer:

Micro, milli, deci, deca, mega

Explanation:

the suffix each denote the amount in comparison to a liter

Answer:

jellyfish

Explanation:

Answer: i would say jellyfish

Explanation:

just because this guy said so

Answer:

b i took the test:)

Explanation:

The correct answer is c. sarcoplasmic reticulum. Ca2+ ions, which are essential for muscle contraction, are stored in the sarcoplasmic reticulum (SR) of muscle cells.

The sarcoplasmic reticulum is a specialized network of membranous sacs within muscle fibers, specifically designed for the storage and release of calcium ions during muscle contraction.

When a muscle is stimulated, an action potential triggers the release of stored Ca2+ ions from the sarcoplasmic reticulum into the sarcoplasm, the cytoplasm of muscle cells. The influx of Ca2+ ions into the sarcoplasm initiates a series of events leading to muscle contraction.

The sarcoplasm refers to the cytoplasm of muscle cells, the sarcolemma is the plasma membrane of muscle cells, and T-tubules are invaginations of the sarcolemma that help transmit the action potential deep into the muscle fiber.

Therefore, the correct location where Ca2+ ions are stored for muscle contraction is the sarcoplasmic reticulum (c).

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Answer:

There are 2 answers.  A and C

Explanation:

Si is Silicon, which is a metalloid,

Br2 is Bromine, which is a metalloid

Answer:

Explanation: 15 grams trust me.!!

1. The balanced equation for the reaction is:

Cu + I₂ -> CuI₂

2. The percentage yield of the reaction is 68%

1. The balanced equation for the reaction between copper and iodine to produce copper(II) iodide is:

Cu + I₂ -> CuI₂

2. How do I determine the percentage yield?

First, we shall obtain the theoretical yield. This can be obataned as follow:

Cu + I₂ -> CuI₂

From the balanced equation above,

253.8 g of I₂ reacted to produce 317.35 g of CuI₂

Therefore,

57.8 g of I₂ will react to produce = (57.8 × 317.35) / 253.8 = 72.3 g of CuI₂

Now, we shall determine the percentage yield of the reaction. Details below

Percentage yield = (Actual /Theoretical) × 100

Percentage yield of reaction = (49.2 / 72.3) × 100

Percentage yield of reaction = 68%

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Answer:

A is the load.

Explanation:

A is the load.

B is the resistance arm.

C is the fulcrum.

D is the effort arm.

E is the effort.

I hope this helps!

Answer:

below

Explanation:

First it warms up until it reaches the boiling point temperature ....add more energy and it will begin to boil ...continue adding energy and it will begin to vaporize into steam

Answer:

It evaporates the liquid water.

Explanation:

This energy exists in the form of heat. Evaporation happens when a liquid is heated. For example, as the sun heats water in a puddle, the puddle slowly shrinks. The water seems to disappear, but it moves into the air as a gas called water vapor.

Answer:

it will expand.

Explanation:

The expansion of water when you cool it to lower temperatures is unusual, since most liquids contract when they're cooled.

To determine which compounds are not true organometallic compounds in the eyes of purists, we need to consider the definition of organometallic compounds.

Organometallic compounds are compounds that contain a direct bond between a carbon atom and a metal atom. Based on this definition, we can evaluate each compound provided:

Compound 1: This compound contains a direct bond between a carbon atom and a metal atom (M), so it is a true organometallic compound.

Compound 2: This compound contains a direct bond between a carbon atom and a metal atom (M), so it is a true organometallic compound.

Compound 3: This compound does not contain a direct bond between a carbon atom and a metal atom. Instead, it has a metal atom (M) coordinated to a ligand (L) without a direct carbon-metal bond. Therefore, it is not considered a true organometallic compound in the eyes of purists.

Compound 4: This compound contains a direct bond between a carbon atom and a metal atom (M), so it is a true organometallic compound.

Compound 5: This compound does not contain a direct bond between a carbon atom and a metal atom. It has a metal atom (M) coordinated to a ligand (L) without a direct carbon-metal bond. Therefore, it is not considered a true organometallic compound in the eyes of purists.

Based on the above analysis, the correct answer is:

D. Compound 3 only

Compound 3 is not considered a true organometallic compound since it lacks a direct carbon-metal bond.

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Answer:

Explanation:

Vale, y entonces que ahora???

Answer:

3 atoms

Explanation:

There is 1 atom in Ca and 2 atoms in F (from F2) giving a total of 3 atoms

The nutrient that is present in the highest amounts in most foods is carbohydrates. Carbohydrates provide the body with energy and are found in a wide variety of foods, including fruits, vegetables, grains, and dairy products.

Carbohydrates are one of the three macronutrients that are essential to human health, along with protein and fat. They are composed of sugars, starches, and fibers and are broken down into glucose, which the body uses as its primary source of energy.

Carbohydrates are found in a wide range of foods, from simple sugars found in fruits and honey to complex carbohydrates found in grains and vegetables.

Carbohydrates are especially abundant in foods such as bread, pasta, rice, and potatoes, which are staples in many diets around the world. Dairy products, such as milk and yogurt, also contain carbohydrates in the form of lactose.

Fruits and vegetables are also good sources of carbohydrates, as they contain natural sugars and fibers that help to regulate blood sugar levels and support digestive health.

While carbohydrates are an important source of energy, it is important to consume them in moderation and to choose complex carbohydrates over simple sugars whenever possible.

This can help to prevent spikes in blood sugar levels and support overall health and wellbeing.

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Answer:

false, The nucleus of atoms still move around like crazy, it's just the electrons move more.