Fe304 has a molecular mass of 231.5 g/mol. What is the mass percentage of Fe (55.8 g/mol) in
FezO4?

Answer:

190

Explanation:

Gold has atomic number of 79, which is the number of protons.

Mass number = #protons + #neutrons = 79 + 111 = 190

To deploy configuration profiles for computers from Jamf Pro, the Apple Push Notification service (APNs) must be available.

APNs is a cloud-based service provided by Apple that enables the secure transfer of data between Apple devices and servers. It is essential for communication between Jamf Pro and Apple devices during the deployment of configuration profiles.

APNs is used to initiate the connection between the devices and Jamf Pro, allowing for the transfer of the configuration profiles. Without APNs, it would be impossible to deploy configuration profiles to Apple devices using Jamf Pro.

Therefore, it is critical to ensure that APNs is available and functioning correctly before attempting to deploy configuration profiles using Jamf Pro.

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The mass of zinc that reacted is 0.480 g.

To determine the mass of zinc that reacted, we need to use the ideal gas law to calculate the number of moles of hydrogen gas produced in the reaction. We can then use the stoichiometry of the balanced chemical equation to find the number of moles of zinc that reacted, and convert that to grams using the molar mass of zinc.

The balanced chemical equation for the reaction of zinc with hydrochloric acid is:

Zn(s) + 2HCl(aq) → \(ZnCl_2(aq) + H_2(g)\)

From the equation, we can see that one mole of zinc reacts with two moles of hydrochloric acid to produce one mole of hydrogen gas.

First, we need to calculate the number of moles of hydrogen gas that was produced. We can use the ideal gas law to do this:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

We need to convert the pressure and volume to units that are consistent with the gas constant R, which has units of L·atm/mol·K. The given pressure of 411 Torr is equivalent to 0.541 atm, and the volume of the container is 660 mL, or 0.66 L. The temperature is given as 25.0°C, or 298.2 K.

Plugging in the values, we get:

(0.541 atm) (0.66 L) = n (0.0821 L·atm/mol·K) (298.2 K)

Solving for n, we get:

n = 0.0147 mol \(H_2\)

Since the stoichiometry of the balanced chemical equation tells us that one mole of zinc reacts with one-half mole of hydrogen gas, the number of moles of zinc that reacted is half of the number of moles of hydrogen gas:

n(Zn) = 0.5 × n(\(H_2\)) = 0.00735 mol Zn

Finally, we can convert the moles of zinc to grams using the molar mass of zinc, which is 65.38 g/mol:

m(Zn) = n(Zn) × M(Zn) = 0.00735 mol × 65.38 g/mol = 0.480 g Zn

Therefore, the mass of zinc that reacted is 0.480 g.

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Answer:Burning marshmellows over fire

Explanation:

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.

The tissue that plays this outer covering of a plant for is the  epidermis and its waxy cuticle. It prevents damage to the plant.

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

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Answer:

Light gates

Explanation:

Light gates are used because of their accuracy. They can be set to react very quickly when the beam is broken which eliminates human reaction time errors.

Answer:

The offspring are all black eye colored.

Explanation:

Since we have genes BB for black eye color and genes bb for brown eye color, crossing the genes, the resulting genotypes in the offspring is Bb, Bb, Bb and Bb. We note that all the genes have the dominant B gene. Since the black eye color dominant gene is present in all the offspring, the offspring are thus all black-eye colored.

So, If you will cross a parent with black eye color (BB) and the other is

brown eye (bb), the offspring are all black eye colored.

Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)

From the question we have

actual number = 0.95 g/mL

error = 0.95 - 0.56 = 0.39

We have

\(p(\%) = \frac{0.39}{0.95} \times 100 \\ = 41.0526315...\)

We have the final answer as

Hope this helps you

Phosphate is any salt or ester of phosphoric acid with the chemical formula PO₄³-

According to this question, a chemical compound with the formula; FePO₄ was given. The iron ion has a 3+ charge and the phosphate ion has a 3- charge.

Charge of an ion can be estimated by finding the difference between the number of protons and electrons in the atom.

Phosphate is an ion with charge of -3, hence, it complements an iron ion with charge +3 to form a neutral compound.

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Answer:

92.79%

Explanation:

The Molar mass :

Molar mass of CaC03 = (40 + 12 + (16*3)) = 100 g/mol

Molar mass of Ca0 = (40 + 16) = 56 g/mol

Theoretical yield :

20.4g CaCO3 * 56g Ca0 / 100g CaCO3

= (20.4 * 56)/100 = 11.424 CaO

The actual yield Given is : 10.6g Ca0

The percentage yield is given by :

% yield = Actual yield / theoretical yield

% yield = 10.6 g / 11.424 g * 100%

% yield = 0.9278711 * 100%

Percentage yield = 92.79%

Answer:

The true statement is: "There is more energy in steam at 100°C than water at 100ºC."

This is because steam at 100°C has more thermal energy than water at 100ºC because it has undergone a phase change from liquid to gas, which requires additional energy.

The other statements are not true:

   To condense steam, the temperature must increase, not decrease. Condensation is the process by which a gas (steam) changes phase to a liquid, and this requires the removal of energy, usually through cooling.

   To melt ice, the temperature must increase. Melting is the process by which a solid (ice) changes phase to a liquid, and this requires the addition of energy, usually through heating.

   Iron can exist in all three states of matter (solid, liquid, and gas) depending on the temperature and pressure. However, at room temperature and standard atmospheric pressure, iron is a solid.

Explanation:

The order of the reaction with respect to nitrate ion is 2.3. The activation energy for this reaction is Ea = 148 kJ/mol.

1. The basic form of rate law for the given reaction is as follows:

\(Rate = k [NO3-][I-]^3[H+]^22\).

Given: doubling the concentration of nitrate ion causes the rate of reaction to quadruple.The order of reaction with respect to nitrate ion can be calculated using the formula;

\(k2/k1 = (2^n)\)

where,n is the order of reaction with respect to nitrate ion k1 and k2 are rate constants of reaction at the respective concentrations of nitrate ion.Substituting the values given in the question;

\(4 = (2^n)\)

The value of n can be obtained by solving the equation.

n = 2

Therefore, the order of the reaction with respect to nitrate ion is 2.3.

We can use the Arrhenius equation to calculate the activation energy of the reaction.

\(k = Ae^{(-Ea/RT)}ln\)

\(k = ln A - (Ea/RT)\)

Taking the natural logarithm of both sides of the Arrhenius equation will give the equation of the line in the form y = mx + b,

where y = ln k, x = 1/T, m = -Ea/R, and b = ln A.

The slope of the straight line is -Ea/R.

Therefore,-6114 = (-Ea/R)

Solving for Ea,

Ea = 148 kJ/mol

The activation energy for this reaction is Ea = 148 kJ/mol.

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When an imine is reduced to an amine, a hydrogen signal is observed in the nuclear magnetic resonance (NMR) spectrum that is indicative of the newly formed amine group.

Specifically, a broad singlet peak is typically observed in the NMR spectrum at around 2-3 ppm, which corresponds to the protons attached to the nitrogen atom in the amine.

This peak is distinct from the peak observed for the protons attached to the carbon atoms in the molecule, which typically appear as sharp peaks at around 0-2 ppm in the NMR spectrum.

Additionally, the chemical shift of the amine proton peak is typically lower than that of the imine proton peak, which is typically observed at around 6-8 ppm in the NMR spectrum.

Therefore, the presence of a broad singlet peak at around 2-3 ppm in the NMR spectrum is strongly indicative that the imine has been successfully reduced to the amine.

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Zinc sulfate (ZnSO4) can serve as a good source of zinc for the body. It is a water-soluble salt that can provide zinc ions for absorption in the gastrointestinal tract.

Ingesting zinc ions has been shown to have some effect in reducing the length of a cold. Therefore, zinc sulfate can be an effective option for boosting zinc levels in the body and potentially supporting immune function during a cold.

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F = 13 N

Given

Acceleration= a = 2.6 m/s²

Required

Force

Solution

Newton's second law :

ΣF = m x a

The wheeled cart used in the experiment is the same, so the mass used is the same

We use one of the data for example data 1 to find mass :

F = 1 N, a = 0.2 m/s²

m = F/a

m = 1/0.2

m = 5 kg

so for acceleration= a = 2.6 m/s² :

F = 5 kg x 2.6 m/s²

F = 13 N

Answer:

A part.

Explanation:

Because the reactants must be the exact same as the the products.

The first step we have to follow is to find the molar mass of FeCl2 using the atomic masses of each element:

It means that each mole of FeCl2 has a mass of 126.745g/mol.

Use the molar mass to find the mass of the given amount of moles:

It means that there are 110,141.405 grams of FeCl2.

In scientific notation it would be 1.10x10^5g.

there are 110,141.405 grams of FeCl2

We expect the release of PCO2 from the bottle, When the cork is pulled.

When the cork is pulled, we expect the release of PCO2 in the atmosphere to happen because there is high concentration of PCO2 in the bottle but there is no concentration of PCO2 in the atmosphere so due to diffusion, the PCO2 gas moves outside the bottle.

So we can conclude that When the cork is pulled, the release of PCO2 from the bottle will be expected.

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Answer:

No, not all are harmful.

Explanation:

There are bacterias that are harmful, yes, but millions, maybe even billions are helpful. Probiotics, healthy bacteria, as some like Lactobacilli and Bifidobacterium. There are a lot more, but just these two examples are helpful. Lactobacili is helpful with your digestive system. Bifidobacterium is geared towards your mouth and the vaginal area of women in mammals, like humans.

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I hope this helps!

-No one

Answer:

1)no

2)yes

Explanation:

Answer:

I guess yes it seems like a trick question

Explanation:

Answer: Confidence, strength, potential

Explanation:

\( \huge \boxed{ \fcolorbox{black}{pink}{Answer}}\)

20 Distinguishing Personality Traits of High-Performing Athletes

1. Self Confidence. “Self-Confidence” isn't just a phrase for cheesy motivational posters. ...

2. Strong Sense of Motivation. It takes more than a shiny medal or hefty check to motivate the world's best athletes. ...

3. Inner Desire to Succeed. ...

4. Natural Goal Setter. ...

5. Self-Discipline. ...

6. Optimism. ...

7. Sense of Belonging. ...

8. Natural Leader.

To "fix" hydrogen means to convert it from its gaseous form (H₂) into a chemically usable form or compound.

Fritz Haber's method for fixing hydrogen, known as the Haber-Bosch process, involves combining hydrogen (H₂) with nitrogen (N₂) from the air to produce ammonia (NH₃) through a catalytic reaction. This ammonia can then be used to produce fertilizers, explosives, and other important chemicals.

Fritz Haber's method is considered the most important invention of the twentieth century because it revolutionized agriculture and food production. The production of ammonia-based fertilizers made it possible to significantly increase crop yields, addressing global food shortages and supporting a growing population.

This process had a profound impact on global agriculture and played a crucial role in the Green Revolution, which helped alleviate hunger and improved living standards worldwide.

Additionally, the Haber-Bosch process also enabled the production of synthetic materials, such as plastics and fibers, that have transformed various industries and contributed to technological advancements.

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Answer:

50kg

Explanation:

Using the formula for potential energy, which is the amount of energy due to position;

P.E = m × g × h

Where;

m = mass (kg)

g = acceleration due to gravity (10m/s²)

h = height (metres)

According to the information provided in this question, m = ?, P.E = 2500J, h = 5m

Using P.E = m × g × h

m = P.E/gh

m = 2500/(5 × 10)

m = 2500/50

m = 50kg

The mass of the man is 50kg.

Answer:

\({ \bf{from \: ionic \: product \: of \: water : }} \\ { \boxed{ \tt{k _{w} = [H _{3} O {}^{ + } ][OH {}^{ - } ]}}} \\ \\ { \tt{1 \times {10}^{ - 14} = (1 \times {10}^{ - 5} ) [OH {}^{ - } ]}} \\ \\ { \tt{[OH {}^{ - } ] = 1 \times {10}^{ - 9} }} \: M\)

A solution has an [H3O+] of 1 × 10−5 M the [OH−] of the solution will be 1 × 10−9 M and option C is correct.

The water is made up of H2O only and when the pH of it is 7 then the concentration of all the ions would be the same while dissociation the water will get dissociate into H+ ions and OH- ions.

The concentration of OH- ions will be

OH- = Kw {H3O+}

{H3O+} = 1 × 10−5 M.

Kw = 14

substituting the value in the equation,

OH = 14 { 1 × 10−5 M.}

OH = 1 × 10−9 M

Therefore, the solution has an [H3O+] of 1 × 10−5 M the [OH−] of the solution will be 1 × 10−9 M and option C is correct.

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Answer:

its d injus took the test

Explanation:

Decreasing the temperature in order to increase molecule collisions would not increase the rate of dissolving.

This is defined as causing a solute to pass into a solution through the aid of the solvent.

Increasing the temperature will increase molecule collisions and the rate of dissolving which was why option D is chosen as the most appropriate choice.

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If the student do not completely dry the Erlenmeyer flask after heating and let it cool and obtains the mass, then the results will not be accurate.

It is necessary to dry the flask before calculating the mass, since the water particle in the flask will increase the volume of acid which will give change in the concentration of the acid.

And so it is 100% sure that the student will get wrong results.

To avoid such mistakes in the results, flasks must be dried up properly in an electric oven between 80°C to 90°C or by rinsing the flasks with a volatile solvent which can evaporate within few seconds and hence gives moisture free dried flasks.

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