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Answer:

i think paint

Explanation:

The amount of copper in moles in the 27.5 g pure copper sheet is approximately 0.433 moles.

To calculate the amount of copper in moles in a pure copper sheet, we need to use the molar mass of copper and the given mass of the sheet.

The molar mass of copper (Cu) is approximately 63.55 g/mol. This value represents the mass of one mole of copper atoms.

Given that the mass of the pure copper sheet is 27.5 g, we can calculate the number of moles using the following formula:

moles = mass / molar mass

Substituting the values:

moles = 27.5 g / 63.55 g/mol

moles ≈ 0.433 mol

Therefore, the amount of copper in moles in the 27.5 g pure copper sheet is approximately 0.433 moles.

To arrive at this result, we divided the given mass of the sheet (27.5 g) by the molar mass of copper (63.55 g/mol). This calculation allows us to convert the mass of the sheet into the corresponding number of moles of copper.

The result tells us that the 27.5 g pure copper sheet contains approximately 0.433 moles of copper atoms. This conversion to moles is useful in various chemical calculations and allows for easier comparison and analysis of quantities on a molecular scale.

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2 moles of \(O_{2}\) gas and 1 mole of \(NO_{2}\) gas would be produced from 2 moles of \(HNO_{3}\) during electrolysis.

What is an electrolysis?

Electrolysis of nitric acid using graphite electrodes would result in the following reactions at the anode and cathode:

At the anode (oxidation):

\(2HNO_{3}\) + 4 e- → \(O_{2}\) + \(2NO_{2}\) + \(2H_{2}O\)

At the cathode (reduction):

\(2H^{+}\) + 2 e- → \(H_{2}\)(g)

Overall reaction:

\(2HNO_{3}\) (aq) +\(2H^{+}\)(aq) + 4 e- →  \(O_{2}\)(g) + \(2NO_{2}\)(g) + \(2H_{2}O\)(l)

This means that for every 2 moles of nitric acid, 1 mole of \(O_{2}\) gas is produced. The products of the electrolysis are  \(O_{2}\) gas, \(NO_{2}\) gas, and \(H_{2}O\).

The concentration of the nitric acid (4 mol/L) indicates that there are 4 moles of \(HNO_{3}\) in 1 liter of solution. To calculate the number of moles of  \(HNO_{3}\) in a given volume of solution, we can use the following formula:

moles of solute = concentration × volume (in liters)

For example, if we have 500 mL (0.5 L) of the 4 mol/L nitric acid solution, the number of moles of \(HNO_{3}\) present would be:

moles of \(HNO_{3}\) = 4 mol/L × 0.5 L = 2 moles

Therefore, 2 moles of \(O_{2}\) gas and 1 mole of \(NO_{2}\) gas would be produced from 2 moles of \(HNO_{3}\) during electrolysis.

It's worth noting that the oxidation of nitric acid to form nitrogen dioxide is an exothermic reaction that can produce heat, so the electrolysis may need to be performed under controlled conditions to prevent overheating. Additionally, nitrogen dioxide is a toxic gas that should be handled with care in a well-ventilated area.

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Complete question is: An aqueous solution of 4mol/L nitric acid is electrolysed in an electronic cell using graphite electrodes produced 2 moles of \(O_{2}\) gas and 1 mole of \(NO_{2}\) gas from 2 moles of \(HNO_{3}\) during electrolysis.

Answer:

The hydrolysis reaction of propyl propanoate is as follows:

Propyl propanoate + Water → Propanoic acid + Propanol

The balanced chemical equation for this reaction is:

CH3CH2COOCH2CH2CH3 + H2O → CH3CH2COOH + CH3CH2CH2OH

The hydrolysis reaction of N, N-dimethyl propanamide is as follows:

N, N-dimethyl propanamide + Water → Propanoic acid + Dimethylamine

The balanced chemical equation for this reaction is:

CH3CH2CON(CH3)2 + H2O → CH3CH2COOH + (CH3)2NH

Answer:

name four agricultural inputs are subsidized by the government

0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Given,

mass = 10g

c = 0.901J/g⁰C

Initial temperature (T₁) = 22⁰C

Final Temperature (T₂) = 55⁰C

Q = mcΔT

= 10 × 0.901 × (55 -22)

= 297.33 J = 0.297 kJ

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Answer:

Everything in the universe has mass.

Explanation:

The lewis structure of Chloamine can be given as above.

If one element shares electron with another elements to form bond. This is called as covalent bond. The compound which contain Covalent bond called Covalent compound.

Nitrogen is one of the elements of periodic table. It has 7 as atomic number and 14 as mass number. Its electronic configuration is 1s2 2s2 2p3. It belongs to 15th group and 2nd period of the periodic table. It accept three electron to get stable electronic configuration.

As we know that, chloramine has the chemical formula NH2Cl. Nitrogen has five valence electrons, each hydrogen has one valence electron, and chlorine has seven valence electrons.

Thus, we concluded that Nitrogen form three single bond two with hydrogen and one with chlorine atom.

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The partial pressure of hydrogen is 0.98 atm while the partial pressure of water is 0.02 atm. The total pressure of the system is 1 atm.

We have seen the reaction as it has been shown in the equation that is attached to the question above. Now, we must have to find the number of moles of the hydrogen that was obtained.

Number of moles of sodium =  1.90 g/23 g/mol = 0.08 moles

2 moles of sodium produces 1 mole of hydrogen

0.08 moles of sodium would produce 0.08 moles * 1 mole/ 2 moles

= 0.04 moles

Given that;

P = pressure

V = volume

n = Number of moles

R = gas constant

T = temperature

PV = nRT

P = nRT/V

P = 0.04 * 0.082 * 298/1

P = 0.98 atm

The partial pressure of the hydrogen = 0.98 atm

The partial pressure of the water = SVP of water at 18°C = 0.02 atm

Total pressure of the system =  0.98 atm +  0.02 atm = 1 atm

The system has a total pressure of 1 atm.

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Answer:

This is true

Explanation:

Answer:

b. Double displacement.

Explanation:

It is a double displacement reaction, because in this case, hydrogen atom in HBr is replaced by a sodium atom (from NaOH), and the sodium atom (in NaOH) is replaced by another H atom from HBr molecule, to form H2O.

The viscosity, which affects the amount of friction between water molecules, also plays a role. Despite the low viscosity of water, friction is still a problem. All moving fluids constantly lose energy as a result of rubbing against their surroundings. Water will move from high-energy regions to low-energy ones.

When it comes to confined aquifers, the situation becomes much more complicated, but we still need to understand how they function because they are significant water sources. demonstrates that even if the geological materials at the surface have very low permeability, there is always a water table. This aquifer will have its own "water table," which is actually called a potentiometric surface because it is a measure of the total potential energy of the water, wherever there is a confined aquifer, which is one that is separated from the surface by a confining layer. The potentiometric surface for the confined aquifer  as a red dashed line. It represents the total energy that the water is under. inside the restricted aquifer. The water will rise to the water table if we drill a well into the unconfined aquifer. But if we drill a well into the confined aquifer through both the confining layer and the unconfined aquifer, the water will rise to the level of the potentiometric surface above the top of the confined aquifer. Due to the fact that the water rises above the aquifer's surface, this is referred to as an artesian well.

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Answer:

Many areas of the United States experience explosive population growth. The more people that reside someplace, the more demand there is for water there. Often these urban-growth expansions are unplanned and place extraordinary stress on the water supply system, mainly on the groundwater. The stress often depletes groundwater supply, thereby causing wells to dry up. Then water must be brought from somewhere else to support the local population.

Such situations have occurred all over the United States. For example, increased population growth in the southwestern United States has significantly lowered the water table 50 to 200 feet (depending on the area) since the 1940s. Managing urban growth, efforts to reduce water demand, conservation of the resource, and attempts to increase the water supply all address the problem of exceeding water resource limits.

Human activities affect groundwater quality.

Here are some sources and possible solutions to groundwater pollution:

Agriculture—Reduce usage of pesticides and fertilizers.

Landfills—Monitor for leakage and repair linings.

Underground storage tanks—Remove damaged and unused tanks.

Household wastes—Properly dispose of household hazardous waste.

Septic tank leaks—Properly maintain and repair tanks.

Explanation:

This came from the K12 learning course read this and the answer will be there. I underlined the important parts for the answer.

This problem is providing us with the concentration of an oral suspension of amoxicillin as 200 mg / 5 mL, so the volume per dose is required, taking into account a patient must take 500 mg every six hours. At the end, the result turns out to be 12.5 mL according to:

In chemistry, we use dimensional analysis to calculate a requirement, based on given information to do so. Despite not having a formula for every problem, one can use the units a reference.

For instance, this problem asks for volume yet 200 mg / 5 mL has the volume at the bottom of the proportional factor. This means we need to flip it and then multiply by 500 mg in order to get rid of the milligrams and thus get the volume:

\(V=500mg*\frac{5mL}{200mg} \\\\V=12.5mL\)

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The weather condition is NOT associated with warm fronts is: "warm fronts typically produce more violent weather than cold front" (Option A)

This is because, quite to the contrary, warm fronts are less likely to create violent weather than cold fronts. Warm fronts are connected with gradual ascension zones (i.e. stratiform clouds and precipitation).

Clouds and precipitation are common ahead of the warm front. Warm fronts travel far more slowly than cold fronts.

Weather fronts frequently indicate the type of weather that is on its way: Cold fronts, for example, provide heavier, denser air that pushes beneath the lighter warm front.

Winds grow gusty as the cold front passes. There is a sharp drop in temperature, as well as heavy rain, occasionally accompanied by hail, thunder, and lighting.

Cold fronts produce the most common type of cloud, cumulus clouds. They frequently develop into cumulonimbus clouds, which cause thunderstorms. Nimbostratus, stratocumulus, and stratus clouds can also be produced by cold fronts.

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Answer:

Nitrobenzene is too deactivated (by the nitro group) to undergo a Friedel-Crafts alkylation.

Explanation:

The benzene ring in itself does not easily undergo electrophilic substitution reaction. Some groups activate or deactivate the benzene ring towards electrophilic substitution reactions.

-NO2 ia a highly deactivating substituent therefore, Friedel-Crafts alkylation of nitrobenzene does not take place under any conditions.

This reaction scheme is therefore flawed because Nitrobenzene is too deactivated (by the nitro group) to undergo a Friedel-Crafts alkylation.

This elements or substances that are not a metal are called non-metals.

I think that the answer is Non-metal

Answer:

methane

Explanation: methane is obtained from the decaying of flora and fauna mostlyunder damp

The moles of the water produced by the reaction of 0.070 mol of ammonia is the 0.175 mol.

The reaction is given as:

4NH₃(g)  +  5O₂(g)   --->  4NO(g)  +  5H₂O(g)

The moles of ammonia, NH₃ = 0.070 mol

The moles if substances can be calculated as :

The number of moles = mass / molar mass

The 4 moles of the NH₃ will produces the 4 moles of NO

4 moles of ammonia, NH₃ produces the 5 moles of water , H₂O

The moles of water, H₂O = ( 5 / 2 ) × 0.070 mol

                                        = 0.175 mol

Thus, the moles of water, H₂O is 0.175 mol.

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The statement that describes the law of conservation of energy is Energy cannot be created nor destroyed, but it changes from one form to another.

This statement reflects the principle of the law of conservation of energy, also known as the first law of thermodynamics. According to this law, the total energy of an isolated system remains constant over time. Energy may change from one form to another (such as potential energy to kinetic energy or thermal energy to mechanical energy), but the total amount of energy within the system remains unchanged.

This law is based on the principle that energy is a fundamental property of nature and that it is conserved in all processes. It applies to various systems, from microscopic particles to large-scale systems like the universe.

The law of conservation of energy is a fundamental principle in physics and has broad implications for understanding and analyzing various phenomena and processes, including chemical reactions, mechanical systems, and thermodynamics.

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The correct answer is B) +4. This is because the oxidation number of the manganese atom (Mn) in MnO₂ is +4.

The oxidation number of an atom is a number assigned to an element in a chemical compound that indicates the total number of electrons that an atom has lost or gained. Oxidation numbers are typically written with a plus or minus sign to indicate whether an atom has lost or gained electrons. Oxidation numbers can be used to determine the type of reaction taking place in a chemical reaction and the type of bonds formed. Oxidation numbers are also useful for recognizing the oxidation state of an element in a compound. The oxidation number of an atom in its elemental form is always zero.

This is because the oxidation number of oxygen (O) is always -2, and the oxidation number of the compound must add up to 0. Therefore, the oxidation number of Mn must be +4 in order for the compound to have an overall charge of 0.

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Answer:

Hello attached below is the data found in Aleks Data tab

answer :

i) N0

ii) N0

iii) YES ,  pH of highest solubility = 5

Explanation:

i) For CuBr

solubility does not change with pH  hence answer = NO

ii) For MgCl2

solubility does not change with pH hence the answer = NO

iii) For Ba(OH) 2

Solubility does change with pH hence the answer = YES

and the pH at which the highest solubility will occur is = 5

attached below is the reason for the answers given

to prevent the glucose undergoing isomerization to an aldehyde, or fructose to alpha-hydroxy-ketone form. 

If there is no coefficient in front of a molecule, assume the number is __1__.

Subscripts - Part of the chemical formulas of reactants and products that indicate the number of atoms in the preceding element.

Coefficient - A small integer that precedes the formula in the balanced chemical formula. The index is the number of atoms of the element in that molecule. The coefficient tells you how many of that numerator there are.

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Answer:

1

Explanation:

Answer:

3. NH3 is limiting

4. 90 g NO

Explanation:

3. To find the limiting reactant, you have to convert from moles of reactant to moles of product. In this case, because we need to know how many grams of NO in the second question, we will use NO as our product. We use the ratios found in the chemical formula.

\(3 mol NH3*\frac{4 molNO}{4 mol NH3} = 3molNO\)

\(6 mol O2*\frac{4 molNO}{5 mol O2} = 4.8molNO\)

Because NH3 makes less moles of NO, it is the limiting reactant.

4. Now we need the molar mass to convert the moles of NO into grams of NO. The molar mass of NO is 30.01g/mol. This is the equation.

\(3 mol NO*\frac{30.01g NO}{1 mol NO} = 90.03gNO\)

Because there are is only one significant figure in the original numbers, we round to one significant figure = 90 g NO.

Answer:

What's the gas given in the question??

Sry I'm a minor and do not have the amount of brain cells to compute this equation. :')

Answer:it is in the first sentence

Explanation:i did this and got it correct

An instantaneous dipole occurs when a molecule's moving electrons are briefly more concentrated in one place than another, causing the molecule to become temporarily polarized.

The correct option is True.

Dipoles refer to a separation of charges where one end of a substance has a  positive charge while the other end has a negative charge.

In chemical compounds, dipoles occur within a molecule that has covalently bonded atoms or atoms that share electrons in the covalent bond.

The dipole may be permanent dipoles or temporary dipoles.

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