How many moles of nitrogen gas would be produced if 6.42 moles of
copper(II)oxide were reacted with excess ammonia in the following
chemical reaction?
2 NH3(g) + 3 CuO (s) → 3 Cu(s) + N₂(g) + 3 H₂O(g)

The following balanced chemical equation may be used to describe the interaction between aluminum (Al) and calcium nitrate (Ca(NO₃)₂):

2 Al + 3 Ca(NO₃)₂ → 2 Al(NO₃)3 + 3 Ca

Reactants are the chemicals that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.

The substances that initiate a chemical reaction. Products are the substances that are created during the reaction. Compounds or elements can act as reactants and products.

Aluminium and calcium nitrate interact in this reaction to form aluminium nitrate (Al(NO₃)₃) and calcium (Ca), which are the end products.

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Answer:

6KCl(aq) +  Mg3(PO4)2(s)  ...  balanced equation

Explanation:

Answer:

I will find the different between the samples

The balanced chemical equation for the reaction is:

2NaOH(aq) + FeCl₂(aq) --> 2NaCl(aq) + Fe(OH)₂(s)

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

Sodium hydroxide => NaOH

Iron (II) chloride => FeCl₂

2NaOH(aq) + FeCl₂(aq) --> 2NaCl(aq) + Fe(OH)₂(s)

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Significant figures are as follows:

zero before (0.12 = 3 sig fig)

zero trapped (1.02 = 3 sig figs, or 0.012 = 3 sig figs)

zero on the end for whole number (120 = 2 sig figs)

zero on the end for decimal (1.20 = 3 sig figs)

Here are the first couple of answers:

1. 3

7. 2

13. 2

2. 2

8. 4

1) List the known quantities

Initial conditions

Concentration 1: 1.6 M

Volume 1: 175 mL

Final conditions

Volume 2: 1 L

Concentration 2: unknown

2) Set the equation

3) Convert units

Volume

1 L = 1000 mL

4) Plug in the known quantities and solve for C2

The new concentration is 0.28 M.

.

Answer: B is correct.

Explanation:

Answer A is a chemical change because of intense changes of color and expansion.

Answer C is a chemical change, as hydrogen and water are chemically bonding together.

Answer D is a chemical change because oxidation involves loss of electrons during a chemical reaction.

On the other hand, melting is a physical change. Therefore, answer B is the correct answer.

The equilibrium pressure of the nitrogen oxide is given as 4 atm.

Kp is the equilibrium constant for a chemical reaction in terms of partial pressures. It is defined as the ratio of the product of the partial pressures of the products raised to their stoichiometric coefficients to the product of the partial pressures of the reactants raised to their stoichiometric coefficients

We know that;

Kp = \(pNO_{2} ^2/pN_{2} ^2 . pO_{2}\)

\(3.2 * 10^-28 = (2x)^2/(3.21 - 2x) (6.21 - x)\\3.2 * 10^-28 = 4x^2/19.9 - 3.21x - 12.42x + 2x^2\\3.2 * 10^-28(19.9 - 15.63x + 2x^2) = 4x^2\\6.4 * 10^-27 - 5 * 10^-27 x + 6.4 * 10^-28x^2 = 4x^2\\x = 4 atm\)

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The numbers that will be rounded up are 124.77, 7.077, 19.45 and 3.179  and the numbers which will be rounded down are 4.318, 8878.2403, 66.9106 and 5.84.

To round off the decimal numbers to their nearest tenths, we look at the  number on the hundredth place. If that particular number is greater than 5, we add 1 to the tenth value. If the number is less than 5, we leave the tenth place value as it is, and we also remove all the numbers which are present after the tenth’s place.

The numbers which will be rounded up are 124.77, 7.077, 19.45 and 3.179 since the digit on the hundredth place are greater than 5. The numbers which will be rounded down are 4.318, 8878.2403, 66.9106 and 5.84 since the digit on the hundredth place is lower than 5.

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Answer:

d

Explanation:

its chemical energy

Answer:

D.

Explanation:

Chemical energy....

Answer: it's known as heat transfer

Explanation: Heat always moves from a warmer substance to a cooler substance. For example, holding an ice cube will make your hand begin to feel cold in a few seconds. But is the coldness in the ice cube moving to your hand? No! Since cold is the absence of heat, it’s the heat in your hand that moves to the ice cube. This is one of the ways that heat is transferred.

According to the concept of thermal energy, heat transfer in a circular motion is called as convection.

Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.

Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.

These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.There are three types of thermal energy.

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Answer- Incomplete combustions of alkanes are dangerous as it leads to  toxic gases such as carbon monoxide man odorless,colorless and highly poisonous gas to be released in the air

Environmental impacts of burning fossil fuels such as alkanes can have a massive impact of global warming in which heat is prevented from the leaving the atmosphere due to a build-up of carbon dioxide ad other compounds, collectively known as greenhouse gases. In order to make these impacts less severe scientists have found alternative fuels, such as biofuels and biodiesels, this can reduce the risk of harm to the world as alternative fuels produce less CO2 and air pollutants then others that run on petrol and diesel

Answer:

Please find the terms with their correct description in the explanation section.

Explanation:

An electrolyte is a substance that dissociates or ionizes into cations (positive charged ions) and anions (negative charged ions) in an aqueous solution. An electrolyte can either be strong or weak depending on how well it ionizes and its level of conductivity. However, a non-electrolyte neither ionizes in a solution nor conducts electricity.

Based on this;

1. Weak electrolyte: Has a medium level of conductivity i.e. partially conducts electricity

2. Strong electrolyte: Contains a complete solute

3. Non-electrolyte: Has little or no conductivity i.e. cannot conduct electricity because it doesn't dissociate into ions.

4. Strong electrolyte: Has the highest conductivity i.e. conducts electricity very well.

5. Strong electrolyte: Contains a completely dissociated solute i.e. the solute of the electrolyte separates into anions and cations completely.

6. Weak electrolyte: Contains a partially dissociated solute i.e. the ions of the solute do not ionize completely in the solution.

Weak electrolyte, strong electrolyte, non-electrolyte, strong electrolyte strong electrolyte and weak electrolyte are the answers of the each statement.

Has a medium level of conductivity means it conducts partially electricity not fully so we can say that it is a weak electrolyte. It also contains a partially dissociated solute i.e. the solute do not ionize completely into ions in the solution.

Contains a complete solute as well as has the highest conductivity means conducts electricity better refers to Strong electrolyte. It contains a completely dissociated solute i.e. the solute of the electrolyte separates into anions and cations completely so that's why it conducts electricity very well. Non-electrolyte has little or no conductivity means it cannot conduct electricity due to no dissociation into ions.

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Answer:

denser than freshwater due to the sodium chloride dissolved in it.

Explanation:

t. This means that a specific volume of salt water is heaver than the same volume of freshwater. ... While colder water is denser, when water freezes into ice, it becomes less dense and floats on the surface

The total number of atoms in 3.75 mol of ammonium nitrate, NH4NO3, is equal to the Avogadro's number, which is 6.022 x 10^23, times the number of moles, which is 3.75 in this case.

Thus, the total number of atoms in 3.75 mol of ammonium nitrate is equal to 2.26 x 10^24 atoms.

This number can be further broken down into the number of atoms of each element present in the compound. Ammonium nitrate is composed of two elements, nitrogen (N) and hydrogen (H). For each mole of ammonium nitrate, there are 4 moles of hydrogen atoms and 2 moles of nitrogen atoms.

Therefore, in 3.75 moles of ammonium nitrate, there are 15 moles of hydrogen atoms and 7.5 moles of nitrogen atoms, which is equal to 9 x 10^24 hydrogen atoms and 4.05 x 10^24 nitrogen atoms.

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" Volume is the amount of space occupied by a substance, while mass is the amount of matter it contains." -What Is the Definition of Volume in Science? - ThoughtCo

-1113.5kJ is the theoretical enthalpy of combustion.

What makes energy different from enthalpy?

The entire amount of heat energy that is either absorbed or released in a thermodynamic system is measured by enthalpy. Internal energy denotes all of the potential or moving energy present in a thermodynamic system.

Enthalpy of combustion is the term used to describe the change in a system's enthalpy that occurs when one mole of a substance fully burns in oxygen or air at a specific temperature.

C₂H5OH()+302(g) → 2CO2(g) + 3H₂O(1)

Reactants:

5 C-H : 5*412

1 C-C : 348

1 C-O: 358

3 O=O: 3* 496

1 O-H: 463

Products:

2*2 C=O : 4*743

2*3 O-H: 6*463

Enthalpy of Vaporization (kJ mol-¹) for :

Ethanol 42.5

Water 41​

Enthalpy of combustion : (5*412 + 348 + 358 + 3* 496 + 463 + 42.5) - ( 3*41 + 4*743 + 6*463)    

                                        : -1113.5kJ

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Answer:

Where are what located no picks no pdf so what?

The revenues of the note will equal the $225,000 face value, provided the note has an interest rate of 8%.

On Friday, December 9, 2022, the benchmark 30-year fixed mortgage's average rate is 7.32%, which is a 15 basis point increase from the previous week. If you want to restructure your present mortgage.

The nominal value and face value are both used interchangeably. That which a money is worth. Simply said, it is a security's nominal value. A 45-day note having a face value of $225,000 was issued by Nyree Co. to Conrad Bank based on the information provided. Consequently, the amount of the note's revenues will match its face value, which is 225,000.

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Due to the fact that hydrogen only has one electron in its outermost shell, it can only create one covalent connection with an atoms. Although hydrogen configuration of hydrogen is 1s1, and the 1s orbital's

The fundamental building components of matter are atoms. They have an electron-surrounded nucleus made up of protons and neutrons. The element to which an atom belongs is determined by the quantity of protons in the nucleus. For instance, all hydrogen atoms contain a single proton but all carbon atoms have six protons in their nucleus. Atoms may combine to create molecules, which are the building blocks of everything around us. Atoms may also join together to create compounds, which differ from the sum of their component atoms in terms of their chemical and physical characteristics. Atomic science or atomic physics is the study of atoms and how they behave.

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Answer:

0.938 L.

Explanation:

The ideal gas law states that the product of pressure and volume is equal to the product of moles, the ideal gas constant and the temperature.

Since the pressure and temperature are constant and we know the volume of water vapor is 0.510 L, we can use that information to find the moles of water vapor.

n = PV/RT

The ideal gas constant R = 8.314 Latm/molK

n = 0.510 L * 1.64 atm / (8.314 Latm/molK * 373 K) = 0.001085 mol

Now we know the moles of water vapor at 373 K and 1.64 atm.

The reaction that takes place is:

CH4(g) + 2H2O(l) --> CO2(g) + 4H2(g)

This is a balanced equation, with the number of moles of each substance on both sides of the equation being equal.

So, the number of moles of methane required to convert 0.510 L of water to water vapor is 0.001085 mol/2 = 0.0005425 mol

Now we can use the ideal gas law to find the volume of methane measured at 298 K and 1.64 atm required to convert 0.510 L of water to water vapor at 373 K

V = nRT/P

V = 0.0005425 mol * 8.314 Latm/molK * 298 K / 1.64 atm = 0.938 L

Therefore, the volume of methane measured at 298 K and 1.64 atm required to convert 0.510 L of water to water vapor at 373 K is 0.938 L.

Answer: In a full cycle of proton proton chain reaction, a helium nucleus is formed by the four hydrogen nuclei and a huge amount of energy nearly 0.7 percent of the original mass is lost.

Explanation: The Sun gets its energy when hydrogen nuclei are fused together to form helium nuclei within the solar core. This hydrogen burning is described by a sequence of nuclear fusion reactions called the proton-proton chain. Overall, this chain successively fuses four protons together to make one helium nucleus.

Answer:

B

Explanation:

"I think my bike is making a scraping noise because the bearings are not lubricated."

The following are categorized into polar or nonpolar molecules:

a) Beryllium chloride (BeCl₂) is a nonpolar molecule. The Be-Cl bond is polar due to the electronegativity difference between beryllium and chlorine, but the molecule is linear with the two polar bonds pointing in opposite directions, resulting in a net dipole moment of zero.

b) Hydrogen sulphide (H₂S) is a polar molecule. The H-S bond is polar due to the electronegativity difference between hydrogen and sulfur, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.

c) Sulphur trioxide (SO₃) is a nonpolar molecule. The S-O bonds are polar due to the electronegativity difference between sulfur and oxygen, but the molecule is trigonal planar with the three polar bonds pointing in different directions, resulting in a net dipole moment of zero.

d) Water (H₂O) is a polar molecule. The H-O bond is polar due to the electronegativity difference between hydrogen and oxygen, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.

e) Trichloromethane (CHCl₃) is a polar molecule. The C-Cl bonds are polar due to the electronegativity difference between carbon and chlorine, and the molecule has a tetrahedral shape, resulting in a net dipole moment that is not zero.

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The element fluorine has 9 electrons. The electron configuration for an atom of fluorine is 1s2 2s2 2p5.

Fluorine is one of the element of the periodic table. It have 9 as atomic number and 19 as mass number. The electronic configuration of fluorine is 1s2 2s2 2p5. It belongs to 17th group. It is most electronegative atom. Because it accept one electron to get stable electronic configuration.

It belongs to 2nd period and belongs to p-block.

In the quantum chemistry and atomic physics, the electron configuration is defined as the distribution of the electrons of an atom or molecule in molecular or atomic orbitals. Electrons first enter clock wise then anti clockwise.

Thus, we concluded that element fluorine has 9 electrons. The electron configuration for an atom of fluorine is 1s2 2s2 2p5.

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Answer:

Copper will start to react with the oxygen in the air to form copper oxide. The copper oxide will continue reacting to oxygen over time. As the copper oxide continues to react with carbon dioxide and water in the air it coats the surface with that iconic blue-green patina colour

The net ionic equation for the reaction between potassium sulfide and magnesium iodide is S2- + Mg2+ -> MgS, as the potassium and iodide ions are spectator ions and do not participate in the reaction.

To determine the net ionic equation for the reaction between potassium sulfide (K2S) and magnesium iodide (MgI2), we first need to identify the ions present in each compound and then determine the products formed when they react.

Potassium sulfide (K2S) dissociates into two potassium ions (K+) and one sulfide ion (S2-):

K2S -> 2K+ + S2-

Magnesium iodide (MgI2) dissociates into one magnesium ion (Mg2+) and two iodide ions (I-):

MgI2 -> Mg2+ + 2I-

Now, we need to determine the possible products when these ions combine. Since potassium (K+) has a +1 charge and iodide (I-) has a -1 charge, they can combine to form potassium iodide (KI):

K+ + I- -> KI

Similarly, magnesium (Mg2+) and sulfide (S2-) can combine to form magnesium sulfide (MgS):

Mg2+ + S2- -> MgS

Now, we can write the complete ionic equation by representing all the ions present before and after the reaction:

2K+ + S2- + Mg2+ + 2I- -> 2KI + MgS

To obtain the net ionic equation, we remove the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the actual reaction. In this case, the spectator ions are the potassium ions (K+) and the iodide ions (I-).

Thus, the net ionic equation for the reaction between potassium sulfide and magnesium iodide is:

S2- + Mg2+ -> MgS

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Answer:

\(0.175\; \rm mol \cdot L^{-1}\).

Explanation:

Magnesium chloride and silver nitrate reacts at a \(2:1\) ratio:

\(\rm MgCl_2\, (aq) + 2\, AgNO_3\, (aq) \to Mg(NO_3)_2 \, (aq) + 2\, AgCl\, (s)\).

In reality, the nitrate ion from silver nitrate did not take part in this reaction at all. Consider the ionic equation for this very reaction:

\(\begin{aligned}& \rm Mg^{2+} + 2\, Cl^{-} + 2\, Ag^{+} + 2\, {NO_3}^{-} \\&\to \rm Mg^{2+} + 2\, {NO_3}^{-} + 2\, AgCl\, (s)\end{aligned}\).

The precipitate silver chloride \(\rm AgCl\) is insoluble in water and barely ionizes. Hence, \(\rm AgCl\!\) isn't rewritten as ions.

Net ionic equation:

\(\begin{aligned}& \rm Ag^{+} + Cl^{-} \to AgCl\, (s)\end{aligned}\).

Calculate the initial quantity of nitrate ions in the mixture.

\(\begin{aligned}n(\text{initial}) &= c(\text{initial}) \cdot V(\text{initial}) \\ &= 0.25\; \rm mol \cdot L^{-1} \times 0.150\; \rm L \\ &= 0.0375\; \rm mol \end{aligned}\).

Since nitrate ions \(\rm {NO_3}^{-}\) do not take part in any reaction in this mixture, the quantity of this ion would stay the same.

\(n(\text{final}) = n(\text{initial}) = 0.0375\; \rm mol\).

However, the volume of the new solution is twice that of the original nitrate solution. Hence, the concentration of nitrate ions in the new solution would be \((1/2)\) of the concentration in the original solution.

\(\begin{aligned} c(\text{final}) &= \frac{n(\text{final})}{V(\text{final})} \\ &= \frac{0.0375\; \rm mol}{0.300\; \rm L} = 0.175\; \rm mol \cdot L^{-1}\end{aligned}\).

Answer:

The answer is A. Aquifer

Explanation:

It stores groundwater.