Which of the following phenomena can only be explained by considering the wave nature of light? Select the correct answer below: - Reflection - Refraction - Interference - None of the above

The molecular, ionic, and net ionic equations of the reaction between potassium phosphate and copper (II) acetate are given below.

The physical states of the substances are depicted in the balanced chemical equation known as a molecular equation, which we may determine using the solubility principles.

When formulae for compounds are expressed as though they were all molecules, the equation is referred to as a molecular equation.

When dissolved ionic chemicals are represented as free ions, the equation is said to be an ionic equation.

A chemical equation known as an ionic equation expresses the electrolytes in aqueous solution as dissociated ions.

A chemical equation known as the net ionic equation shows how ions or molecules change throughout a process.

Net ionic equations lack the common ions that exist on both sides of the ionic equation and are known as spectator ions. In a reaction, ions that do not change at all are known as spectator ions.

Molecular equation:

\(2K_3PO_4 (aq) + 3Cu(CH_3COO)_2 (aq) \rightarrow 6K(CH_3COO) (aq) + Cu_3(PO_4)_2 (s)\)

Ionic equation:

\(6K^+ (aq) + 2PO_4^{3-} (aq) + 3Cu^{2+} (aq) + 6CH_3COO^- (aq) \rightarrow 6K^+ (aq) + 6CH_3COO^- (aq) + Cu_3(PO_4)_2 (s)\)

Net Ionic equation:

\(3Cu^{2+} (aq) + 2PO_4^{3-} (aq) \rightarrow Cu_3(PO_4)_2 (s)\)

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Yes. Stars use fusion to create nuclear energy, which is what makes them "alive". The older they are, the "bigger" the element in them is. Hydrogen turns into Helium, and when hydrogen is used up, the helium starts fusing into bigger elements. it stops at iron however. Once stars start fusing silicon to iron, it is doomed because it takes more energy than it gives off.

It will take approximately 72.9 years (to the nearest tenth of a year) for the trichloroethene  (TCE) concentration to degrade down to the MCL of 5 μg/L.

To calculate the time it will take for TCE to degrade down to the MCL (Maximum Contaminant Level) concentration of 5 μg/L, we can use the concept of "first-order decay" for the degradation process. The formula for first-order decay is:

C(t) = C0 * e^(-kt)

where:

C(t) = concentration at time t

C0 = initial concentration (120 kg/L)

e = base of the natural logarithm (approximately 2.71828)

k = first-order decay rate constant

t = time

The half-life (t1/2) of TCE is given as 24 months, which means that the concentration will decrease to half its initial value in 24 months. The half-life is related to the first-order decay rate constant (k) as follows:

t1/2 = ln(2) / k

Solving for k:

k = ln(2) / t1/2

k = ln(2) / 24 months

Now, we can calculate the time (t) it will take for the concentration to reach 5 μg/L (MCL):

5 μg/L = 120 kg/L * e^(-kt)

t = ln(5 μg/L / 120 kg/L) / -k

t = ln(5e-6 / 120) / - (ln(2) / 24)

t ≈ 72.9 years

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Answer:

Arcuate: A fan-shaped delta, bowed or curved.

Cuspate: V-shaped delta.

Bird-foot: Outstretched claws delta

Inverted: The narrow end of delta, or river delta.

Waves: Large or regular shaped waves delta.

Tires: Round shaped delta

River estuary: A landform deposited by sediment

Explanation:

1. d.4.125 x 10²⁴ atoms

2. c. 487.73 g

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

1. 7 moles of phosphorus, so n=7, then number of atoms :

\(\tt N=7\times 6.02\times 10^{23}\\\\N=4.215\times 10^{24}\)

2. 2.5 moles of Pt, so n=2.5, the mass of Pt(MW=195,084 g/mol) :

\(\tt mass=mol\times MW\\\\mass=2.5\times 195,084\\\\mass=487.73~g\)

In a decomposition reaction the one compound is broken down into more atoms.

A decomposition reaction is a type of reaction in which one compound breaks down into two or more elements. This can be represented by the general equation: AB → A + B. The examples of decomposition reactions is the breakdown of hydrogen peroxide into water and oxygen atoms and the breakdown of water into hydrogen and oxygen atoms. There are three types of decomposition reaction i.e. Thermal Decomposition Reaction, Electrolytic Decomposition Reaction and Photo Decomposition Reaction.

So we can conclude that In a decomposition reaction the one compound is broken down into more atoms.

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The collisions between gas particles can either be elastic or inelastic, depending on the nature of the gas and the conditions of the collision.

Elastic collisions occur when the total kinetic energy of the colliding particles remains constant before and after the collision. In contrast, inelastic collisions result in a transfer of kinetic energy from one particle to another, leading to a change in the total kinetic energy of the system. Among the gases listed, only the noble gas He exhibits completely elastic collisions under all conditions. This is due to its simple atomic structure, which allows it to retain its kinetic energy in collisions without undergoing chemical reactions or energy transfers.
E) All gases the same

Collisions between gas particles are generally considered elastic, meaning that the total kinetic energy of the particles involved is conserved before and after the collision. This assumption holds true for all ideal gases, including He, Cl2, CH4, and NH3. In reality, gases may deviate from ideal behavior, but for most practical purposes and calculations, we can assume that collisions are elastic for all of the gases mentioned.

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There are approximately 0.019675 moles of NaOH present in 25.0 mL of a 0.787 M NaOH solution.

To determine the number of moles of NaOH present in 25.0 mL of a 0.787 M NaOH solution, you can follow these steps:

1. Convert the volume of the solution from milliliters (mL) to liters (L). There are 1,000 mL in 1 L, so divide the volume by 1,000:
  25.0 mL ÷ 1,000 = 0.025 L

2. Use the given molarity of the NaOH solution, which is 0.787 moles of NaOH per liter (M):
  0.787 moles/L

3. Multiply the volume in liters (0.025 L) by the molarity (0.787 moles/L) to find the number of moles of NaOH:
  0.025 L × 0.787 moles/L = 0.019675 moles

So, there are approximately 0.019675 moles of NaOH present in 25.0 mL of a 0.787 M NaOH solution.

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The average tire pressure for an automobile is 38.5 psi which is how many atmospheres of pressure is 2.62 atm. The correct answer is option c) 2.62 atm.

To convert the average tire pressure of an automobile, 38.5 psi, to atmospheres of pressure, we can use the following conversion factor: 1 atm = 14.696 psi.

Here is a step-by-step explanation:

1. Write down the given pressure in psi: 38.5 psi
2. Identify the conversion factor: 1 atm = 14.696 psi
3. Set up a proportion to find the pressure in atmospheres: (38.5 psi) * (1 atm / 14.696 psi)
4. Cancel the units (psi) and perform the calculation: (38.5) * (1 / 14.696)
5. Calculate the result: 2.62 atm

So, the average tire pressure of 38.5 psi is equivalent to 2.62 atmospheres of pressure, which corresponds to option c) 2.62 atm.

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Answer:

106.119 calories

Explanation:

Hope this helps! If you need a step-by-step explanation feel free to ask and I'd be happy to give it to you <33

A 25.0 g sample of metal is warmed at 6.1 °C using 259 of energy. The specific heat of the metal is 1.07 J/g°C.

Given:

m = 25.0 g

ΔT = 6.1 °C

q = 259 J

The specific heat of the metal is given by the formula:

q = mcΔT

where q is the amount of heat energy absorbed by the metal, m is the mass of the metal, c is the specific heat of the metal, and ΔT is the change in temperature.

Rearranging the formula:

c = q / (m ΔT)

Substituting the given values:

c = 259 J / (25.0 g × 6.1 °C)

c = 1.07 J/g°C

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Answer:

The correct answer is 1.69

Acellus

Explanation:

According to the question the enthalpy change per mole of LiCI: 7.38 kJ/mol

Enthalpy is a thermodynamic property that measures the total energy of a system. It is the sum of the internal energy of a system plus the product of its pressure and volume. It is an extensive property, meaning that its value is proportional to the size of the system. Enthalpy is often used to calculate the energy changes that occur in physical or chemical processes, such as heat transfer or chemical reactions. For example, enthalpy can be used to measure the energy released or absorbed during a reaction, or to determine the efficiency of a heat engine. Enthalpy can be expressed in terms of energy units such as joules, calories, or kilojoules.

The enthalpy change per mole of LiCI can be calculated using the following equation:
ΔH = (mass of solution x specific heat x ΔT) / (moles of LiCI)
Where ΔT is the change in temperature.
Plugging in the given values, we get:
ΔH = (60.0 g x 4.184 J/g°C x 3.3°C) / (0.0150 g/mol)
ΔH = 7.38 kJ/mol.

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The specific heat of gold is approximately 0.129 J/g°C. This means that it takes 0.129 joules of energy to raise the temperature of 1 gram of gold by 1 degree Celsius.

To find the specific heat of gold, we can use the formula:

Q = m * c * ΔT

Where:

Q = Heat energy (in joules)

m = Mass of the object (in grams)

c = Specific heat capacity (in J/g°C)

ΔT = Change in temperature (in °C)

Given:

Mass of the bracelet (m) = 38.0 grams

Heat energy released (Q) = 460.8 joules

Change in temperature (ΔT) = 94.0°C

Rearranging the formula, we can solve for the specific heat capacity (c):

c = Q / (m * ΔT)

Substituting the given values:

c = 460.8 J / (38.0 g * 94.0°C)

c = 460.8 J / (3572 g°C)

c ≈ 0.129 J/g°C

Therefore, the specific heat of gold is approximately 0.129 J/g°C. This means that it takes 0.129 joules of energy to raise the temperature of 1 gram of gold by 1 degree Celsius.

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Answer:

Potable water, also known as drinking water, comes from surface and ground sources and is treated to levels that that meet state and federal standards for consumption.

HI.3H2O. This is the answer

Answer: Hello, There your Answer is Below.

A. Eugene was a little colder than Portland because Eugene is a little closer to the coast.

Explanation:

Hope this Helps you!!

Have a great day!!!

Answer:

D! :)

Explanation:

Answer:

a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.

Hope this helped!!!

Answer:

Empirical formulas show the simplest whole-number ratio of atoms in a compound

Explanation:

The solubility of magnesium hydroxide (Mg(OH)2) is given as 1.01 x 10^-4 M. This means that at equilibrium, the concentration of Mg2+ ion is also        

solve this problem, we need to write the balanced chemical equation for the reaction between sodium formate and hydrochloric acid:

HCO2Na (aq) + HCl (aq) → HCO2H (aq) + NaCl (aq)

From the balanced chemical equation, we can see that sodium formate (HCO2Na) reacts with hydrochloric acid (HCl) to form formic acid (HCO2H) and sodium chloride (NaCl).

First, let's calculate the number of moles of sodium formate and hydrochloric acid used:

moles of NaCO2H = (0.200 mol/L) x (0.100 L) = 0.020 mol

moles of HCl = (0.077 mol/L) x (0.100 L) = 0.0077 mol

Next, we need to determine which reactant is limiting. The limiting reactant is the one that is completely consumed in the reaction and determines the amount of product that can be formed. To do this, we compare the number of moles of each reactant to the stoichiometric coefficients in the balanced chemical equation:

From the balanced chemical equation, 1 mole of NaCO2H reacts with 1 mole of HCl to form 1 mole of HCO2H.

Since the number of moles of HCl is less than the number of moles of NaCO₂H, HCl is the limiting reactant.

To calculate the concentration of the resulting solution of formic acid, we need to determine the number of moles of HCO₂H that are produced. From the balanced chemical equation, we know that 1 mole of HCO2H is produced for every mole of HCl used. Therefore:

moles of HCO2H = 0.0077 mol

The total volume of the resulting solution is 200.0 mL (100.0 mL + 100.0 mL). Therefore, the concentration of formic acid in the resulting solution is:

[HCO₂H] = moles of HCO₂H / total volume of solution = 0.0077 mol / 0.200 L = 0.0385 M

To calculate the pH of the resulting solution, we need to use the Ka expression for formic acid:

Ka = [H+][HCO₂⁻] / [HCO2H]

We can assume that the initial concentration of formate ion (HCO₂⁻) is negligible compared to the initial concentration of formic acid (HCO₂H). Therefore, we can simplify the expression as follows:

Ka = [H+][HCO₂⁻] / [HCO₂H] ≈ [H⁺]^2 / [HCO₂H]

Rearranging the equation, we get:

[H⁺] = sqrt(Ka x [HCO₂H]) = sqrt(1.8E-4 x 0.0385) = 0.00757

Therefore, the pH of the resulting solution is:

pH = -log[H+] = -log(0.00757) = 2.12

Thus, the pH of the solution is approximately 2.12 (value ± 0.02).

Now, let's move on to the second part of the question.

The solubility product expression for magnesium hydroxide (Mg(OH)₂) is:

Ksp = [Mg₂⁺][OH⁻]^2

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The final state of the methane once the system equilibrates is T = 458.53K

Total heat added, Q-42 kJ

mass of methane, m = 32 g

Initial temperature 170 °C=103 K

boiling point = - 161.5 °C=111.5 K

Heat required to raise the temperature upto boiling point,

q1 =m x cp x delta T

     =32 x 3.48 x (111.5-103)

      =946.56 J

      = 0.94656 kJ

moles of methane = mass of methane/molar mass of methane =32g/16g/mol

=2moles

Heat required to change it to vapour form,

q2 = 2x = x delta H vap

    = 2 x 8.20

    = 16.4 kJ

Let the final temperature be T

Heat required to raise the temperature from 111.5 K to T,

q3= m x cp x delta T

    =32 x 2.22 x (T-111.5)

     = 0.07104 × (T-111.5)

Total heat added = q₁ +q2+q3

42= 0.94656 kJ + 16.4 kJ + 0.07104 × (T-111.5)

42=17.34656kJ+ 0.07104 × (T-111.5)

24.65344 = 0.07104 × (T-111.5)

347.03 T-111.5

T= 458,53 K

Hence, the final state of the methane once the system equilibrates is T = 458.53K

What do you know about methane?

Methane, dreary, scentless gas that happens bounteously in nature and as a result of specific human exercises. Methane is the least complex individual from the paraffin series of hydrocarbons and is among the most intense of the ozone depleting substances. Its synthetic recipe is CH4.

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Answer:

Bacteria, Archaea and Eukarya are the three domains of life.

Answer:

Chromate Chemical Formula

Explanation:

The formula of chromate is CrO42-. The chromate ion usually consists of one chromium atom (+6 oxidation state) and four oxide atoms. The overall charge is -2.

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Different hormones responsible for different emotions have different structures. Hormones are responsible for regulating different emotional states in humans, including love, fear, stress, and anxiety. Hormones have different structures that determine their function in the body. For example, cortisol has a more complex structure than adrenaline and noradrenaline, and it is responsible for controlling the body's stress response system.

Hormones are the chemicals produced by different glands in the body, including the pituitary gland, adrenal gland, and hypothalamus, among others. Hormones are responsible for various emotions, including love, stress, fear, and anxiety, among others. In this sense, hormones are critical in regulating the emotional state of individuals. Hormones, however, have different structures, depending on the type of hormone. The structures are essential in the determination of the hormone's function in the body, including the emotions they elicit.
The different hormones responsible for different emotions have different structures. For example, adrenaline and noradrenaline have similar structures and are responsible for eliciting the fight or flight response in humans. Adrenaline and noradrenaline are both produced by the adrenal gland. Another hormone that is responsible for stress is cortisol, produced by the adrenal gland. Cortisol has a more complex structure than adrenaline and noradrenaline and is responsible for controlling the body's stress response system.
The hormone oxytocin is responsible for love and social bonding. Oxytocin is produced in the hypothalamus and released into the bloodstream. It has a peptide structure and is responsible for eliciting the feeling of love and social bonding. The hormone dopamine, on the other hand, is responsible for the feeling of pleasure and reward. Dopamine is produced in the brain, and it has a similar structure to adrenaline and noradrenaline.

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Answer:

The atoms of chlorine are held together by non-polar covalent bonds. Covalent bonds are formed between two or more atoms having zero or very small electronegativity difference. For homonuclear molecules where the two bonding atom are of the same kind, the electronegativity difference is zero.

C. Atoms of chlorine (CI)

A covalent bond is created when the electrons from the two involved atoms are shared equally.The pair of electrons involved in this kind of bonding is referred to as the shared pair or bonding pair. Here the atoms of chlorine have non-polar covalent bonds. The correct option is C.

A non-polar covalent connection is created when atoms with an equal amount of electrons share one another. The electronegativity of the two atoms is equivalent. When two atoms with similar electron affinities join together, like in the case of diatomic elements, it happens.

Non-polar covalent compounds are those in which there is no variation in electronegativity. In these compounds, the electronegativity does not change, preventing the motion of the bond pair's electrons in the direction of the linked atoms.

As a result, a molecule is non-polar and non-conducting since there is no bond or dipole moment between its atoms and no buildup of charges on the atoms.

Thus the correct option is C.

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Answer:

50?

I think but not 100% sure if not lmk

NH3 has 1 Nitrogen atom and 3 hydrogen atoms.

Answer:

I believe not.

Explanation:

From what I have been told atoms can never come into contact beyond the electron barrier.

Answer:

190

Explanation:

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

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

A covalent bond will be formed between two chlorine atoms.

Chlorine, represented by the symbol "Cl" is present in the 17th group and third period of the periodic table, having atomic number 17. It has 17 electrons, 17 protons and 18 neutrons. It belongs to the halogen family with seven valence electrons. The other elements of this group are Fluorine(F), Bromine(Br) and Iodine(I).

The elements of this group has the tendency to gain one electron in its outermost shell in order to attain stability of the nearest noble gas configuration.

The electronic configuration of chlorine is 2,8,7 . So, two chlorine atoms will share their valence electrons to complete their octet . The bond formed by sharing of electrons is known as a covalent bond. It is a strong bond formed when two atoms of the same element combine together.

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