how much au will be plated out (from a solution containing au3 ) by the same amount of current that plates 10.5 g of cu (from a solution of cu2 )

Answer:

20 grams.

Explanation:

5 mols of a compound has a mass of 100 grams

1 mol of the same compound has a mass of 100/5 = 20 grams

Answer:

Xe that is xenon

Explanation:

Xe that is xenon

Answer:

chemical reaction between two reagents basically

Answer:

Law of multiple proportions

Explanation:

The law which is illustrated with the data suggests the law of multiple proportion.

The combining elements are carbon and hydrogen;

Law of multiple proportions states that "if two element combine together to form tow or more different compounds, the masses of one of the elements which separately combine with a fixed mass of the other element are in a simple ratio".

 Let us prove the law of multiple proportion:

In A;

       C = 75%     H = 25%  =  3:1

   B;

        C = 85.7     H =14.3   = 6:1

  C;

         C = 92.3    H = 7.7    = 12:1

We see that both carbon and hydrogen have a fixed ratio.

Answer:

The correct answer is b) 4.17 g of sodium and 6.42 g of chlorine

Explanation:

According to the law of definite proportions a chemical compound is composed always by the same elements in the same proportions by mass. In this case, the proportion of the elements by mass will be 4.37 g of chlorine (Cl) per 2.84 g of sodium (Na):

4.37 Cl/2.84 g Na= 1.54

We can calculate the proportions of the results in order to see which is the correct:

a) 3.75 g Cl/4.17 g Na = 0.899

b) 6.42 g Cl/4.17 g Na = 1.539 ⇒ ≅1.54

c) 1.05 g Cl/4.17 g Na = 3.971

d) 12.1 g Cl/4.17 g Na = 2.901

The option in which the proportion Cl/Na is equal to 1.54 is option b

Answer:

0.393701

Explanation:

Answer:

protein sysnthesis

Explanation:

Answer:

300.02°F

Explanation:

To convert 421.9.9 Kelvin to Celsius subtract 273 from 421.9 Kelvin

421.9-273=148.9°C

To convert 148.9°C to °F use the formula (°C x 9/5) +32

That is:

(148.9°C x 9/5) + 32

=300.02°C

The boiling point of the 1.52 M CaCl2 solution assuming 100% dissociation is raised by approximately 0.130 °C.

To calculate the freezing point depression (ΔTf) and boiling point elevation (ΔTb) of a solution of 1.52 M CaCl2 assuming 100% dissociation, we need to use the colligative properties equations and the colligative constants.

For the freezing point depression, the equation is:

ΔTf = Kf * m

where Kf is the freezing point depression constant and m is the molality of the solution.

For calcium chloride (CaCl2), the value of Kf is 3.74 °C/m.

To calculate the molality (m), we need to convert the given concentration from molarity (M) to molality (m). Since CaCl2 dissociates into three ions (Ca2+ and 2 Cl-) when dissolved, the effective concentration of particles is 1.52 M * 3 = 4.56 mol/L.

To convert molality (m) to mol/kg, we need to divide the concentration by the solvent's molar mass. For water (H2O), the molar mass is approximately 18.015 g/mol.

m = (4.56 mol/L) / (18.015 g/mol * 1 kg/1000 g) ≈ 0.2538 mol/kg

Substituting the values into the freezing point depression equation:

ΔTf = (3.74 °C/m) * (0.2538 mol/kg) ≈ 0.949 °C

Therefore, the freezing point of the 1.52 M CaCl2 solution assuming 100% dissociation is lowered by approximately 0.949 °C.

For the boiling point elevation, the equation is:

ΔTb = Kb * m

where Kb is the boiling point elevation constant. For water, the value of Kb is 0.512 °C/m.

Substituting the molality value into the boiling point elevation equation:

ΔTb = (0.512 °C/m) * (0.2538 mol/kg) ≈ 0.130 °C

Therefore, the boiling point of the 1.52 M CaCl2 solution assuming 100% dissociation is raised by approximately 0.130 °C.

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The height of a ramp does not directly determine the strength of the frictional force between a book and an object.

The strength of the frictional force between a book and an object is not directly influenced by the height of a ramp. The nature of the surfaces in contact, the force forcing the surfaces together (normal force), and the coefficient of friction are some of the variables that affect the frictional force between two surfaces.

The coefficient of friction between the book and the object plays a major role in determining the strength of the frictional force.

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Answer:

32.0 is the answer which is divide able to 65 or -85

When a liquid changes to a gas, the molecules in the room gain enough energy to break the bonds that hold them together in the liquid state.

What are Molecules?

Molecules are the smallest unit of matter that still has the properties of a particular substance. They are made up of two or more atoms that are bonded together. Molecules can be covalent, meaning the atoms in the molecule share electrons, or ionic, meaning one atom has donated electrons to the other.

This energy comes from an increase in temperature, which causes the molecules to move faster and farther apart. As the molecules move around and expand, they fill the room with a vapor or gas.

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Answer:

The rollercoaster has the lowest kinetic energy at the top of the hill.

The rollercaoster has the highest kinetic energy at the bottom of the hill.

Explanation:

The kinetic energy of any solid body in motion is usually computed using this formula:

K.E = \(\frac{1}{2}mv^2\)

From this, we can see that it varies based on two major parameters - The mass of the moving object and the velocity of the moving object.

We can assume that the mass of the rollercoaster is constant since no one gets off and it does not shrink in its size during the ride.

This means that the variations in the K.E are mainly coming from its velocity.

At the top of the hill, the rollercoaster is moving at its slowest pace. hence, it has the lowest kinetic energy at the top of the hill.

However, at the bottom of the hill, the rollercoaster is moving its fastest, hence it has the highest kinetic energy at the bottom of the hill.

At 78°C is the temperature at which water boil at an atmospheric pressure of 55Kpa.

The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points or thermometric substances.

The most popular scales include the Celsius scale, sometimes known as centigrade, with the unit symbol °C, the scale of Fahrenheit (°F), or the Kelvin scale (K), with the latter being mostly used for scientific purposes. One of the Worldwide System of Units' (SI) seven base units is the kelvin. At 78°C is the temperature at which water boil at an atmospheric pressure of 55Kpa.

Therefore, at 78°C is the temperature at which water boil at an atmospheric pressure of 55Kpa.

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Answer:

Explanation:

Here, we want to get the change in the internal energy of the system

Mathematically, according to the 1st law of thermodynamics, we have it that:

where:

Q = 2,500 J

W = +7,655 J

W is positive since work is done by the system

Substituting the values into the equation above, we have it that:

The most probable substance that trinity tested is an alkali.

How do you pass a litmus test?

To test at least nine different compounds, cut each piece of litmus paper into three smaller pieces. Take one tiny piece of red litmus paper. Dip it into a sample of the chemical being tested. Put each observation in a proper table. Then put the litmus paper scraps in the trash can.

When the pH is below 4.5 and above 8.3, the litmus paper becomes red. When the paper turns purple, the pH level is almost neutral. If the red paper doesn't change color, the sample is an acid. If the color of the blue paper does not change, the sample serves as a base.

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Answer:A, The Period Number

Explanation:

just took the test

Answer: yes

Explanation: Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors.

Answer:

i belive its c

Explanation:

The structure of the alkene formed in this reaction is  \(CH_{3}CH=CHCOCH_{3}\) .

The structure of the alkene formed in the reaction when \(CH_{3}CH_{2}I\) reacts with triphenyl phosphine, followed by n-butyl lithium, followed by acetone is as follows:

Step 1: \(CH_{3}CH_{2}I\)  reacts with triphenyl phosphine ( \(PPh_{3}\) ) to form a phosphonium ylide through a substitution reaction.
\(CH_{3}CH_{2}I\)  + \(PPh_{3}\) → (\(CH_{3}CH_{2}\)) \(PPh_{3}\) + I-

Step 2: The phosphonium ylide reacts with n-butyl lithium (n-BuLi), which acts as a strong base, to form a carbanion.
(\(CH_{3}CH_{2}\)) \(PPh_{3}\) + I- + n-BuLi → [(\(CH_{2}=CH\)) \(PPh_{3}\) ]+ LiI

Step 3: The carbanion then reacts with acetone through a Wittig reaction, forming an alkene as the product.
[(CH2=CH) \(PPh_{3}\) ]+ LiI +\(CH_{3}COCH_{3}\) → \(CH_{3}CH=CHCOCH_{3}\) + ( \(PPh_{3}\) )LiI

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Develop bioluminescence would you be more likely to find in the jellyfish that lives in the deeper waters of the ocean.

Light generated by a chemical reaction inside a living thing is known as bioluminescence. A type of chemiluminescence known as bioluminescence is simply a chemical process that results in the production of light.

A "cold light" is what bioluminescence is. Less than 20% of a light's energy is used to produce thermal radiation, or heat.

The ocean is the most common habitat for bioluminescent creatures. Fish, bacteria, and jellies are among the marine creatures that glow bioluminescent. Fireflies and fungus are two examples of the bioluminescent creatures that can be found on land.

Therefore, Develop bioluminescence would you be more likely to find in the jellyfish that lives in the deeper waters of the ocean.

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Answer:

Distance cover = 8 km

Explanation:

Given:

Speed of runner = 4 km/h

Time taken = 2 hour

Find:

Distance cover

Computation:

Distance = Speed x Time

Distance cover = Speed of runner x Time taken

Distance cover = 4 x 2

Distance cover = 8 km

Answer:

d = 0.6975 g/cm³

Explanation:

d = m/V       d = density      m = mass      V = volume

1 mL = 1 cubic centimeter

d = 2640 g / 3785 cm³

d = 0.6974900925 g/cm³

four significant digits in problem, so four significant digits in answer

\(\\ \rm\rightarrowtail Density=\dfrac{Mass}{Volume}\)

\(\\ \rm\rightarrowtail Density=\dfrac{2640}{3785}\)

\(\\ \rm\rightarrowtail Density=0.697g/mL\)

Answer:

Its contaminated

Explanation:

The answer is no, a pi bond cannot exist independently of a sigma bond.

Sigma bonds are chemical bonds formed by the linear overlapping of the atomic orbitals while the pi bonds have a head-to-head overlap of atomic orbitals.

In molecular bonding, a pi bond always occurs together with a sigma bond, and it is formed due to the parallel overlap of p orbitals in adjacent atoms. The sigma bond, on the other hand, is formed due to the direct overlap of atomic orbitals, such as s or p orbitals, and it always occurs before the formation of a pi bond. In summary, a pi bond is always accompanied by a sigma bond, and it cannot exist independently.

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            Precipitate definition (Entry 2 of 3) 1: a substance that has been physically or chemically isolated from a solution or suspension, typically in the form of an insoluble crystalline or amorphous solid. 2: a byproduct, outcome, or result of a procedure or action. adjective. precipitate.

Precipitation Illustration

        Silver chloride will solidify out of solution when silver nitrate and sodium chloride are combined in water. Silver chloride is the precipitate in this instance.

       Solids are created by the process of precipitation after two chemicals react. The downword () arrow symbol is used to represent the production of precipitate in this type of reaction.

      It happens between the reactant ions in the aqueous solutions that give rise to the material. Complete response: Precipitation includes the following: snow, sleet, hail, and rain.

       An excess of the light blue precipitate dissolves to create an inky transparent solution. A little amount of sodium hydroxide solution and subsequently an excessive amount are added to solution W. There develops an insoluble white precipitate.

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Answer:

1. It is a covalent bond and all covalent bonds have low melting points

Explanation:

The 250.0-g iron ball gained 1462.5 Joules of heat when its temperature increased from 19.0°C to 32.0°C.

In order to calculate the heat gained by the iron ball, we'll use the formula:

q = mcΔT

where q represents the heat gained, m is the mass of the iron ball, c is the specific heat of iron, and ΔT is the change in temperature.

Given the information in your question:
m = 250.0 g
ΔT = 32.0°C - 19.0°C = 13.0°C
c = 0.45 J/g°C

Now, we can plug these values into the formula:

q = (250.0 g) × (0.45 J/g°C) × (13.0°C)

By calculating the product of these values, we find:

q = 1462.5 J

Therefore, the 250.0-g iron ball gained 1462.5 Joules of heat when its temperature increased from 19.0°C to 32.0°C.

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The relative probability of a CO2 molecule having three times the average kinetic energy (3eavg) compared to one having the average kinetic energy (eavg) is low.

The average kinetic energy of a gas molecule is directly proportional to its temperature. In the case of carbon dioxide (CO2), the average kinetic energy of its molecules at a given temperature determines their speed and motion.

Assuming a temperature remains constant, the probability of a CO2 molecule having three times the average kinetic energy (3eavg) compared to having the average kinetic energy (eavg) is relatively low.

At a given temperature, the distribution of kinetic energies among a group of gas molecules follows the Maxwell-Boltzmann distribution. This distribution describes the probability of finding a molecule with a specific kinetic energy.

The distribution is skewed towards lower energies, with fewer molecules having higher energies. Since the relative probability of a molecule having three times the average kinetic energy is significantly lower, it suggests that very few CO2 molecules within a sample would possess such high energies.

The relative probability can be understood by considering the shape of the Maxwell-Boltzmann distribution curve. The curve has a peak at the average kinetic energy (eavg) and tapers off towards higher energies. As we move further away from the peak (eavg), the number of molecules possessing those higher energies decreases rapidly.

Therefore, the likelihood of a CO2 molecule having three times the average kinetic energy (3eavg) compared to eavg is relatively low, indicating that it is an infrequent occurrence.

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