Which statement is not correct?

a. A voltaic cell is a type of electrochemical cell.
b. An electrochemical cell can extract electrical energy from a reactant-favored chemical reaction.
c. Reduction occurs at the cathode in an electrochemical cell.
d. A battery is an example of an electrochemical cell.
e. All electrochemical cells have at least two electrodes.

The new rate of the modified reaction will be 44mmmM/s which can be calculated by the rate of disappearance.

For this response, the rate of disappearance was calculated. The concentration will drop as it is consumed. After 54 minutes, the concentration dropped to 1.58 molar.

What is the reaction's speed?

Units are a way to express the reaction rate. HCl is characterized by a change in polarity of the compound per unit of time or per change in time. We have 1.85 Molar moving to 1.58 Molar in 54 minutes. Ten times as much negative three molar HCl would be produced each minute. People should subtract the initial polarity from the end one to do it correctly.

Because of the drug's concentration, we experience a negative rate of reaction. The fact that the rate is negative indicates that we are consuming.

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Answer:

because it does not cost much and can be found easily.  due to their low resistance and excellent conductivity.

Explanation:

Answer:

Yes

Explanation:

Everything is made up of atoms!

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Answer:

Lithium

Explanation:

The element with electronic configuration of 2, 1 is helium.

In the electronic configuration, we are able to know that the total number of electrons the atom contains is 3. Also, the element has one electron in the outer most shell.

Elements with one valence electrons are the alkali metals.

Therefore, this configuration clearly matches Lithium.

The heat is required to raise the temperature of the copper to its melting point is  7.7 × 10⁸J. The correct answer is C.

To calculate the heat required to raise the temperature of the copper to its melting point, we can use the formula:

Q = m * c * ΔT

where Q is the heat, m is the mass of the copper, c is the specific heat of copper, and ΔT is the change in temperature.

Mass of copper (m) = 1500 kg

Specific heat of copper (c) = 385 J/kg • K

Change in temperature (ΔT) = Melting point temperature - Initial temperature

= 1083°C - 15°C

= 1068°C

Now, let's calculate the heat required:

Q = m * c * ΔT

= 1500 kg * 385 J/kg • K * 1068°C

Make sure to convert the temperature from Celsius to Kelvin by adding 273.15:

Q = 1500 kg * 385 J/kg • K * (1068 + 273.15) K = 7.7 × 10⁸J.

The correct answer is C.

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Answer:

See below

Explanation:

propane mole weight = 44 gm / mole

100 gm / 44 gm / mole = 2.27 moles

From the equation, 5 times as many moles of OXYGEN (O2)are required

   = 11.36 moles of oxygen

           at STP this is 254.55  liters of O2 (because 22.4 L = one mole) and

Using oxygen as 21 percent of air means that

      .21 x = 254.55 =       x = 1212.12 liters of air required

Answer:

A. Which months are the most popular for students to have birthdays?

Hope you could understand.

If you have any query, feel free to ask.

Answer:

Yes.

Explanation:

Answer:

=0=0==00=0=0=

Explanation:

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The partial pressure of O2 in the mixture is 446 Torr.

To find the partial pressure of O2 in a mixture, we need to use the mole fraction of O2 and the total pressure of the mixture.

The mole fraction of O2 (XO2) is the ratio of the moles of O2 to the total moles of gas in the mixture:

XO2 = moles of O2 / total moles of gas

We can find the moles of O2 by dividing the mass of O2 by its molar mass:

moles of O2 = mass of O2 / molar mass of O2

Similarly, we can find the moles of He in the mixture by dividing the mass of He by its molar mass:

moles of He = mass of He / molar mass of He

The total moles of gas in the mixture is the sum of the moles of O2 and He:

total moles of gas = moles of O2 + moles of He

Now we can find the mole fraction of O2:

XO2 = moles of O2 / total moles of gas

We are given that the mixture is 92.3% by mass O2, which means that 7.7% of the mass is due to He.

Therefore, we can assume that we have 100 g of the mixture, of which 92.3 g is O2 and 7.7 g is He.

The molar mass of O2 is 32 g/mol and the molar mass of He is 4 g/mol. Using these values, we can calculate the moles of O2 and He in the mixture:

moles of O2 = 92.3 g / 32 g/mol = 2.884 mol

moles of He = 7.7 g / 4 g/mol = 1.925 mol

The total moles of gas in the mixture is:

total moles of gas = moles of O2 + moles of He = 2.884 mol + 1.925 mol = 4.809 mol

Now we can find the mole fraction of O2:

XO2 = moles of O2 / total moles of gas = 2.884 mol / 4.809 mol = 0.5999

The partial pressure of O2 can be found by multiplying the mole fraction of O2 by the total pressure of the mixture:

partial pressure of O2 = XO2 * total pressure = 0.5999 * 745 Torr = 446 Torr

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Answer:

Explanation:

Here, we want to get which of the compounds have the highest percentage by mass of nitrogen

What we have to do here is to divide the mass of nitrogen atoms in the compound by the molecular mass of the compound

a) NH3

The atomic mass of nitrogen is 14 amu, the atomic mass of hydrogen is 1 amu

The molar mass is thus 14 + 3(1) = 17 g/mol

The percentage by mass of nitrogen will be

14/17 * 100 = 82.35 %

b) HCN

The atomic mass of carbon is 12 amu

Thus, we have the molar mass as

1 + 12 + 14 = 27 g/mol

Percentage of nitrogen by mass will be : 14/27 * 100 = 51.85 %

c) For N2O

The atomic mass of oxygen is 16 amu

The molar mass of the compound will be 14(2) + 16 = 44 g/mol

Percentage of nitrogen by mass will be = 28/44 * 100 = 63.64 %

d) NI3

The atomic mass of iodine is 127 g/mol

So the molar mass of the compound will be:

14 + 3(127) = 395 g/mol

Percentage by mass of nutrogen will be

14/395 * 100 = 3.54 %

From what we have, the highest percentage by mass of nitrogen is 82.35 % and that belongs to ammonia (NH3)

Answer:

neutral, acidic, basic

Explanation:

Know the acidity rules. Sorry I just saw this!

- Hope that helps! Please let me know if you need further explanation.

Microphone are used for recording voice. A microphone will likely detect the least amount of sound when placed in cardboard box. Therefore, option A is correct.

Microphone for recording voice. Users have the choice of using speech recognition. Users can record the sounds of musical instruments using this.

Different processes are used by the three main categories of microphones dynamic, condenser, and ribbon to transform sound into electrical signals. But the fundamental design of all three is the same.

Thus, option A is correct.

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Ivan Pavlov is most known for demonstrating conditioned lreflex in dogs.

Conditioned reflex is a reflex action which has been conditioned to occur even without the stimulus which produces the reflex.

Ivan Pavlov is known to demonstrate conditioned reflex in dogs.

In his experiment, he trained dogs to salivate at the sound of a bell even if food which is the stimulus that produces salvation was not present.

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Answer:

A conditioned reflex is a reflex action that has been trained to occur even when the stimulus that causes the reflex is not present.

Ivan Pavlov is recognized for using dogs to illustrate conditioned reflexes.

He trained dogs to salivate at the sound of a bell even when food, the stimulus that induces salvation, was not present in his experiment.

Explanation:

Answer:

The amount of work a system can do is limited by the changes in entropy that occur and cause energy to be dissipated as heat. Systems that dissipate less energy as heat will be able to do more work than systems that dissipate more energy as heat.

Explanation:

The amount of work a system can do is limited by the changes in entropy that occur and cause energy to be dissipated as heat.

Entropy is also a measure of the number of possible arrangements the atoms in a system can have. In this sense, entropy is a measure of uncertainty or randomness.

The amount of work a system can do is limited by the changes in entropy that occur and cause energy to be dissipated as heat.

Systems that dissipate less energy as heat will be able to do more work than systems that dissipate more energy as heat.

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49.8 g mass of c12h22o11 (sucrose) is needed to prepare 255 ml of a 0.570 m solution of sucrose in water

Volume of sucrose Solution in water = 0.570

volume of water = 255

Therefore mass of sucrose to prepare 255 ml of 0.570 m solution of sucrose in water = (255)(1/1000)(0.570)(342.29)= 49.8g

Sucrose solutions can be prepared by mixing one packet of sugar with 10 ml of water. Sucrose is not as effective as local anesthetics, however, and is optimally used in combination with local anesthetics. 24% sucrose is not a medicine; it is another name for sugar water. Sucrose is c onsidered a food product, and does not require a prescription.Oral sucrose is a mild analgesic and should only be used clinically for the reduction of pain during minor procedures. The mechanism is an orally mediated increase in endogenous opioid. The analgesic effect lasts 5-8 minutes making it an ideal strategy for the management of short term pain.

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Answer:

overflow the top edge of the filter paper

Answer:



Explanation:

a) To calculate the concentration of NaCl, we first need to convert the volume from cm³ to liters:

200 cm³ = 0.2 L

Then we can use the formula:

concentration (in moles per liter) = moles of solute / volume of solution (in liters)

concentration = 0.1 moles / 0.2 L = 0.5 moles per liter

Therefore, the concentration of NaCl is 0.5 M.

b) We can use the same formula as in part (a):

concentration = moles of solute / volume of solution (in liters)

concentration = 0.2 moles / 0.1 L = 2 moles per liter

Therefore, the concentration of H₂SO4 is 2 M.

c) Again, we use the same formula:

concentration = moles of solute / volume of solution (in liters)

To calculate the volume in liters, we need to convert 25 cm³ to liters:

25 cm³ = 0.025 L

concentration = 0.02 moles / 0.025 L = 0.8 moles per liter

Therefore, the concentration of NaOH is 0.8 M.

Diene is a type of organic compound that contains two double bonds between two carbon atoms.

What are Atoms?

Atoms are the smallest particle of any element that still maintains the properties of that element. Atoms are made up of a nucleus surrounded by one or more electrons. The nucleus is composed of protons and neutrons, and the electrons orbit around the nucleus. Atoms of different elements have different numbers of protons, neutrons, and electrons, which is what gives them their unique properties.

Diene is a conjugated molecule, meaning that its double bonds alternate with single bonds. Diene molecules are used in a variety of chemical reactions, including the formation of polymers and the synthesis of pharmaceuticals.

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Answer:

The volume of the gas is approximately 4.41 liters

Explanation:

The details of the data of the Neon gas are;

The number of moles of Neon gas present, n = 11.6 moles

The temperature of the sample of Neon gas, T = 120 K

The pressure of the sample of the Neon gas, P = 25.6 atm

By the ideal gas equation, we have;

P·V = n·R·T

Where;

R = The universal gal constant = 0.08205 L·atm·mol⁻¹·K⁻¹

Therefore, we get;

V = n·R·T/P

Which gives;

V = 11.6 moles × 0.08205 L·atm·mol⁻¹·K⁻¹ × 120 K/(25.9 atm) ≈ 4.4097915 L

The volume of the gas, V ≈ 4.41 L.

Answer:

I think it’s 7.0 moles of water.

Explanation:

gj

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Answer:

3.6m/s

Explanation:

v= fλ

v= 120* 0.03

v= 3.6 m/s

1. The glyoxylate cycle synthesizes glucose from acetyl-CoA under carbon limitation, while the citric acid cycle oxidizes acetyl-CoA for energy production.

2. Citric acid cycle intermediates oxaloacetate and α-ketoglutarate are replenished through anaplerotic reactions, including carboxylation of pyruvate or phosphoenolpyruvate, and transamination of glutamate.

3. Anaplerosis via amino acid metabolism and alternative carbon sources increases citric acid cycle intermediates' concentration.

1. The glyoxylate cycle differs from the citric acid cycle in that it operates in certain organisms (such as plants and bacteria) under conditions of carbon limitation, allowing the net synthesis of glucose from two molecules of acetyl-CoA. In contrast,

the citric acid cycle is a central metabolic pathway occurring in most organisms, involved in the oxidation of acetyl-CoA and energy production.

2. Two citric acid cycle intermediates and the pathways that replenish them are:

Oxaloacetate can be replenished through anaplerotic reactions, such as the carboxylation of pyruvate by pyruvate carboxylase or through the carboxylation of phosphoenolpyruvate by phosphoenolpyruvate carboxylase.

α-Ketoglutarate can be replenished through the transamination of glutamate by glutamate dehydrogenase or through the oxidative decarboxylation of isocitrate by isocitrate dehydrogenase.

3. One process to increase the concentration of citric acid cycle intermediates is through anaplerosis, which refers to the replenishment of depleted intermediates by various pathways,

including amino acid metabolism or by utilizing alternative carbon sources that can be converted into citric acid cycle intermediates through anaplerotic reactions.

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Given parameters;

Mass of gold colored metal beads  = 425g

Volume of water displaced by beads = 48.0cm³

Unknown;

Identity of the metal = ?

Given densities;

Gold: 19.3 g/mL

Copper: 8.86 g/mL

Bronze: 9.87 g/mL

Density is an intensive property of any substance. This implies that we can use the density of any substance to identify it.

Density can be defined as the mass per unit volume of a substance. Every substance has a unique mass per volume.

 Mathematically;

                    Density  = \(\frac{mass}{volume}\)

where mass is in kg or g

           volume is in  m³ or cm³

To find the density, we must know the mass and volume.

In this problem, the volume of the gold metal beads is the same as the volume of water displaced. This is a way to measure volume of solids.

Since the volume is given in cm³, and we are comparing with choices that have units in g/mL, we simply convert the volume in cm³ to mL

                   1cm³  = 1mL³

So therefore, volume of gold colored metal is 48mL

Now input the parameters given and solve for the density;

           Density  = \(\frac{425g}{48mL }\)    = 8.85g/mL

From the given densities, we clearly see that copper is the metal since they both of similar densities.

Answer:

Five.

Explanation:

The third principal energy level has one s orbital, three p orbitals, and five d orbitals, which can each hold up to 10 electrons. This allows for a maximum of 18 electrons.

Answer: 2 AgNO3(aq) + NiCl2(aq) ⇒ 2 AgCl(s) + Ni(NO3)2 (aq)

Explanation:

Answer:

kcl,cacl2

Explanation: