A roller coaster car is moving 1.98 m/s
on flat ground, when it begins to
accelerate at 3.77 m/s². How much
time does it take to travel 45.8 m?
(Units)
Watch your minus signs!

Answer:

42

Explanation:

my brother said

The cell potential (Ecell) of the zinc-air battery at 25.0 degrees Celsius and a partial pressure of oxygen of 0.15 atm is 1.65 V.

To calculate the cell potential (Ecell) of the zinc-air battery at 25.0 degrees Celsius, we can use the Nernst equation, which relates the cell potential to the standard cell potential and the concentrations or pressures of the reactants:

\(E_{\text{cell}} = E^{\circ}_{\text{cell}} - \left(\frac{RT}{nF}\right) \ln(Q)\)

Where:

E°cell is the standard cell potential (given as 1.65 V)

R is the ideal gas constant (8.314 J/(mol·K))

T is the temperature in Kelvin (25.0 + 273.15 = 298.15 K)

n is the number of electrons transferred in the balanced cell reaction (2 in this case)

F is Faraday's constant (96485 C/mol)

Q is the reaction quotient

In this case, since we are given the partial pressure of oxygen (O2) in the air diffusing through the cathode (0.15 atm), we can use the partial pressure as a substitute for concentration.

The reaction quotient (Q) can be calculated using the partial pressures of the reactants and products (ZnO):

\(Q = \frac{{(P(\text{ZnO}))^2}}{{P(\text{O}_2)}}\)

Plugging in the values into the Nernst equation, we have:

Ecell = 1.65 V -\(\frac{{8.314 \, \text{J/(mol}\cdot\text{K)}} \times 298.15 \, \text{K}}}{{2 \times 96485 \, \text{C/mol}}} \right) \ln \left( \frac{{(P(\text{ZnO}))^2}}{{P(\text{O}_2)}} \right)\)

Let's calculate the cell potential (Ecell) using the given values:

Ecell = 1.65 V -\({{8.314 \, \text{J/(mol}\cdot\text{K)}} \times 298.15 \, \text{K}}}{{2 \times 96485 \, \text{C/mol}}} \right) \ln \left( \frac{{(0.15 \, \text{atm})^2}}{{0.15 \, \text{atm}}} \right)\)

Simplifying the equation further:

\(E_{\text{cell}} = 1.65 \, \text{V} - (0.0257 \, \text{V}) \ln \left( \frac{{0.15^2}}{{0.15}} \right)\)

Calculating the natural logarithm:

\(E_{\text{cell}} = 1.65 \, \text{V} - (0.0257 \, \text{V}) \ln(1)\)

Since ln(1) is equal to 0:

Ecell = 1.65 V - (0.0257 V) * 0

Ecell = 1.65 V

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Answer:

Formation of covalent bonds in water

Answer:

C

Explanation:

they are of same element but different mass no.

in chemistry language we call them isotopes

0.4 is the answer

hope it very helpful

The correct ranking of compounds in order of increasing keq for this equilibrium is Acetone < Propanone < Benzaldehyde.

The correct ranking of compounds in order of increasing keq for the equilibrium of each of the carbonyl compounds with HCN to produce cyanohydrins is

Acetone < Propanone < Benzaldehyde.

In the above reaction, the cyanide ion acts as a nucleophile and attacks the carbonyl carbon atom in the carbonyl compound to form an intermediate compound. Then the intermediate compound formed by the reaction between HCN and the carbonyl compound undergoes an intramolecular rearrangement to form cyanohydrin.Based on the stability of intermediate compound formed, the order of increasing stability is as follows:

Acetone < Propanone < Benzaldehyde.

Since the keq is directly proportional to the stability of the intermediate, the order of increasing keq for the equilibrium of each of the carbonyl compounds with HCN to produce cyanohydrins is

Acetone < Propanone < Benzaldehyde.

The correct ranking of compounds in order of increasing keq for this equilibrium is

Acetone < Propanone < Benzaldehyde.

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Answer:

C2H6 +02 ===>Co2 + H20.

Explanation:

The electron affinity is the energy change that occurs when an atom gains an electron to form a negative ion. The greater the electron affinity, the more energy is released. Among the given elements, the one with the highest electron affinity would be Br (bromine).

The electron affinity generally increases from left to right across a period in the periodic table. This is because, as we move from left to right, the atomic radius decreases while the nuclear charge (number of protons) increases, making the outermost electrons more strongly attracted to the nucleus. Among the given elements, Br is located on the right side of the periodic table and has a high nuclear charge, so it has the highest electron affinity.

Among the other options, C (carbon) and Li (lithium) have relatively low electron affinities, while Rb (rubidium) and Na (sodium) have larger atomic radii and lower nuclear charges than Br, so they have lower electron affinities. Therefore, Br has the greatest electron affinity among the given elements.

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A biochemical compound consisting of an amine group, a carboxyl group, and a side-chain substituent group is called an amino acid.

These organic molecules are the building blocks of proteins and play important roles in the body such as enzyme catalysis, cell signaling, and energy production.

The side-chain substituent group gives each amino acid its unique chemical and physical properties, determining its function and role in protein structure.

There are 20 standard amino acids found in proteins, each with its own specific characteristics. The sequencing of these amino acids determines the primary structure of a protein, which ultimately influences its overall structure and function.

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A biochemical compound consisting of an amine group, a carboxyl group, and a side-chain substituent group is called  amino acid.

Amino acids are the building blocks of proteins and are essential for many biological processes. They play crucial roles in the structure, function, and regulation of cells and tissues. Amino acids have a basic structure that includes an amine group (-NH2), a carboxyl group (-COOH), and a side-chain substituent group.

The side chain can vary, giving different amino acids unique properties. There are 20 common amino acids found in proteins, each with its own distinct chemical characteristics and functions. They can be classified as essential or non-essential, depending on whether the body can produce them or they need to be obtained from the diet. Overall, amino acids are fundamental to the existence and functioning of living organisms.

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The different colors in Kaleidoscope Lane can be attributed to a mix of colorful objects, reflective surfaces, diverse light sources, and the interaction of colors, creating a visually captivating environment similar to the patterns seen in a kaleidoscope.

The different colors in Kaleidoscope Lane can be seen due to the combination of the following factors:
1. Colorful objects: The lane might be decorated with various colorful items like street art, murals, or decorations, which contribute to the vibrant colors seen in the area.
2. Reflection: A kaleidoscope is an optical instrument that uses mirrors to reflect light and create symmetrical patterns. In Kaleidoscope Lane, reflective surfaces or mirrored installations might be placed to bounce light off and create colorful patterns similar to those seen in a kaleidoscope.
3. Light sources: Different colored lights or filters might be installed in the lane to illuminate the surroundings, which results in a variety of colors being seen.
4. Interaction of colors: As light bounces off multiple surfaces and interacts with various colored objects in the lane, the colors blend and create new combinations, further contributing to the visual spectacle.

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Answer:

have a negative electrical charge of one (-1)

Explanatio

Electrons have an electrical charge of negative one. When you think electron, always think -1

Answer:

negitive 5 or -5

Explanation

usally 12-7 = 5 but 7 is first so it you turn 5 to negitive 5

or -5

The  spin quantum number will be 2 and 2.5 and multiplicity in each case will be 5 and 6.

The angular momentum of such an electron is described by its spin quantum number (ms). An electron carries orbital angular momentum in addition to angular momentum around its axis of rotation. The Spin Quantum Number (s) really does have a magnitude (1/2) and a direction (+ or -) since angular momentum would be a vector.

(i) If an atom has 4 electrons then it will have total

Total spin quantum number = 1/2+1/2+1/2+1/2 = 4/2=2

Multiplicity = 2S+1= 2×2+1=5

(ii)  If an atom has 5 electrons then it will have

Total spin quantum number = 1/2+1/2+1/2+1/2+1/2 = 5/2 = 2.5

Multiplicity = 2S+1= 2×2.5+1=6

Therefore, the spin quantum number will be 2 and 2.5

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Answer:

About 3.201g O2

Explanation:

Answer:

If the temperature of the system is increased, then the equilibrium position would shift to the right side. According to Le Chatelier's principle, when a stress is applied to a system in equilibrium, the system will adjust itself to counteract the stress. In this case, increasing the temperature would be an external stress on the system, and the reaction would shift to consume more of the reactants, namely CH4 and H2S, to create more of the products, CS2 and H2, thus shifting the equilibrium position towards the products.

Explanation:

Answer:

it looks smaller for sure ^_^

Answer:

q_metal = -12000 J = -12 KJ

Here, the negative sign indicates that the energy is lost by the metal piece.

Explanation:

The magnitude of energy change of the metal X can be given by the following formula:

\(q_{metal} = mC\Delta T\)

where,

m = mass of metal = 100 g

C = Specific Heat Capacity of metal X = 0.24 J/g.°C

ΔT = Change in Temperature of Metal Piece = 0° C - 500°C = -500°C

Therefore, using these values in the equation, we get:

\(q_{metal} = (100\ g)(0.24\ J/g^oC)(-500^oC)\\\)

q_metal = -12000 J = -12 KJ

Here, the negative sign indicates that the energy is lost by the metal piece.

The general formula of an ester functional group is RCOOR', where R and R' represent an alkyl or aryl groups. This functional group can be found in many organic compounds and is characterized by the presence of a carbon double-bonded to an oxygen atom (carbonyl group), and also bonded to another oxygen atom (the alkoxy group), which is then bonded to another carbon or hydrogen. #SPJ11

Answer:

100 ml

Explanation:

The neutralization reaction is:

NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l)

Since 1 mol NaOH reacts with 1 mol HCl, at the equivalence point of the titration, the number of moles of NaOH is equal to the number of moles of HCl. We calculate the moles as the product of molarity (M) and volume (V):

moles NaOH = moles HCl

M(NaOH) x V(NaOH) = M(HCl) x V(HCl)

Thus, we calculate the volume of NaOH needed to completely neutralice HCl:

V(NaOH) = (M(HCl) x V(HCl)) /M(NaOH)

               = (0.02 M x 50 ml)/ (0.01 M)

               = 100 ml

Therefore, 100 ml of 0.01 M NaOH are required to neutralize 50 ml of 0.02 M HCl.

16.32 has the least amount of decimal places

Answer:

16.32

Explanation:

Yes its a larger number however, If you were to move the decimal point to the end of each number then 16.32 would be moved the least.

Response to the environment. The same reasons why bananas grow curved; it to be closer to the sun. If the lights source was coming from beneath they would be straight!

Answer:

relative humidity

Explanation:

1. Some reactions will present an actual yield lower than the theoretical yield, and this can occur due to many situations, a couple of the reasons why that we can list is that some reactions don't have the reactants actually reacting to form the products, and another reason why is the loss of reactants in the process for many possible situations.

4. According to the solubility curve, if we have 30 grams of NH4Cl at 50°C, the reaction will be unsaturated

Answer:

2nd answer

Explanation:

The first answer is wrong because when the gas molecules collide with the walls of the container or with other molecules, there is no loss in the kinetic energy of the gas molecules.

And the third answer is describing a solid.

The structure in the figure where an electron transport chain is located is the inner mitochondrial membrane.

The main function of the processes that occur in the inner mitochondrial membrane, specifically in the electron transport chain, is to generate ATP through oxidative phosphorylation.

The electron transport chain is a series of protein complexes embedded in the inner mitochondrial membrane. It plays a crucial role in the final stage of cellular respiration, which is the process by which cells extract energy from nutrients.

During oxidative phosphorylation, electrons are transferred through the electron transport chain from energy-rich molecules such as NADH and FADH2.

As electrons pass through the protein complexes, their energy is gradually released, and protons (H+) are pumped across the inner mitochondrial membrane from the mitochondrial matrix to the intermembrane space. This creates an electrochemical gradient.

The main function of this electron transport and proton pumping is to establish a proton motive force.

The gradient created by the electron transport chain drives the ATP synthase enzyme, located in the inner mitochondrial membrane, to produce ATP from ADP and inorganic phosphate. This process is known as chemiosmosis.

Overall, the electron transport chain in the inner mitochondrial membrane plays a crucial role in generating ATP, the energy currency of the cell, by utilizing the energy stored in the electrons derived from the breakdown of nutrients.

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Answer:

shale

Explanation:

An example of clastic sedimentary rock is shale which are made up of small pieces of fragmented rocks .

They are the types of rocks which are formed as a result of accumulation of minerals or organic particles at the surface of the earth.Sedimentation is the name given to a collective process  which cause the particles to settle.

The study of sedimentary rocks is useful in civil engineering  and as important sources  of coal, fossil fuels and ores.The color of sedimentary rock is often determined by iron content  and sometimes due to the presence of organic matter.

They are classified  based on origin in to 4 types which are clastic, biochemical ,chemical and other sedimentary rocks.While based on composition they are classified as siliciclastic,carbonate ,evaporite,organic rich,siliceous ,iron-rich and phosphatic sedimentary rocks.

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Answer:

Explanation:

for me, but the best. . the first one. . the first one

Answer: 44.8 L

At STP, 2 moles of hydrogen gas have a volume of 44.8 L.