What is the volume of a bar of soap that has a density of 2.5 g/cm3 and a mass of 100 g?
O4 cm3
O 0.4 cm3
O 400 cm3
O 40 cm3

Answer:

i dont know thank you soo much

Sun-Bleached hair.

You can't exactly pass down piano skills, they have to be taught and also you can't just be born with strong muscles, they also have to develop over time. Height can't exactly be passed down because some parents are tall and their kids come out short. That leaves the only other option to be Sun-Bleached Hair (hair color).

Hope this helps and have a nice day.

-R3TR0 Z3R0

1) The mass would decrease by 4 units

2) The mass of the radioisotope would remain unchanged.

3) The mass does not change when the gamma ray is released.

4) The number of protons will decrease by four units

5) The number of the protons would decrease by 1

6) The number of protons remains the same.

The spontaneous process of radioactive decay involves the alteration of an unstable atom's nucleus, which releases radiation.

The protons and neutrons in unstable atomic nuclei are imbalanced, which makes them intrinsically unstable and drives them to search for a more stable state.
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Answer:

Explanation:

Mg + Cl2 ----> MgCl2

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Answer: If one mole of carbon monoxide has a mass of 28.01 g and one mole of carbon dioxide has a mass of 44.01 g , it follows that the reaction produces 44.01 g of carbon dioxide for every 28.01 g of carbon monoxide.

Explanation: (May Be Unrelated?)

Answer and Explanation:

For computing the initial quantity of helium we have to apply the law of ideal gas which is shown below:

\(pV=nRT\\)

\(n=\dfrac{pV}{RT}\)

Now we have to compute the ratio between the initial and the final numbers of moles which is

\(\dfrac{n_1}{n_2}=\dfrac{\dfrac{p_1V_1}{RT_1}}{\dfrac{p_2V_2}{RT_2}}\)

The statement defines that

\(T_1=T_2,~p_1=p_2.\)

Therefore

\(\dfrac{n_1}{n_2}=\dfrac{V_1}{V_2}\)

\(\dfrac{n_1}{3.8\times10^{-4}}=\dfrac{230}{860}\iff\\\\ n_1=\dfrac{3.8\times10^{-4}\times230}{860}\)

\(\boxed{n_1\approx1.0\times10^{-4}~mol}\)

And, the variables are known is starting volume and ending gas quantity

Answer:

beginning volume and ending quantity of gas

Explanation:

Answer:

Thus, the required heat is 79kJ 79 k J .

Explanation:

i think its the right bottem one

The empirical formula of the compound would be  \(Al_2S_3\)

The compound is composed of aluminum and sulfur:

Al = 35.94                                S = 64.06

Find the mole of each component

Al = 35.94/26.98                       S = 64.06/32

     = 1.33                                        = 2.00

Divide by the smallest:

Al = 1.33/1.33                                   S = 2/1.33

    = 1                                                  = 1.5

Thus, the empirical formula of the compound is \(Al_2S_3\)

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The empirical formula of the compound from the calculations done is AlS2.

The term empirical formula refers to the simplest formula of a compound. It shows the ratio of atoms of elements in the molecule.

Now, we divide each percentage with the relative atomic mass of the element;

Al - 35.94/27     S - 64.06/32

1.33                           2.00

Divide through by the lowest ratio;

1.33/1.33                 2.00/1.33

A - 1                       S - 2

The empirical formula of the compound is AlS2.

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Molality of a solution is defined as the number of moles of solute per kilogram of solvent. The formula for molality is given by the following equation:molality (m) = moles of solute / mass of solvent (in kg)In order to calculate the molality of a 12 percent urea solution, we need to first determine the mass of urea present in the solution.

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The grams of hydrogen gas can be burned if 40. liters of oxygen at 200. k and 1.0 atm is 4.88 grams.

Grams (W) of any substance will be calculated by using their moles (n) through the following equation:

M = molar mass

And moles of the gas will be calculated by using the ideal gas equation as:

P = pressure = 1atm

V = volume = 40L

n = moles = ?

R = universal gas constant = 0.082 L.atm / K.mol

T = temperature = 200K

On putting these values on the above equation, we get

n = (1)(40) / (0.082)(200) = 2.439 = 2.44 moles

W = (2.44mol)(2g/mol) = 4.88g

Hence required mass of hydrogen gas is 4.88g.

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Cloud is a gas.

ice is a solid.

snow is a solid.

steam is a gas.

rain is a liquid.

Answer:

this does not look like chemistry but I believe your answer is 50.9439

Explanation:

hope it helps

The concentration of sodium ion, Na⁺ in the solution, given that 23.6 grams of Na₃PO₄ is dissolved in 750 mL of water is 0.576 M

We'll begin by obtaining the molarity of the solution. This is illustrated below:

Molarity = mole / volume

Molarity = 0.144 / 0.75

Molarity = 0.192 M

Finally we shall determine the concentration of the sodium ion, Na⁺. Details below:

Na₃PO₄(aq) <=> 3Na⁺(aq) + PO₄³⁻(aq)

From the balanced equation above,

1 mole of Na₃PO₄ contains 3 moles of Na⁺

Therefore,

0.192 M Na₃PO₄ will contain = 0.192 × 3 = 0.576 M Na⁺

Thus, the concentration of Na⁺ is 0.576 M

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Answer:

Skeleton equation: H2S(g) + O2(g) → SO2(g) + H2O(l)

Explanation:

Yes, it affects the body’s ability to grow and repair cells.

As insulin is a hormone that turns glucose into energy for cellular functions through the process of cellular respiration, the blood glucose level rises when insulin is not produced in sufficient amounts or cells are unable to use the insulin.

The increased blood glucose levels impede the healing of wounds or prevent them from healing or repairing. In such a diabetic case, a small foot wound can grow into a foot ulcer very quickly. When blood sugar levels are high, blood vessels stiffen or constrict, slowing the flow of oxygen through the body in diabetics.

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Answer: Organic acids form when a carboxyl group (−COOH) is substituted for one of the hydrogen atoms in a hydrocarbon.

If the sample of magnesium used in a lab was contaminated with another metal that doesn't react with hydrochloric acid, then the results obtained in the experiment would be affected.

This is because the data collected during the experiment would reflect the reaction between hydrochloric acid and the contaminated sample instead of pure magnesium. As a result, the following changes in results might have been observed:

1. The mass of the contaminated sample would be higher than the mass of pure magnesium.

2. The rate of reaction between the contaminated sample and hydrochloric acid would be slower than the reaction between pure magnesium and hydrochloric acid.

3. The volume of hydrogen gas collected from the reaction would be lower than the volume of hydrogen gas collected in the reaction between pure magnesium and hydrochloric acid.

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The frequency is 7.5 x 10¹⁴ Hz and the energy is 4.97 x 10⁻¹⁹ J of blue light that has a wavelength of 400 nm.

The length of the a wave is expressed by its wavelength. The wavelength is the distance between one wave's crest and the following wave's crest. The wavelength can also be determined by measuring from of the "trough" (bottom) with one waveform to the "trough" of the following wave.

v = c/λ

v = 3.0 x 10⁸/4.0 x 10⁻⁷

v = 7.5 x 10¹⁴ Hz

400 nm = 4.0 x 10⁻⁷

E = hv

E = (6.63 x 10⁻³⁴)(7.5 x 10¹⁴)

E = 4.97 x 10⁻¹⁹ J

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To calculate the time it takes to recharge the battery, we need to use the concept of Faraday's laws of electrolysis.

Faraday's second law states that the amount of substance deposited or liberated at an electrode during electrolysis is directly proportional to the quantity of electricity passed through it.
First, let's find the number of moles of pb(s) consumed during discharge. We can use the molecular weight of pb to convert grams to moles:

1.00 g Pb x (1 mol Pb / 207.2 g Pb) = 0.004825 mol Pb.
Since 1.36 A of current flows through the battery during charging, we can calculate the number of Coulombs (C) of charge passed through the battery per second using the equation: Q = I * t, where Q is the charge in Coulombs and I is the current in Amperes. Thus, Q = (1.36 A) * (1 s) = 1.36 C.
Now, let's find the number of moles of pbso4(s) formed during discharge. Each mole of pb(s) consumes two moles of electrons to convert to pbso4(s). Therefore, the number of moles of pbso4(s) formed is equal to twice the number of moles of pb(s) consumed: 2 * 0.004825 mol Pb = 0.00965 mol PbSO4.
To calculate the time required for recharging, we divide the quantity of electricity passed (1.36 C) by the number of Coulombs required to produce 1 mol of pbso4(s). This can be calculated using Faraday's constant, F = 96485 C/mol. Thus, t = Q / (F * n), where t is the time in seconds, Q is the charge in Coulombs, F is Faraday's constant, and n is the number of moles of pbso4(s) formed.
t = (1.36 C) / (96485 C/mol * 0.00965 mol)

= 0.1456 s.
Finally, we convert the time to minutes by multiplying by 60 seconds per minute:

t = 0.1456 s * (1 min / 60 s)

= 0.00243 minutes.
Therefore, it will take approximately 0.00243 minutes (or about 0.146 seconds) to recharge the battery.

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To calculate the time it will take to recharge the battery, we need to use the concept of Faraday's law of electrolysis.

First, let's find the number of moles of PbSO4(s) that is formed by the consumption of 1.00 g of Pb(s) at the anode. To do this, we divide the mass of Pb(s) by its molar mass:

1.00 g Pb / 207.2 g/mol = 0.00482 mol Pb

Next, we can use the stoichiometry of the reaction to find the number of moles of electrons transferred during the conversion of PbSO4(s) back to Pb(s). The balanced equation shows that 2 moles of electrons are transferred for every 1 mole of PbSO4(s) formed:

0.00482 mol Pb * 2 mol e-/1 mol PbSO4 = 0.00964 mol e-

Now, we can use Faraday's law to calculate the total charge (Q) required to convert PbSO4(s) back to Pb(s):

Q = n * F

where n is the number of moles of electrons transferred and F is Faraday's constant (96485 C/mol).

Q = 0.00964 mol e- * 96485 C/mol = 932.194 C

Finally, we can calculate the time (t) required to recharge the battery using the equation:

t = Q / I

where I is the current produced by the alternator (1.36 A).

t = 932.194 C / 1.36 A = 685.15 s

To convert seconds to minutes, we divide by 60:

685.15 s / 60 s/min = 11.419 min

Rounded to three decimal places, it will take approximately 11.419 minutes to recharge the battery.

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The binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond.  Option b

Aminoacyl-tRNA is a complex molecule that plays a crucial role in protein synthesis. It consists of a tRNA molecule covalently linked to an amino acid. The amino acid is attached to the 3' end of the tRNA molecule through an ester bond.

An ester bond is formed between the carboxyl group (-COOH) of the amino acid and the hydroxyl group (-OH) of the ribose sugar at the 3' end of the tRNA molecule. This ester bond is also referred to as an ester linkage. The formation of the ester bond is catalyzed by the enzyme aminoacyl-tRNA synthetase.

The ester bond in aminoacyl-tRNA is essential for protein synthesis. During translation, the aminoacyl-tRNA molecule carries the specific amino acid to the ribosome, where it is incorporated into the growing polypeptide chain. The ester bond is later hydrolyzed, releasing the amino acid for further use in protein synthesis.

In summary, the binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond between the carboxyl group of the amino acid and the hydroxyl group of the ribose sugar in the tRNA molecule.

Option b

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True.

The Mass Undergoes change only in ( Solid state to liquid state ) Ice Cube to Water .

Mass changes from mg to litre.

\(\huge\mathfrak\red{hope \: it \: helps}\)

Answer:

Atoms form chemical bonds to make their outer electron shells more stable. The type of chemical bond maximizes the stability of the atoms that form it. ... Covalent bonds form when sharing atoms results in the highest stability. Other types of bonds besides ionic and covalent chemical bonds exist, too.

Explanation:

Elastic Potensial energy is what causes a ball to bounce or rebound because it is transformed into kinetic energy, which is then used to bring the ball back up.

Answer:

Evaporating the solvent

Explanation:

The transfer of energy doe not always affect the appearance of the lake because it can attain a form that is quite similar to the other. It can be because of conduction, convection, and radiation.

Heat transference can be described as a natural phenomenon that can be caused by conduction, convection, or radiation.

Convection can be defined as the transfer of energy in a given fluid such as, in this case, water. The energy transfer is due to particular molecular motion, energy is transferred by bulk, or macroscopic, the motion of the fluid.

Radiation can be defined as heat transfer through space due to electromagnetic radiation. Conduction can be defined as the transfer of energy between molecules due to direct contact.

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Answer:

75 grams

Explanation:

At 95 °C, you can dissolve up to 75 grams of K2Cr2O7 in 100 mL of water.

The solubility of a substance in a particular solvent is the maximum amount of that substance that can dissolve in the solvent at a given temperature. The solubility of a substance can be affected by factors such as temperature, pressure, and the presence of other substances.

For K2Cr2O7, the solubility in water is highly dependent on temperature. At 95 °C, the solubility of K2Cr2O7 in water is approximately 75 g/100 mL. This means that at 95 °C, you can dissolve up to 75 grams of K2Cr2O7 in 100 mL of water. Since 100 g of water is equivalent to 100 mL, you can dissolve up to 75 grams of K2Cr2O7 in 100 g of water at 95 °C.

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Answer:

1. Crush the sugar into powder.

2. Heat the water.

3. Dissolve it by stirring continuously

Explanation:

1. Crushing the sugar into powder increases surface area. So it increases the changes of dissolving

2. Heating the water increases the capacity of water to dissolve sugar.

3. Stirring continuously increases randomness of particles so eases mixing up thus increasing dissolving tendency.

The Na+/K+ pump helps a muscle cell maintain a state of "resting membrane potential." The resting membrane potential is the difference in voltage across the cell membrane when the muscle cell is not actively contracting.

The Na+/K+ pump plays a crucial role in this process by actively transporting three sodium ions (Na+) out of the cell and two potassium ions (K+) into the cell.

This exchange creates an electrochemical gradient, resulting in a net negative charge inside the cell and a net positive charge outside the cell.

This gradient is essential for the proper functioning of muscle cells, as it allows them to respond to stimuli and initiate muscle contractions.

In summary, the Na+/K+ pump is essential for maintaining the resting membrane potential in muscle cells, ensuring their proper function and responsiveness.

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Answer:

\({ \rm{2H {}^{ + } _{(aq)} + CO {}^{2 - } _{3(aq)} \: \: \: {}^{ { \huge{\dashrightarrow} }} _{ \huge{ \dashleftarrow}} }} \: \: { \rm{H _{2} CO _{3(aq)} }}\)