How much energy your body used, in joules if your health device indicates 982 Calories were burned during your workout? How many Calories in a meal containing 4.2 x 10 4 joules?

Chloroform's normal boiling point is 335 K given that the standard enthalpy of vaporization of chloroform is 31. 4 kj/mol and the standard entropy of chloroform is 93. 7 j/mol·k.

What function does chloroform serve?

A chemical known as a solvent, or one that facilitates the dissolving of other substances, is formaldehyde. Along with being used in the building, paper, and board industries, it is also used in the production of insecticides and films.

Given, 31.4 kJ/mol is the vaporisation enthalpy.

The standard entropy is 93. 7 j/mol k.

At equilibrium (when the liquid is boiling), according to the Gibbs free energy equation,

G = H - T (S), therefore

T (S) = H

S = H / T

93.8 = (31400 J/mol.) / T

T = 334.7 = 335K.

Chloroform has a 335K boiling point as a result.

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The same amount of time, the cobalt-60 sample will have a higher activity than the strontium-90 sample because more of its atoms will have decayed. However, over time, the activity of both samples will decrease as more and more atoms decay.

The activities (number of decays per second) of the samples will not be the same. This is because the half-life of strontium-90 is longer than that of cobalt-60, which means that it takes longer for half of the atoms in the strontium-90 sample to decay. Therefore, after the same amount of time, the cobalt-60 sample will have a higher activity than the strontium-90 sample because more of its atoms will have decayed. However, over time, the activity of both samples will decrease as more and more atoms decay.

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Answer:

CH₂

Explanation:

From the question given above, the following data were obtained:

Mass of compound = 1 g

Mass of CO₂ = 3.14 g

Mass of H₂O = 1.29 g

Empirical formula =?

Next, we shall determine the mass of Carbon and hydrogen present in the compound. This can be obtained as follow:

For Carbon, C:

Mass of CO₂ = 3.14 g

Molar mass of CO₂ = 12 + (2×16)

= 12 + 32

= 44 g/mol

Molar mass of C = 12 g/mol

Mass of C =?

Mass of C = molar mass of C/ Molar mass of CO₂ × Mass of CO₂

Mass of C = 12/44 × 3.14

Mass of C = 0.86 g

For hydrogen, H:

Mass of C = 0.86 g

Mass of compound = 1 g

Mass of H =?

Mass of H = (Mass of compound) – (mass of C)

Mass of H = 1 – 0.86

Mass of H = 0.14 g

Finally, we shall determine the empirical formula of the cyclopropane. This can be obtained as follow:

Mass of C = 0.86 g

Mass of H = 0.14 g

Divide by their molar mass

C = 0.86 / 12 = 0.07

H = 0.14 / 1 = 0.14

Divide by the smallest

C = 0.07 / 0.07 = 1

H = 0.14 / 0.07 = 2

Thus, the empirical formula of cyclopropane is CH₂

The main answer to your question is that the copper (Cu) sample will reach a higher temperature first after transferring 150 cal of heat to each sample.

For the explanation, we first need to convert calories to joules (1 cal = 4.184 J). Next, we will use the formula q = mcΔT, where q is the heat transferred, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.
For Cu: q = 150 cal * 4.184 J/cal = 627.6 J
ΔT = q / (m * c) = 627.6 J / (3.50 g * 0.38 J/g°C) ≈ 481.29 °C
The final temperature of Cu can be calculated by adding the initial temperature to the change in temperature:
Final temperature for Cu = 25.0°C + 481.29°C ≈ 506.29°C.

In summary, the copper sample will reach a higher temperature first, and its final temperature is approximately 506.29°C.

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\(\\ \rm\Rrightarrow C_1V_1=C_2V_2\)

\(\\ \rm\Rrightarrow 0.750V_1=275(0.5)\)

\(\\ \rm\Rrightarrow 3/4V_1=137.5/tex]

\(\\ \rm\Rrightarrow 3V_1=550\)

\(\\ \rm\Rrightarrow V_1=183.3mL\)

A compound is a substance made up of two or more elements that have chemically joined and can only be broken down chemically into simpler compounds. For instance, pure water is a compound.

Matter with a definite composition and set of characteristics is referred to as a substance. A substance is every pure element. It is a material when it is pure. Substance examples: Because iron is an element, it's also a substance. Methane is both a material and a compound.

There are two different types of pure substances: elements and compounds. One particular type of atom makes up each element, whether it exists on its own or as part of a molecule. Compounds are molecules made up of two simpler things than molecules.

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First, we will calculate the number of moles of mixture of Xenon and Neon gases.Number of moles of mixture of Xenon and Neon gases:

Let x be the mole fraction of Neon.

Therefore, (1 - x) is the mole fraction of Xenon

.Mole fraction of Neon + Mole fraction of Xenon = 1x + (1 - x) = 1x = 1 - (1 -

x = 0 + x

x = 0.279

Mole fraction of Neon = 0.279

Mole fraction of Xenon = 0.721

Number of moles of gas = (Total Pressure * Volume)/(Gas Constant * Temperature)

Number of moles of Xenon = (7.10 atm * 16.75L * 0.721)/(0.08206 * (273 + 30))

Number of moles of Xenon = 8.44 moles

Number of moles of Neon = (7.10 atm * 16.75L * 0.279)/(0.08206 * (273 + 30))

Number of moles of Neon = 3.29 moles

Now, we can calculate the partial pressure of Xenon and Neon.

Partial pressure of Xenon:

Partial Pressure of Xenon = Mole fraction of Xenon * Total Pressure

Partial Pressure of Xenon = 0.721 * 7.10 atm

Partial Pressure of Xenon = 5.12 atm

Partial pressure of Neon

Partial Pressure of Neon = Mole fraction of Neon * Total Pressure

Partial Pressure of Neon = 0.279 * 7.10 atm

Partial Pressure of Neon = 1.98 atm

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The amount of the 1.14% by mass KCl solution that will contain 20.3 grams of KCl will be 1780.70 grams.

The amount of KCl required is 20.3 grams.

The amount has to be obtained from a solution of 1.14% by mass KCl solution.

It means, 100 g of this solution will contain 1.14 grams.

So, we can write,

1.14 grams of KCl = 100grams solution

1 gram KCl = 100/114 grams solution.

20.3 grams of KCl = 20.3 x 100/1.14 grams solution.

20.3 grams of KCl = 1780.70 grams.

So, the mass of the solution will which has 20.3 grams of KCl will be 1780.70 grams.

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Answer:

No

Explanation:

Because the surface tempature is cooler than the sun if it is wrong its because i dont really know what u mean by giants but i have a idea so sorry if its wrong.

When a molecule lacks polar bonds, there is no permanent charge difference between parts of the molecule, and the molecule is nonpolar.

Because the electron charge on both atoms is identical, the Cl2 molecule has no polar bonds. As a result, it is a nonpolar molecule. Hydrocarbons are nonpolar molecular substances because none of the bonds in hydrocarbon molecules, such as hexane, C6H14, are significantly polar.

The molecule is nonpolar if the arrangement is symmetrical and the arrows are of equal length. The molecule is polar if the arrows are of different lengths and do not balance each other. The molecule is polar if the arrangement is asymmetrical.

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Answer:

resend again that question dear

The half life of the gold isotope can be obtained as 2.5 days

The duration it takes for half of the atoms in a sample of a radioactive substance to decay is known as the half-life. It is a gauge of how quickly a chemical decays radioactively. For describing the decay of isotopes, which are various forms of an element with the same number of protons but differing numbers of neutrons in their atomic nuclei, we utilize the idea of half-life.

By the use of the formula;

N/No = (1/2)^t/t1/2

6.25/100 = (1/2)^10/t1/2

0.0625 =  (1/2)^10/t1/2

(1/2)^4 =  (1/2)^10/t1/2

4 = 10/t1/2

t1/2 = 10/4

t1/2 = 2.5 days

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Answer:

As the plates travel horizontally past one other, no crust is formed nor destroyed.

Explanation: tectonic plates

Explanation:

Review and Study Material Before Going to Class. ...

Take Good Notes. ...

Practice Daily. ...

Take Advantage of Lab Time. ...

Use Flashcards. ...

Use Study Groups. ...

Break Large Tasks Into Smaller Ones.

reading a variety of chemistry books

Answer:

An ion is an atom or molecule that carries an electric charge.

Ions are identified by the use of a superscript to show the sign and size of their electric charge.

Negatively charged ions are called anions, and positively charged ions are called cations.

Explanation:

An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.

Oxygen and nitrogen from the atmosphere can be used as feedstock to produce chemicals such as ammonia, nitric acid, and sulfuric acid.

The components of the atmosphere, such as nitrogen and oxygen, can be used to produce important chemicals through industrial processes such as the Haber-Bosch process for ammonia synthesis and the production of nitric acid. Nitrogen and oxygen can also be used as oxidizers in combustion processes to produce energy and heat, such as in the burning of fossil fuels.

Additionally, carbon dioxide from the atmosphere can be used as a feedstock for the production of chemicals such as methanol and formic acid through processes like carbon capture and utilization. The use of atmospheric components in chemical production can help to reduce reliance on non-renewable resources and support the development of sustainable manufacturing processes.

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Answer:

the answer is A.

i think:/

Explanation:

c. Potential decreases and kinetic increases.

Explanation:

As the boulder is rolling down the hill, potential energy decreases as kinetic energy increases.

The absolute configuration of any of the amino acid is :

             H                                     H

              |                                        |

HOOC - C - NH₂                  H₂N - C - COOH

              |                                        |

            CH₃                                   CH₃

The configuration of the amino acid is indicated by the pointing H at the rear, the R group is in the right direction , The COOH group is in the left direction and the NH₃ group in the upward direction.

             H                                     H

              |                                        |

HOOC - C - NH₂                  H₂N - C - COOH

              |                                        |

            CH₃                                   CH₃

D - amino acid                      L - amino acid

The proteins which are naturally obtained are consist of the L - amino acid.  The L - of the amino acid are the one that found in the nature easily.

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Answer:

.5

Explanation:

Answer:

1.5

Explanation:

1.5

Answer:

because the gravity of the ball can't go that high

There is a law called conservation of energy which states that energy can neither be created nor be destroyed. It can be only transferred from one form to another form. Therefore, some energy is lost  to the environment as sound or heat.

Energy transfer is a phenomenon in which energy transfer from one matter to another matter. Energy can be transferred in two forms that are by doing work or by transferring heat.

Heat can be transferred by three ways conduction, convention and radiation. In conduction, when two object are in direct contact, transfer of molecules takes place. As the ball impacted the ground, the energy would have been lost to the environment as sound or heat.

Therefore, some energy is lost  to the environment as sound or heat.

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A first-order reaction has a rate constant it would take approximately 536 seconds for the reaction to be 43.6% complete.

The integrated rate law for a first-order reaction is:

ln([A]t/[A]0) = -kt

where [A]t is the concentration of reactant at time t, [A]0 is the initial concentration of reactant, k is the rate constant, and t is time.

To find the time required for the reaction to be 43.6% complete, we can rearrange the integrated rate law:

ln([A]t/[A]0) = -kt

ln(0.436/[A]0) = -3.6 x 10^-3 s^-1 * t

Solving for t:

t = -ln(0.436/[A]0) / (3.6 x 10^-3 s^-1)

Assuming [A]0 = [A]t (i.e., the reaction is starting with 100% of the reactant), we have:

t = -ln(0.436) / (3.6 x 10^-3 s^-1)

t = 536 seconds (rounded to three significant figures)

Therefore, it would take approximately 536 seconds for the reaction to be 43.6% complete.

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Si un gaz exerce une pression de 2,00 atm lorsque 20 bouffées de particules sont présentes alors pour 4,50 atm il faut 45 bouffées car 20 bouffées = 2,00 atm donc 2*20=40 +0,5 =4,50

Answer:

B

Explanation:

Both plain and plateau have flat surfaces. However, a plain is located in a low-lying area while a plateau is located on an elevated area. In essence, a plateau can be viewed as an elevated plain or a plain that is bordered by cliffs.

The correct option is B.

Answer:

s1 to GS as the amount of energy required to remove the electron is greatest when it is closest to the nucleus.

Explanation:

Fun facts:

When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.

Answer:

The answer is: S.1 to G.S

Hope this helpss :) <3

Explanation:

Answer:

Cohesion exists because of the polarity of water. The water has a dipole that causes it to act like a magnet, attracting other water molecules to it. ... The salt water has a much lower cohesion than plain water so it's attractive forces are less than plain water.

Answer:

b Atom X = 1; Atom Y = 7

Explanation:

a valence electron is an electron in the outer shell

So X has 1 in outer shell

Y has 7 in outer shell

36.2L of N2 can be produced.

1st) According to the stoichiometry of the reaction, 2 moles of NaN3 produce 3 moles of N2. Using the molar mass of NaN3 (65.0g/mol ) and N2 (28.0g/mol) we can convert the moles to mass, and we can see that with 130.0g of NaN3 we can produce 84.0g of N2.

Now, we can use a mathematical rule of three to calculate the grams of N2 that can be produced from 71.0g of NaN3:

So, 45.9g of N2 are produced from 71.0g of NaN3.

2nd) It is necessary to convert the grams of N2 produced to moles, so we can use it in the Ideal gas equation:

Now we know that 1.6mol of N2 are produced.

3rd) To calculate the volume of N2, it is necessary to use the Ideal gas equation and replace the values of Pressure (P), Temperature (T, in Kelvin) and Number of moles (n):

Finally, 36.2L of N2 can be produced from 71.0g of NaN3.

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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Answer:

Chemical change​

Explanation:

Usually when something is left for a while unused and not cared for it begins to have a chemical change and this chemical change shows rust.