If a temperature system decreases in a chemical reaction, the resulting value for q from the specific heat equation is?
A. positive
B. negative
C. Constant
D. Not enough information to be determined

Answer: The percent is 25.263%

Explanation:

Answer:

It's B And if it is not, I help you to do more things that you need.

Answer:

Removing heat causes water (a liquid) to freeze to form ice (a solid). When water changes to a solid or a gas, we say it changes to a different state of matter. ... This causes the hydrogen atoms in one water molecule to be attracted to the oxygen atom in another water molecule.

Explanation:

Answer: A molecule of hydrochloric acid, for example, is composed of a hydrogen atom and a chlorine atom. When these molecules dissolve into water, they separate into a positively charged hydrogen ion and a negatively charged chlorine ion. ... Only some of the molecules of weak acids disassociate when added to water.

Explanation:

When MgCl2 (Magnesium chloride) dissolves in water gives a faintly acidic solution (pH = approximately 6).

Answer:

9.85

Explanation:

M1V1 =M2V2

6.20×v1= 0.470×0.130

v1 = ( 0.470 × 0.130 ) ÷ 6.20

v1 = 0.0098 L × 1000

V1 = 9.8 ml

The 4-methyl pentane-2-ol (\(C_6H_{14}O\)) is an alcohol compound with a methyl group attached to the fourth carbon atom and a hydroxyl group attached to the second carbon atom in a five-carbon chain.

For more questions on methyl group

https://brainly.com/question/31238796

#SPJ8

A switch connects with multiple devices, such as, computers, wireless access points, printers, and servers.

For example, this quote states that "Switches are key building blocks for any network. They connect multiple devices, such as computers, wireless access points, printers, and servers; on the same network within a building or campus. A switch enables connected devices to share information and talk to each other."

Answer:

B. hot to cold

Explanation:

Energy wants to reach thermal equilibrium (which is basically just balanced temperature) so it will move from hot to cold to make the cold object warmer and the hot object cooler.

Without knowing more about the individual balloon and its surroundings, it is impossible to estimate the precise amount of time it would take for a helium-filled balloon to deflate.

Nonetheless, based on helium's general characteristics and its slower rate of diffusion than hydrogen, we would anticipate that a helium-filled balloon will outlast a hydrogen-filled balloon under comparable circumstances.

Generally, the helium gas diffuses slowly as compared to the hydrogen gas and that's why many ballon these days are filled with helium gas. Helium gas has the larger atomic size and lower solubility in many materials.

To estimate the time it would take for a helium-filled balloon to go flat, we can use the same basic formula that governs the diffusion of gases through materials.

This formula, known as Fick's law of diffusion, describes the rate at which a gas diffuses through a material as proportional to the concentration gradient of the gas across the material, as well as to a constant known as the diffusion coefficient.

In summary it is very difficult to exactly state the time in which  helium balloon to go flat without knowing the environment and other important factors.

To know more about helium gas -

brainly.com/question/1780577

#SPJ4

Cooking an egg is endothermic because the egg gains heat from the surrounding and Formation of snow is exothermic because water loses heat to the surroundings wh becomes snow.

Exothermic processes generate heat, which raises the temperature of the surrounding environment. Endothermic processes absorb heat and cool the environment."

Simply put, endothermic reactions absorb energy from their surroundings in the form of heat. An exothermic reaction, on the other hand, releases energy into the system's surroundings. Photosynthesis is a well-known example of an endothermic chemical reaction.

Thus, Cooking an egg is an endothermic process.

To learn more about an endothermic and exothermic, follow the link;

https://brainly.com/question/4345448

#SPJ1

Your question is incomplete, most probably your question was

Which of the following are exothermic and endothermic ?

cooking an egg is endothermic because the egg gains heat from the surrounding Formation of snow is exothermic because water loses heat to the surroundings wh becomes snow. Cooking an egg is exothermic because the egg loses heat to its surroundings.

There could be several reasons why the crystallization failed. One possibility is that the impurities in the sulfanilamide prevented the formation of crystals.

Another possibility is that the solution was not cooled slowly or sufficiently, which could prevent the formation of crystals.

Another reason why the crystallization might have failed is due to the solvent choice. Ethyl alcohol might not be the best solvent for sulfanilamide, and a different solvent might be needed to achieve the desired crystal formation. Additionally, the temperature of the solution may not have been low enough, or it may not have been cooled slowly enough for the crystals to form.

To make the crystallization work, a seed crystal can be added to the solution. A seed crystal is a small crystal of the same substance that is added to the solution to promote crystal growth. The seed crystal provides a surface for the molecules in the solution to attach to and align with, which can encourage the formation of additional crystals. The seed crystal can be added by touching it to the bottom of the container or by dropping it into the solution. Alternatively, the solution can be left to cool for a longer period of time, or it can be seeded and then left to cool slowly.

Learn more about crystals here:

https://brainly.com/question/16701302

#SPJ4

The amount of heat energy lost by the 100 mL of water when it all freezes is 33400 J

Mass = Density ×Volume

Mass of water = 1 × 100

Mass of water = 100 g

Q = m × ΔHf

Q = 100 × 334

Q = 33400 J

Learn more about heat transfer:

https://brainly.com/question/6363778

The best electron acceptor for an energetically favorable reaction would be \(CO_2\).

In redox reactions, the relative standard reduction potentials of the involved redox couples determine the direction and feasibility of electron transfer. The more positive the reduction potential, the stronger the oxidizing agent. Comparing the reduction potentials of the given redox couples, pyruvate/lactate has a potential of -0.19 V, while \(CO_2\)/acetate has a more negative potential of -0.28 V. This indicates that \(CO_2\)/acetate is a stronger electron acceptor.

Redox reactions involve the transfer of electrons between reactants. The standard reduction potential (E°) is a measure of the tendency of a substance to gain electrons. A more negative E° value indicates a stronger oxidizing agent. In this case, the \(CO_2\)/acetate redox couple has a more negative potential than the pyruvate/lactate couple, suggesting that \(CO_2\) is a better electron acceptor. This information helps determine the direction and feasibility of the redox reaction.

Learn more about electron acceptor

brainly.com/question/13592516

#SPJ11

The 1H NMR spectrum contains two signals. Because of the symmetry of 1,4-dimethylbenzene, all four aromatic protons are chemically identical. The two methyl groups are also equal. The 1H NMR spectrum contains two signals.

The four nuclei exist in identical intramolecular settings, making them chemically comparable. As a result, a 1H NMR experiment will produce only one signal in the spectrum to represent all four hydrogens at a single chemical shift.

The 1H NMR spectrum has three components. 1,3-dimethylbenzene: Hb is located between two methyl groups, the two Hc protons are one carbon away from a methyl group, and Hd is two carbons away from a methyl group.

To know more about hydrogens visit

https://brainly.com/question/28937951

#SPJ4

A system of linear equations to balance the following chemical reaction:

Limestone, CaCO₃, neutralizes the acid, H₃ O, in acid rain is:

2H₃O + CaCO₃ → 3H₂O + Ca + CO₂

To balance the chemical equation:

H₃O + CaCO₃ → H₂O + Ca + CO₂

We need to ensure that the number of atoms of each element is the same on both sides of the equation.

Let's assign variables to the coefficients of each compound:

H₃O: x

CaCO₃: y

H₂O: z

Ca: a

CO₂: b

Now, we can set up the system of equations based on the number of atoms for each element:

For hydrogen (H):

3x = 2z

For oxygen (O):

3x + 3y = 2z

For calcium (Ca):

y = a

For carbon (C):

y = b

For calcium (Ca):

a = 1

Solving this system of equations will give us the balanced coefficients. Let's solve it:

From the equation y = a, we have y = 1.

From the equation y = b, we have b = 1.

Substituting b = 1 into the equation 3x + 3y = 2z, we have:

3x + 3 = 2z

From the equation 3x = 2z, we have x = (2/3)z.

Substituting x = (2/3)z into the equation 3x = 2z, we have:

3(2/3)z = 2z

2z = 2z

This equation is true for any value of z, indicating that z can take any value.

Therefore, we can choose z = 3 to simplify the coefficients:

x = (2/3)z = (2/3)(3) = 2

y = 1

z = 3

a = 1

b = 1

Thus, the balanced equation is:

2H₃O + CaCO₃ → 3H₂O + Ca + CO₂

To know more about linear equations here

https://brainly.com/question/32634451

#SPJ4

Answer:

13.Teeth breaking down the food in your mouth

14. Water evaporates from the surface of the ocean

15.a rusted old truck in your neighbors driveway chemical change

16.cream being whipped physical change

17.mowing the lawn is a physical change

18.fireworks exploding chemical change

19. physical change squeezing oranges to make orange juice

20.melting butter for popcorn physical change

21.baking an apple pie

22.slicing a piece of pie for your friend

23.frying an egg chemical change

24.shredding paper

25.curdling milk

l

Based on the given isotopic composition, the relative contribution of C3 plants is higher compared to C4 plants in the soil organic matter of Kenya.

To determine the relative contribution of C3 and C4 plants to the soil organic matter in Kenya based on their stable carbon isotopic composition, we can use the concept of isotopic discrimination.

C3 and C4 plants have different photosynthetic pathways, and they exhibit distinct carbon isotope signatures. C3 plants typically have a more negative δ13C value (around -30 permil to -22 permil), while C4 plants have a less negative δ13C value (around -16 permil to -9 permil).

In this case, the soil organic matter in Kenya has a δ13C value of -18 permil, while the air δ13C value is -7 permil. The difference between these values (-18 permil - (-7 permil)) gives us the isotopic discrimination between the atmosphere and the soil organic matter.

δ13C discrimination = δ13C organic matter - δ13C atmosphere

δ13C discrimination = -18 permil - (-7 permil)

δ13C discrimination = -11 permil

Since the δ13C discrimination is negative, it suggests that C3 plants have a dominant contribution to the soil organic matter. C4 plants, with their less negative δ13C values, are less likely to contribute significantly to the organic matter in this case.

Therefore, based on the given isotopic composition, the relative contribution of C3 plants is higher compared to C4 plants in the soil organic matter of Kenya.

Learn more about isotopic composition from the link given below.

https://brainly.com/question/10969592

#SPJ4

The kinetic energy is 0.5177 × 10⁻²¹ J more at 50°C compared to 25°C.

The average kinetic energy of a molecule is directly proportional to the absolute temperature of a gas.

KE = ( 3/2 ) ( R / Nₐ ) T

Where T is the temperature of the molecule, R is the gas constant, and Nₐ is Avogadro's number.

Now, R = 8.314 J/mol.K

Avogadro's number, Nₐ = 6.022 × 10²³ atoms/ mol

The average kinetic energy at 50° C is:

T = 50° C = 323 K

KE₁ = ( 3/2 ) × ( R / Nₐ ) × T₁

KE₁ = ( 3 × 8.314 × 323 ) / ( 2 × 6.022 × 10²³ )

KE₁ = 668.90 × 10⁻²³ J

KE₁ = 6.6890 × 10⁻²¹ J

The average kinetic energy at 25°C is:

KE₂ = ( 3/2 ) × ( R / Nₐ ) × T₂

KE₂ = ( 3 × 8.314 × 298 ) / ( 2 × 6.022 × 10²³ )

KE₂ = 617.13 × 10⁻²³ J

KE₂ = 6.1713 × 10⁻²¹ J

Now,

The average kinetic energy of the molecules at 50° C compared to 25° C is:

KE = KE₁ - KE₂

KE = 6.6890 × 10⁻²¹ - 6.1713 × 10⁻²¹

KE = 0.5177 × 10⁻²¹ J

Hence, the average kinetic energy is 0.5177 × 10⁻²¹ J more at 50° C compared to 25° C.

Learn more about kinetic energy here:

https://brainly.com/question/8101588

#SPJ9

The missing particle in the nuclear reaction is a proton, and the balanced equation is: 10/5 B + 4/2 He → 13/7 N + 1/1 H. In the nuclear reaction shown, 10/5 B (Boron-10) and 4/2 He (Helium-4) combine to form a new nucleus 13/7 N (Nitrogen-13).

The mass number (the sum of protons and neutrons) of the reactants is 10 + 4 = 14, and the mass number of the products is 13. This means that a particle with a mass number of 1 (since 14 - 13 = 1) must be emitted during the reaction.

Now, we need to determine what type of particle has a mass number of 1. There are a few possibilities, including a proton (1/1 H), a neutron (1/0 n), or an alpha particle (4/2 He). However, an alpha particle was already involved in the initial reaction and cannot be emitted again.

The most likely particle to be emitted in this case is a proton (1/1 H), which has a mass number of 1 and is commonly emitted in nuclear reactions. Therefore, the missing particle in the reaction is a proton, and the balanced equation is: 10/5 B + 4/2 He → 13/7 N + 1/1 H

To know more about nuclear reaction, refer

https://brainly.com/question/25387647

#SPJ11

the correct value is 9.65 x \(10^-7\) M/s.

The Beer-Lambert law relates the absorbance (A) of a solution to the concentration of the absorbing species (c), the path length (l), and the molar extinction coefficient (ε) of the species:

A = εcl

Rearranging this equation gives:

c = A/(εl)

rate of product formation = Δ[c]/Δt

Substituting the Beer-Lambert equation into this expression gives:

rate of product formation = Δ[A/(εl)]/ΔΔt

the path length and molar extinction coefficient are constant, we can simplify this expression to:

rate of product formation = (1/εl) ΔA/Δt

Substituting the given values into this expression gives:

rate of product formation = (1/6220\(m^-1\) 1 cm) x 0.006 AU/s = 9.65 x \(10^-7\)M/s

Concentration refers to the amount of a solute present in a given amount of solvent or solution. It is typically expressed in units such as molarity (moles of solute per liter of solution), molality (moles of solute per kilogram of solvent), percent by mass or volume, or parts per million (ppm) or billion (ppb). The choice of concentration unit depends on the nature of the solute and solvent, the purpose of the measurement, and the experimental conditions.

Learn more about concentration here:

https://brainly.com/question/10725862

#SPJ4

question:

When the catalyst was at 0.1 mg/mL and the substrate concentration 16 MM, the initial rate of absorbance change was 0.006 absorbance units per second. The measured product has a molar extinction coefficient of 6220 M-1.cm-1, and the path length is the width of a cuvette; 1 cm. Using the information above, can you rearrange the Beer-Lambert equation to convert the absorbance change of rate into a rate of product formation and select the correct value below? Click the VIEW THEORY button for a reminder of the equation.

Answer: C. 1000 Newton

Explanation:

Given that :

Weight of moon rover on earth = 6000 newton

Approximate of moon rover on moon will be?

Weight of an object (W) = mass(m) × acceleration due to gravity(g)

To get the mass of moon rover(m) :

m = weight / acceleration due to gravity

g on earth = 9.8m/s²

Hence,

mass of moon rover = 6000/ 9.8

= 612.244kg

Surface gravity on the moon is about 1.6m/s²

Hence ;

Weight of moon rover on the moon :

Mass of moon rover × 1.6m/s²

= 612.244 × 1.6m/s²

= 979.59 Newton

= 1000 Newton (nearest thousand)

The approximate weight of the Moon Rover on the Moon is 1000 N

The correct answer to the question is Option C. 1000 N

We'll begin by calculating the mass of the Moon Rover. This can be obtained as follow:

Weight (W) = 6000 N

Acceleration due to gravity (g) = 9.8 m/s²

W = m × g

6000 = m × 9.8

m = 6000 / 9.8

Acceleration due to gravity of the moon (g) = 1.67 m/s²

Mass (m) = 612.24 Kg

W = m × g

W = 612.24 × 1.67

Therefore, the approximate weight of the Moon Rover on the Moon is 1000 N

The correct answer to the question is Option C. 1000 N

Learn more: https://brainly.com/question/19540959

The state of Matter in which the  Forces of Attraction is the Weakest is the gaseous state.

The forces of attraction that depends on the intermolecular attractions or the repulsions. The intermolecular repulsions are greater in the gaseous state than the intermolecular forces of attraction. The molecules have the more randomness in the gaseous state as compared to other states. The state of matter that has the least intermolecular forces of the attraction is the gaseous state because of the reason they are in random in the motion.

Thus, in the gaseous state of the matter, the Forces of Attraction the Weakest.

To learn more about forces here

https://brainly.com/question/6958773

#SPJ4

The equation that represents the second ionization energy of nickel is \(\rm Ni+ (g) \rightarrow Ni^2^+ (g) + e-.\)

The energy needed to free the outermost, or least bound, an electron from an element's 1+ ion is known as the second ionization energy.

The second ionization energy of an element is usually greater than the first because positive charge more strongly attracts electrons than negative charge.

The chemical equation is the representation of the chemical reaction. The left side of the substance and compound is the reactant and the right side of the substance is the product.

Nickel is a chemical element. Its chemical symbol is Ni. Its atomic number is 28. It's a silvery luster metal.

Therefore, the equation is \(\rm Ni+ (g) \rightarrow Ni^2^+ (g) + e-.\)

To learn more about second ionization energy, refer to the link:

https://brainly.com/question/11266461

#SPJ5

To calculate the percent yield of the anhydrous sodium carbonate, we need to compare the actual yield (3.65 g) to the theoretical yield of anhydrous sodium carbonate that could be obtained from the 10 g sample of washing soda.

First, we need to calculate the molar mass of the hydrated sodium carbonate (Na2CO3 ∙ 10H2O):

Molar mass of Na2CO3 = 2 * atomic mass of Na + atomic mass of C + 3 * atomic mass of O

                  = 2 * 22.99 g/mol + 12.01 g/mol + 3 * 16.00 g/mol

                  = 105.99 g/mol

Next, we calculate the theoretical yield of anhydrous sodium carbonate:

The molar ratio between hydrated sodium carbonate and anhydrous sodium carbonate is 1:1.

Therefore, the moles of anhydrous sodium carbonate obtained from the 10 g sample of washing soda would be:

moles of Na2CO3 = mass of Na2CO3 / molar mass of Na2CO3

              = 3.65 g / 105.99 g/mol

Finally, we can calculate the percent yield:

percent yield = (actual yield / theoretical yield) * 100

            = (3.65 g / (3.65 g / 105.99 g/mol)) * 100

            = (3.65 g / 3.65 g) * (105.99 g/mol) * 100

            = 105.99 g/mol * 100

           ≈ 105.99 %

Therefore, the percent yield of anhydrous sodium carbonate is approximately 105.99%.

To Learn more about anhydrous sodium carbonate. Click this!

brainly.com/question/11431619

#SPJ11

Answer:

CaCO3 + 2HCl ---> CaCl2 + H2O + CO2

Explanation:

The reaction between solid calcium carbonate and a mineral acid such as aqueous HCl is a neutralization reaction and occurs with the evolution of CO2 gas.

The balanced equation is given below

CaCO3 + 2HCl ---> CaCl2 + H20 + CO2

The product CaCl2 is water soluble which accounts for why the stain is removed, while CO2 gas escapes away from the reaction surface.

Answer:

CaCO3(s) + 2HCl(aq) -------> CaCl2(aq) + 2CO2(g) + H2O(l)

Explanation:

CaCO3(s) + 2HCl(aq) -------> CaCl2(aq) + 2CO2(g) + H2O(l)

When an acid reacts with a metal carbonate a salt, carbon dioxide and water are formed. Hard water usually contain Ca^2+ in the form of Ca(HCO3)2. Minor heating causes CaCO3(calcium carbonate) to deposit on surfaces through which the hard water passes.

Calcium carbonate reacts with acids to produce a calcium salt, water and carbon dioxide: Calcium carbonate + Hydrochloric acid → Calcium chloride + Water + Carbon dioxide. The carbonate radical breaks up into carbon dioxide and oxygen; the oxygen binds with the acid's hydrogen ions to make water; and a solution of calcium chloride remains.