During a reaction, the enthalpy of the reactants and the products are not equal. What does this result in?

A. None of these
B. Absorption or release of energy
C. Change in chemical composition
D. Spin of electrons is reversed

Answers

Answer 1
The answer to this question will be Spin of elections is reversed
Answer 2

The spin of electrons is reversed. Hence, option D is correct.

What is enthalpy?

Enthalpy is the sum of the internal energy. and pressure times volume.

During a reaction, the enthalpy of the reactants and the products are not equal which means the spin of electrons is reversed.

Hence, option D is correct.

Learn more about enthalpy here:

https://brainly.com/question/24170335

#SPJ2


Related Questions

Using distributive property solve 9×19​

Answers

Answer:

9*(10+9)

(90+81)

(171) is the answer

The answer is for this question is 171

There are ___________ forces of attraction between particles in the gas state. Use the following word bank to help you.

Answers

Answer:

Different

Explanation:

Different hope this helps

Why does the ionization energy change when moving down a group of elements?

The number of valence electrons increases.
The nuclear positive charge increases.
The energy levels are increasing.
The attractive force decreases as the atom gets larger.

Answers

Answer:

D) The attractive force decreases as the atom gets larger.

Explanation:

i did the lesson and tried all 3, all 3 times, this was the last one and only choice left so it has to be.

Answer:

The attractive force decreases as the atom gets larger.

Explanation:

The molecular formula for pentyne is
a.c6h6
b.c5h8
c.c5h12
d.c6h14​

Answers

Answer:

B

Explanation:

The molecular formula for pentyne is C5H8

The concentration of 1130+ in a solution is found to be 1.75 X 10-8 M 250C. Find [OH].

Answers

Answer:

[OH] = 6.31 * 10^-7 M

Explanation:

Mathematically;

pH + pOH = 14

Mathematically;

pH = -log [H3O+]

also;

pOH = -log [OH]

From the question; [H3O+] = 1.75 * 10^-8 M

pH = -log [1.75 * 10^-8]

pH = 7.76

since pH is normally given to 1 decimal place

we can say pH = 7.8

Now;

pH + pOH = 14

pOH = 14-7.8

pOH = 6.2

now pOH = -log [OH]

[OH] = -antilog 6.2

[OH] = 6.31 * 10^-7 M

How many significant figures does 5.750 have?

Answers

Answer:

4

Explanation:

A catalyst can only be used once.
True
False

Answers

The question is false

Answer:

False

Explanation:

Catalysts are reusable because they keep the chemical reactions moving without being consumed.

What is the molarity of a solution that contains 6 moles of NaCl in 3 L of solution?

a
2.0 M

b
0.5 M

c
0.25 M

d
18.0 M


Answers

Answer:

a

2.0 M

Explanation:

divide 6by 3

formula :  molarity=moles divided by volume of solutions

How to find the final temperature

Answers

Answer:

The final temperature will be "12.37°".

Explanation:

The given values are:

mass,

m = 0.125 kg

Initial temperature,

c = 22.0°C

Time,

Δt = 4.5 min

As we know,

⇒  [tex]q=mc \Delta t[/tex]

On putting the estimated values, we get

⇒     [tex]=0.125\times 22.0\times 4.5[/tex]

⇒     [tex]=12.37^{\circ}[/tex]

what is the answer to y=1/2-x+1​

Answers

Answer:

X= -Y + 2/2     Y=-X + 3/2

Explanation:

I don't know how to simplify it anymore. You would get x=-y+3/2 and y=-x+3/2

Answer:

Explanation:

(-1/2,1)

Napisz równania reakcji chemicznych w formie cząsteczkowej, jonowej i jonowej skróconej. Podkreśl wzory soli trudno rozpuszczalnych i podaj ich nazwy.


palmitynian potasu + chlorek magnezu


zapis cząsteczkowy reakcji...………………..

zapis jonowy...…………………….

zapis jonowy skrócony...……………….

nazwa soli trudno rozpuszczalnej...……………..


oleinian sodu + azotan (V) wapnia


zapis cząsteczkowy reakcji...………………..

zapis jonowy...…………………….

zapis jonowy skrócony...……………….

nazwa soli trudno rozpuszczalnej...……………..

Answers

Answer:idioma equivocado ????

Explanation:

How are industrial and agricultural pollution similar?

Answers

Answer:

Both of them are polluting the environment. Industrial pollution is the pollution caused from industries and it can be in different forms such as water waster or air pollution. Agricultural pollution is caused from plants or crops that are grown by the farmers. For example, pesticides that may ruin the soil and is dangerous for our environment.

Explanation:

For neap tides, what must the angular alignment be between the sun, earth and moon?

Answers

Answer:

The angular alignment is 90 degrees

Explanation:

The neap tide is a type of tide which occurs around seven days after a spring tide. This type of tide happens twice every month.

The tide is usually moderate and it exists when the sun and moon are usually at right angles to each other when it occurs. A right angle is also known as 90 degrees which validates the tide occurring at an angle 90.

What would heating a sealed glass jar do?
O A. Increase the size of the gas molecules
B. Increase the number of gas molecules
C. Increase the pressure of the gas inside
D. Increase the volume of the gas inside

Answers

The right response is to raise the internal gas pressure. When a sealed glass jar is heated, the temperature of the gas within rises, causing the gas molecules to travel faster and collide with the jar's walls more often and with more force, increasing the gas's pressure.

What is gas molecule?

Gas molecules are made up of atoms that are linked together. These interatomic connections function similarly to springs, connecting atoms of varying masses. This connection vibrates at a constant frequency known as the natural frequency. Atoms, molecules, and/or ions are all present in gases, liquids, and solids, but their behavior varies between the three phases. The graphic below depicts the tiny differences. A gas as seen via a microscope. A gas is a condition of stuff that does not have a set volume or form. Air, water vapor, and helium are examples of gases. A gas is a kind of stuff that does not have a defined volume or shape. To put it another way, a gas takes on the shape and volume of its container.

Here,

The correct answer is Increase the internal gas pressure as When a sealed glass jar is heated, the temperature of the gas within rises, forcing the gas molecules to travel faster and hit with the jar's walls more often and with more force, raising the gas's pressure.

To know more about gas molecule,

https://brainly.com/question/29848914

#SPJ1

-pls help will mark brainliest-

Answers

Answer:

Explanation: d

What is a criterion for all products made using the process of technological design? The product must be cheaper than similar products.

The product must be available to any user who wants it.

The product must solve the problem for which it was designed.

The product must be capable of solving a variety of problems.

Answers

Answer:

C. The product must solve the problem for which it was designed.

Explanation:

Technological design is the study, development and application of technological process with the intent of designing a product to solve required problem.The process could be based on the use of a computer.

Generally, technological process and development always tend to design a problem solver product. Through this process, more new technologies are produced.

Therefore in technological process, the product must solve the problem for which it was designed.

Answer:

C) The product must solve the problem for which it was designed.

Give four differences between rusting and burning​

Answers

Answer:

burning is a rapid process, rustig is a slow process. burning releases light during the process,rusting does not. burning can speed up with addition of more external conditions, rusting cannot be sped up greately by addition of external materials. burning results in release of large amts of heat, rusting very little amt of heat

Hope helped

plesse give a thank

and most brainlest

-Rust happens when something is unpolished and is old. Burning has been modified by heat.

-Burning is a chemical change. Rust is a physical change.

-Burning something cannot be fixed back to its natural form, while when something is rusted it can possibly be re-used and fixed.

-The texture of something burnt is usually fragile and brittle while rust makes (metal for example) gritty.

-Rust usually forms solely on metals while almost anything can be burned.

note: you asked for 4 answers but i gave you 5 in case you didnt like any of them. Hope this helps!

A student places a 12-gram cube of Ice Inside a container. After six hours, the student returns to observe the contents of the container. Which
sentence suggests that the container is an open system?
ОА
The container contains 12 grams of liquid water and no ice.
B.
The container contains 12 grams of Ice and no liquid water.
D.
The container contains 8 grams of liquid water and no ice.
The container contains 8 grams of ice and 4 grams of liquid water.
The container contains 8 grams of liquid water and 4 grams of water vapor.
E

Answers

Answer:

I think its D sorry if im wrong

Answer:i think its D

Explanation:

Lulu Labwrecker carefully pipets 25.0 mL of 0.525 M NaOH into a test tube. She places the test tube into a small beaker to keep it from spilling and then pipets 75.0 mL of 0.355 M HCl into another test tube. When Lulu reaches to put this test tube of acid into the beaker along with test tube of base she accidentally knocks the test tubes together hard enough to break them and their respective contents combine in the bottom of the beaker. Is the solution formed from the contents of the two test tubes acidic or basic? What is the pH of the resulting solution?

Answers

Answer:

The solution formed is acidic

pH = 0.87

Explanation:

The acid-base reaction of NaOH with HCl is:

NaOH + HCl → NaCl + H₂O

Where 1 mole of NaOH reacts with 1 mole of HCl

In the problem, moles of NaOH and HCl are:

NaOH: 0.0250L × (0.525mol / L) = 0.013125 moles NaOH

HCl: 0.0750 × (0.355mol / L) = 0.026625 moles HCl

As moles of HCl > moles NaOH, HCl is in excess and the solution formed is acidic

Moles in excess of HCl are:

0.026625 moles - 0.013125 moles = 0.0135 moles HCl

As the volume of the solutions is 25.0mL + 75.0mL = 100.0mL = 0.100L, molarity of HCl after reaction is:

0.0135 moles HCl / 0.100L = 0.135M HCl = 0.135M H⁺

As pH is defined as - log [H⁺], pH of the solution is:

pH = -log 0.135M H⁺ = 0.87

pH = 0.87

The pH of the resulting solution of the acid and base mixture is; Acidic with a PH = 0.87

We are given;

Volume of NaOH = 25 mL = 0.025 L

Volume of HCl = 75 mL = 0.075 L

Concentration of NaOH = 0.525 M

Concentration of HCl = 0.355 M

Total volume of solution = 0.025 + 0.075 = 0.1 L

Now, the the equation of the reaction is;

HCl + NaOH = NaCl + H2O

We can see that 1 mole of HCl reacts with 1 mole of NaOH.

Since; number of moles = Volume × concentration

Number of moles of HCl = 0.075 × 0.355

Number of moles of HCl = 0.026625 moles

Similarly;

Number of moles of NaOH = 0.025 × 0.525

Number of moles of NaOH = 0.013125 moles

We can see that the number of moles of HCl is greater than that of NaOH and as such there is excess HCl acid in the mix.

Thus,

Excess moles of HCl acid = 0.026625 - 0.013125

Excess moles of HCl acid = 0.0135 moles

Concentration of this excess HCl is gotten by the formula;

M = Excess moles/total volume

M = 0.0135/0.1

M = 0.135 M

PH of this excess concentration is;

PH = -log [H+]

PH = -log [0.135]

PH = 0.87

Read more about PH of resulting solution at; https://brainly.com/question/2378979

what is an example of a soultion

Answers

Answer:

Did you mean solution??

In chemistry, a solution is considered as a special type of homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent.

Eg: sweet tea or coffee (sugar added to solution)

     bleach (sodium hypochlorite dissolved in water)

HOPE IT HELPS :)

H3PO4 + Ca(OH)2 → Ca(H2PO4)2 + H2O

Answers

Given question is incomplete. The complete question is as follows.

Balance the following equation:

[tex]H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + H_2O[/tex]

Answer: The balanced chemical equation is as follows.

[tex]2H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + 2H_2O[/tex]

Explanation:

When a chemical equation contains same number of atoms on both reactant and product side then this equation is known as balanced equation.

For example, [tex]H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + H_2O[/tex]

Number of atoms on reactant side:

H = 5

P = 1

O = 6

Ca = 1

Number of atoms on product side:

H = 6

P = 2

O = 9

Ca = 1

In order to balance this equation, we will multiply [tex]H_3PO_4[/tex] by 2 on reactant side and we will multiply [tex]H_2O[/tex] by 2 on product side. Hence, the balanced chemical equation is as follows.

[tex]2H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + 2H_2O[/tex]

A balloon containing helium gas expands from 230 mL to 860 mL as more helium is added. What was the initial quantity of helium present if the expanded balloon contains 3.8 × 10-4 mol, assuming constant temperature and pressure? Which of the variables are known?

Answers

Answer and Explanation:

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

[tex]pV=nRT\[/tex]

[tex]n=\dfrac{pV}{RT}[/tex]

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

[tex]\dfrac{n_1}{n_2}=\dfrac{\dfrac{p_1V_1}{RT_1}}{\dfrac{p_2V_2}{RT_2}}[/tex]

The statement defines that

[tex]T_1=T_2,~p_1=p_2.[/tex]

Therefore

[tex]\dfrac{n_1}{n_2}=\dfrac{V_1}{V_2}[/tex]

[tex]\dfrac{n_1}{3.8\times10^{-4}}=\dfrac{230}{860}\iff\\\\ n_1=\dfrac{3.8\times10^{-4}\times230}{860}[/tex]

[tex]\boxed{n_1\approx1.0\times10^{-4}~mol}[/tex]

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

Answer:

beginning volume and ending quantity of gas

Explanation:

Can something be an acid and a base? Why and why not​

Answers

Yes h20 can act as an acid or a base depending, if h20 donates a proton it will be a Bronsted lowery acid. If h20 accepts a proton it will be a Bronsted Lowry base. Hope that helps

This formula equation is unbalanced. Pb(NO3)2(aq) + Li2SO4(aq) Right arrow. PbSO4(s) + LiNO3(aq) Which coefficient should appear in front of LiNO3 in the balanced equation? 1 2 3 4

Answers

Answer:2

Explanation:

Answer:

2

Explanation:

what can a criminal do to make the bullet not match the gun hurry plz

Answers

I’m just going to take a wild guess. I guess you could make sure that the gun isn’t registered under your name or make your own bullets without any labeling??

How do you solve this

Answers

Answer:

23.6°C

Explanation:

Step 1:

Data obtained from the question. This include the following:

Mass = 0.125kg = 0.125 x 1000 = 125g

Initial temperature (T1) = 22°C

Heat (Q) generated in 4.5mins = 835J

Specific heat capacity (C) of water = 4.184J/g°C

Change in temperature (ΔT) =?

Final temperature (T2) =?

Step 2:

Determination of the change in temperature, ΔT of water.

This can be obtained as shown below:

Q = MCΔT

835 = 125 x 4.184 x ΔT

Divide both side by 125 x 4.184

ΔT = 835 / (125 x 4.184)

ΔT = 1.6°C

Therefore, the change in temperature, ΔT is 1.6°C

Step 3:

Determination of the final temperature of water.

This can be obtained as follow:

Initial temperature (T1) = 22°C

Change in temperature (ΔT) = 1.6°C

Final temperature (T2) =?

Change in temperature (ΔT) = Initial temperature – Final temperature

ΔT = T2 – T1

1.6 = T2 – 22

Collect like terms

T2 = 1.6 + 22

T2 = 23.6°C

Therefore, the final temperature of the water is 23.6°C.

What type of mixture is fog?
O A. A homogenous mixture of a solid in a gas
B. A heterogeneous mixture of a liquid in a gas
C. A homogenous mixture of a liquid in a gas
D. A heterogeneous mixture of a solid in a gas

Answers

Answer:

. A homogeneous mixture of a solid in a gas

Consider the incomplete reaction below.

NaOH + X Right arrow. NaCH3COO + H2O

What is X in this reaction?
NH4OH
H3PO4
H2CO3
CH3COOH

Answers

A chemical  reaction involves the interaction of reactants. The substance X ,must be an acid and in this case is CH3COOH

What is a reaction?

In chemistry, a reaction is said to occur when substances interact in such a way that other new substances are formed.

Now let us look at the particular reaction; NaOH + X ----> NaCH3COO + H2O. The substance X must be an acid. Hence, the most likely susbstance is CH3COOH.

Learn more about reaction: https://brainly.com/question/22817140

How are ancient CO2 levels measured?

Answers

Answer:

Ancient CO₂ levels can be measured from

1) Air bubbles trapped in deep ancient ice cores (up to 800,000 years ago) or

2) Tree rings (up to 10,000 years ago)

Explanation:

The percentages of CO₂ concentration in the atmosphere from previous or ancient times are found by analyzing the CO₂ content in trapped air located in the deep ancient ice cores present in Antarctica and Greenland such as the EPICA Dome C cores

As the ice is drilled though, the air released from trapped bubbles are captured for analysis and the time frame for the captured bubbles can date back up to 800,000 years

Ancient CO₂ levels can also be measured from tree rings which provide ancient CO₂ levels up to 10,000 years

Balance the equation.

SiO2 +
CaC2 →
Si +
CaO +
CO2

Answers

Co2 is oxygen because that what you took to ask ppl for

Answer:

5SiO[tex]_{2}[/tex] + 2CaC[tex]_{2}[/tex] → 5Si + 2CaO + 4CO[tex]_{2}[/tex]

5   2   5   2   4  are your answers.

Other Questions
What is the the poem beowulf? Is (1, 4) a solution to the equation y = 7x? Pernyataan berikut yang benar adalah ....A. Garis bagi membagi sisi menjadi dua sama panjangB. Garis bagi membagi sudut menjadi dua sama besarC. Garis berat membagi sudut menjadi dua sama besarD. Garis tinggi membagi sudut menjadi dua sama besar Can someone please help me with this question please:( While studying for a history exam, Michael finds it easier to recall details if he creates a mental picture relating to the information he is reviewing. What memory strategy is he using PLZ PLZ HELP ME I NEED THIS FOR ONE OF MY FIANLE ASSIGNMENTS OF THE YEAR AND WHOEVER ANSWERS CORRECTLY WILL GET BRAINLEST What is the normal boiling point of of a solution containing 64.5g of non volatile quinoline ( MW 129 ) in 500 g of benzene when the normal boiling point is 80.10 and KB = 2.50 Write a personal narrative about a hero in your life. An iron nail with a mass of 12 grams absorbs 12 Joules of heat. If the nail was initially at 25C, what is the final temperature? Find the area of the parallelogram. write the sum using sigma notation 3^2+4^2+5^2+...+10^2 The trial balance of Rachel Company at the end of its fiscal year, August 31, 2017, includes these accounts: Inventory $29,200; Purchases $144,000; Sales Revenue $190,000; Freight-In $8,000; Sales Returns and Allowances $3,000; Freight-Out $1,000; and Purchases Returns and Allowances $5,000. The ending inventory is $25,000. Prepare a cost of goods sold section for the year ending August 31. What is an advantage of telling a story from a first-person point of view?A. Conveying each story event in the most realistic and concrete waypossibleB. Showing multiple characters' perspectives on the same event orsituationC. Avoiding common pitfalls in story writing, such as telling ratherthan showingD. Creating suspense by limiting the reader's perspective on thestory's events Suppose that Congress passes a law requiring employers to provide employees some benefit (such as healthcare) that raises the cost of an employee by $4 per hour. Assume that firms were not providing such benefits prior to the legislation. On the following graph, use the green line (triangle symbol) to show the effect this employer mandate has on the demand for labor.On the previous graph, use the purple line (diamond symbol) to show the effect this employer mandate has on the supply of labor. Suppose the wage is free to balance supply and demand. Use the black point (plus symbol) to indicate the equilibrium wage and level of employment before this law, and use the grey point (star symbol) to indicate the equilibrium wage and level of employment after this law is implemented. True or False: Employers and employees are made worse off by this law. True False Suppose that, before the mandate, the wage in this market was $3 above the minimum wage. In this case, the employer mandate will decrease the equilibrium wage rate from $10 per hour to $6 per hour, causing employment to increase V and unemployment to decrease 'V' . Now suppose that workers do not value the mandated benefit at all. Which of the following statements are true under this circumstance?1. The wage rate will decline by less than $4. 2. Employers are worse off than before the mandated benefit. 3. The equilibrium quantity of labor will decline. 4. The supply curve of labor doesn't shift at all. 5. Employees are worse off than before the mandated benefit. can someone answer number 10 and show the work? I really need it please Can anyone pls tell me the time in: U.S.A , India , Dubai , London. If u are right, You will get a Whopping 15 points. 1. Nazi Germany was a 'police state.' What does this mean? A study was conducted on the amount of time drivers wait for a stoplight to change at a particular intersection. The amount of time spent by 300 drivers was recorded and the resulting data were used to create boxplot.a. What is approximately the median amount of time spent at this traffic light? b. The top 25% of drivers waited at least how long? c. The mean amount of time spent at this traffic light was bigger or smaller than the median? Explain. Which story premise is the best example of magical realism?O A. At the battle of the bands, the Lizards face off against UraniumNightmare.O B. Bo discovers the lost city of Atlantis but can't find a gas stationanywhere.O C. A wizard plunders an ancient dungeon for the secret of how totame dragons.D. Aliens from outer space invade Earth, and only Capybara Man canstop them. Find the area of a circle with radius, r = 5.7m.Give your answer rounded to 2 DP.The diagram is not drawn to scale.(I attached the diagram below!)