PLEASE HELP :(
What most likely accounts for the difference between curve A and curve B on
the energy diagram?
A. The reaction described by curve B is under greater pressure.
B. The reaction described by curve B is at a different temperature.
C. The reaction described by curve B has higher reactant
concentrations.
D. The reaction described by curve B is occurring with a catalyst.

Answer:

20.93 g

Explanation:

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

Heat (Q) = 3.5 KJ

Initial temperature (T₁) = 26°C

Final temperature (T₂) = 66°C

Mass (M) =?

Next, we shall convert 3.5 KJ to J. This can be obtained as follow:

1 KJ = 1000 J

Therefore,

3.5 KJ = 3.5 KJ × 1000 J / 1 KJ

3.5 KJ = 3500 J

Next, we shall determine the change in the temperature of the water. This is illustrated:

Initial temperature (T₁) = 26°C

Final temperature (T₂) = 66°C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 66 – 26

ΔT = 40 °C

Finally, we shall determine the mass of the water. This can be obtained as follow:

Heat (Q) = 3500 J

Change in temperature (ΔT) = 40 °C

Specific heat capacity (C) = 4.18 J/gºC

Mass (M) =?

Q = MCΔT

3500 = M × 4.18 × 40

3500 = M × 167.2

Divide both side by 167.2

M = 3500 / 167.2

M = 20.93 g

Therefore, the mass of the water is 20.93 g

Answer:

7.2 mol * (6.02*10^23)= 4.3*10^24 atoms

Explanation:

The number of atoms in one mole of chlorine contains 6.022 × 10²³ . Therefore the number of Cl atoms in 7.2 moles is 4.3 × 10²⁴.

One mole of every substance contains 6.022 × 10²³ atoms. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.

Chlorine is 17th element in periodic table. Cl is a non-metal with high electronegativity. The atomic mass of Cl is 35.5 g. Thus, 35.5 g contains Avogadro number of Cl atoms.

One mole of Cl contains  6.022 × 10²³  atoms. Tus, number of atoms in 7.2 mol is Avogadro number times the number of moles.

no.of atoms =  6.022 × 10²³  × 7.2 =  4.3 × 10²⁴ atoms.

Therefore, 7.2 moles of Cl contains 4.3 × 10²⁴ atoms.

Find more on Avogadro number:

https://brainly.com/question/11907018

#SPJ2

Answer:

B. Ice crystals melt as they fall through a layer of warm air and then refreeze into a solid form as they fall.

Explanation:

Answer:B

Explanation:

Answer:

both

Explanation:

plants have mitochondria and can preform cellular respiration

animals and plants use oxygen in respiration to produce corbon dioxide

Answer:

I think it's both.

Explanation:

I just looked it up, so yeah.

Answer:

HBr > HCl > H2S > BH3

Explanation:

In many acids, the magnitude of electronegativity of the nonmetal determines the strength of the acid. The less electronegative the non-metal is, the stronger the acidity of the acid.

This is because the less electronegative the nonmetal is, the more easily the H-X bond is broken since it is longer and weaker.

This explains the order of acid strength shown in the answer above.

Answer:

I think it would be A honestly...

Answer:

B) 16 g

Explanation:

First we convert 4 moles of O₂ into moles of H₂, using the stoichiometric coefficients of the balanced reaction:

Finally we convert 8 moles of H₂ into grams, using its molar mass:

Thus, the correct answer is option B).

Answer:

lol i know this isnt the best but Your comic strip can be about how when you put smores in a campfire, the smores become burnt  that is example of energy transfer because energy is traveling as heat to another object.

Explanation:

Answer:

hopefully this helps is not i have more just let me know

Explanation: #1 Identify the colligative property.

A) vapor pressure lowering

B) freezing point depression

C) boiling point elevation

D) osmotic pressure

E) all of the above

#2 ________ is applied to roads in wintertime so that the ice will melt at a lower temperature.

A) Antifreeze

B) Water

C) Salt

D) Sugar

E) Oil

#3 Give the reason that antifreeze is added to a car radiator.

A) The freezing point is lowered and the boiling point is elevated.

B) The freezing point is elevated and the boiling point is lowered.

C) The freezing point and the boiling point are elevated.

D) The freezing point and the boiling point are lowered.

E) None of the above.

4# Place the following aqueous solutions of nonvolatile, nonionic compounds in order of decreasing osmotic pressure.

I. 0.011 M sucrose

II. 0.00095 M galactose

III. 0.0060 M glycerin

A) I > III > II

B) I > II > III

C) II > III > I

D) III > I > II

E) II > I > III

Answer:

Nuclear fushion

Explanation:

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons

Answer:

mechanical energy

hope it helps and your day will be full of happiness

Answer:

Two properties of heating metal

1.high melting points.

2.malleable

What is meant by synthetic?

1.made of artificial material, not natural items, synthetic is made up of chemical synthesis. (synthetic compound, synthetic drug, synthetic material)

Explanation:

1.They are solid (with the exception of mercury, Hg, a liquid).

2 They are malleable (they can be easily hammered into very thin sheets).

Answer:

0.0532 M

Explanation:

Just did the test :)

I believe the answer is Ribosome

Answer:

Nose

Explanation:

Because every time I touch it's nose, it will hide itself into the shell faster than other places

Hi!the main weakness of the tortoise is it's shell.The most shell of tortoise are so hard that most animals can't even make a scratch on it But flip one over and getting up will be a huge problem. They can suffer from dehydration or get picked off by predators. And even though reptiles are sun loving, they still can't regulate their body temperature and this could lead to over heating and death.

Answer:

no idea with the answer pls check with otherr

Answer:

The correct answer is h20

Explanation:

i got it right on an exam.

Answer:

4. electrical

Explanation:

The answer is electrical let me know if it's right

Answer:

Van der Waals forces

Explanation:

Answer:

Dispersion

Explanation:

They said it was the answer.

Answer:

its a polymer

Explanation:

Answer:

0.046 mol

Explanation:

Step 1: Write the balanced equation

Fe₂O₃ + 2 Al ⇒ 2 Fe + Al₂O₃

Step 2: Calculate the moles corresponding to 3.6 g of Fe₂O₃

The molar mass of Fe₂O₃ is 159.69 g/mol.

3.6 g × 1 mol/159.69 g = 0.023 mol

Step 3: Calculate the moles of Fe produced from 0.023 moles of Fe₂O₃

The molar ratio of Fe₂O₃ to Fe is 1:2.

0.023 mol  Fe₂O₃ × 2 mol Fe/1 mol Fe₂O₃ = 0.046 mol Fe

Answer:

the answer of the question is =ch4+2o2

Answer:

20.9grams

Explanation:

Using the formula:

Q = m × c × ∆T

Where;

Q = amount of heat (joules)

m = mass of substance (g)

c = specific heat of water (4.184 J/g°C)

∆T = change in temperature (°C)

According to the provided information;

Q = 3.5kJ = 3.5 × 1000 = 3500J

m = ?

c of water = 4.184 J/g°C

∆T = 66°C - 26°C = 40°C

Using Q = m × c × ∆T

m = Q ÷ (c × ∆T)

m = 3500 ÷ (4.184 × 40)

m = 3500 ÷ 167.36

m = 20.9

mass = 20.9grams

Answer:

0.263 mole of NaOH

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

2Na + 2H₂O —> 2NaOH + H₂

From the balanced equation above,

2 moles of Na reacted to produce 2 moles NaOH.

Finally, we shall determine the number of mole of NaOH produced by the reaction of 0.263 mole sodium, Na. This can be obtained as follow:

From the balanced equation above,

2 moles of Na reacted to produce 2 moles NaOH.

Therefore, 0.263 mole of Na will also react to produce 0.263 mole of NaOH.

Thus, 0.263 mole of NaOH was obtained from the reaction.

Answer:

k₂ = 5 x 10⁻² s⁻¹

Explanation:

Using the Clausis - Clapyron Equation ...

ln(k₁/k₂) = ΔH/R(T₁-T₂/T₁·T₂) => lnk₂ = lnk₁ + ΔH/R(T₁-T₂/T₁·T₂)

k₁ = 6.4 x 10⁻³s⁻¹

ΔH = 33.6 Kj/mole

R = 0.008314 Kj/mol·K

T₁ = 25°C = 298K

T₂ = 75°C = 348K

lnk₂ = ln(6.4 x 10⁻³s⁻¹) + (33.6kj/mol·K/0.008314Kj/mol·K)·[(348K - 298K)/(348K)(298K)] = -3.10s⁻¹

k₂ at 75°C = exp(-3.10) = 5 x 10⁻²s⁻¹ (faster k-value at higher temp)

Answer: The energy of a mole of photon associated with this frequency is [tex]49.5\times 10^{-20}J[/tex]

Explanation:

The energy and frequency are related by :

[tex]E=N\times h\times \nu[/tex]

E = energy of photon

N = number of moles = 1

h = planks constant = [tex]6.6\times 10^{-34}Js[/tex]

[tex]\nu[/tex] = frequency = [tex]7.5\times 10^{14}Hz[/tex]

[tex]E=1\times 6.6\times 10^{-34}Js\times 7.5\times 10^{14}s^{-1}=49.5\times 10^{-20}J[/tex]

The energy of a mole of photon associated with this frequency is [tex]49.5\times 10^{-20}J[/tex]

Answer: The coefficient for water after the equation is balanced is 2.

Explanation:

The balanced chemical equation must have same charge and same number of atoms on both sides of the equation.

As the given reaction is a redox recation occuring in acidic medium.

[tex]HNO_3+3Fe^{2+}+3H^+\rightarrow NO+3Fe^{3+}+2H_2O[/tex]

The coefficient for water will be 2 after the equation is balanced.