Use the following equation to answer the questions below:

Be + 2HCl → BeCl2 + H2

Answers are rounded.. pick the closest to your answer.

What is the mass of beryllium required to produce 25.0g of beryllium chloride? g

What is the mass of hydrochloric acid required to produce 25.0g of beryllium chloride? g

What is the mass of hydrogen gas produced when 25.0g of beryllium chloride is also produced? g

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:

I think it would be A honestly...

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.

Answer:the opposite charge attracts like magnets

Explanation:

I believe the answer is Ribosome

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:

0.0532 M

Explanation:

Just did the test :)

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:

4. electrical

Explanation:

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

Answer:

The correct answer is h20

Explanation:

i got it right on an exam.

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:

its a polymer

Explanation:

Answer:

the answer of the question is =ch4+2o2

Answer:

A. p(H) = 2.0506

B. p(H) = 7.0969

Explanation:

A.

p(H)= -log[H+]

p(H)= -log(8.9×10^-3)

p(H) = 2.0506

B.

p(H)= -log[H+]

p(H)= -log(8×10^-8)

p(H) = 7.0969

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:

no idea with the answer pls check with otherr

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:

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.

D. 62.8 J

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Thermodynamics

Specific Heat Formula: q = mcΔT

Step 1: Define

[Given] m = 0.750 g

[Given] c = 4.186 J/g °C

[Given] ΔT = 40.0 °C - 20.0 °C = 20.0 °C

[Solve] q

Step 2: Solve

Step 3: Check

Follow sig fig rules and round. We are given 3 sig figs.

62.79 J ≈ 62.8 J

Answer:

D.  The reaction described by curve B is occurring with a catalyst.

Explanation:

The peak in the curve is the activation energy.  According to this graph, the activation energy was lowered.  A catalyst is what you can use to lower the activation energy.

The most likely accounts for the difference between curve A and curve B on the energy diagram is the reaction described by curve B is occurring with a catalyst,  therefore  option (d) is correct.

A catalyst is a chemical substance which alters the rate of a reaction without itself undergoing any permanent chemical change.

A catalyst does not initiate a chemical reaction. A catalyst does not be consumed in the reaction.

Catalysts tend to react with reactants to form intermediates and at the same time facilitate the production of the final reaction product. After the whole process, a catalyst can regenerate.

Catalysts encourage molecules to react and make the whole reaction process easier and efficient.

The most likely accounts for the difference between curve A and curve B on the energy diagram is the reaction described by curve B is occurring with a catalyst,  ,hence option (d) is correct.

Learn more about catalyst ,here:
https://brainly.com/question/1565029

#SPJ5

Answer:

Van der Waals forces

Explanation:

Answer:

Dispersion

Explanation:

They said it was the answer.

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:

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: 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:

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:

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:

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