1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dezoksy [38]
2 years ago
10

Magnesium oxidizes via the reaction: 2 Mg + O2 → 2 MgO The reaction has a △Hrxn = -1203 kJ. How much heat (in kJ) is released wh

en you completely react 3.000 moles of O2?
Chemistry
1 answer:
Juli2301 [7.4K]2 years ago
3 0

Answer : The amount of heat released is, -3609 KJ

Solution : Given,

Enthalpy of reaction, \Delta H_{rxn} = -1230 KJ

Moles of O_2 = 3 moles

The given balanced reaction is,

Mg+O_2\rightarrow 2MgO

From the balanced reaction we conclude that

1 mole of O_2 releases heat = -1230 KJ

3 moles of O_2 releases heat = \frac{3moles}{1mole}\times -1230KJ=-3609KJ

Therefore, the amount of heat released is, -3609 KJ

You might be interested in
How did Ernest Rutherford's experiment relate to J.J. Thomson's work?
olasank [31]

Answer:

D

Explanation:

I am sorry if wrong

4 0
3 years ago
What is the name of the compound with the formula NaOH ?
vladimir2022 [97]

Answer:

Sodium hydroxide

Explanation:

Sodium hydroxide ( NaOH ) -

Sodium hydroxide is an inorganic compound , and is also called caustic soda and lye .

It is an ionic compound , which is white in color and is in solid state .

The cation and anion of this salt are the sodium cation Na⁺  and the hydroxide anions OH⁻ .

<u>It is highly basic in nature and is soluble in water , and when left open in air it can readily absorb moisture from the air , to form a hydrated sodium hydroxide .</u>

4 0
3 years ago
What is a temperature scale used by scienctist?
laila [671]
To measure the kinetic engery  from the inside and outside of something to be able to tell how hot or coll something is.. without touching it also
3 0
3 years ago
A well-insulated cup of water is too hot to make tea, so you mixed it with an equal amount of cool water to lower the temperatur
natulia [17]

Answer:

The entropy of the final solution decreases, as the reaction disorder is less.

Explanation:

The higher the temperature, the greater the heat of the reaction and the greater the disorder it has, so the entropy will increase ... But this is not the case, since the solution cools, decreasing the entropy proportionally.

4 0
3 years ago
2.Which of the alcohols listed below would you expect to react most rapidly with PBr3?A)CH3CH2CH2CH2CH2CH2OHB)(CH3CH2)2CH(OH)CH2
Gnoma [55]

Answer:

A) CH3CH2CH2CH2CH2CH2OH

Explanation:

For this question, we have the following answer options:

A) CH3CH2CH2CH2CH2CH2OH

B) (CH3CH2)2CH(OH)CH2CH3

C) (CH3CH2)2CHOHCH3

D) (CH3CH2)3COH

E) (CH3CH2)2C(CH3)OH

We have to remember the<u> reaction mechanism</u> of the substitution reaction with PBr_3. <em>The idea is to generate a better leaving group in order to add a "Br" atom.</em>

The PBr_3 attacks the "OH" generation new a bond to P (O-P bonds are very strong), due to this new bond we will have a better leaving group that can remove the oxygen an allow the attack of the Br atom to generating a new C-Br bond. This is made by an <u>Sn2 reaction</u>. Therefore we will have a faster reaction with <u>primary substrates</u>. In this case, the only primary substrate is molecule A. So, <em>"CH3CH2CH2CH2CH2CH2OH"</em> will react faster.

See figure 1

I hope it helps!

7 0
3 years ago
Other questions:
  • Which absolute magnitude rating would be the dullest?<br><br> -6<br><br> 0<br><br> +2<br><br> -1
    12·1 answer
  • Part D
    8·1 answer
  • Date a rock using half life
    14·1 answer
  • Which formula equation represents the burning of sulfur to produce sulfur dioxide?
    6·1 answer
  • 3. What determines the mass number of an element?<br> The mumhor of nrotons
    7·2 answers
  • A general chemistry student found a chunk of metal in the basement of a friend's house. To figure out what it was, she tried the
    9·2 answers
  • What is the pH of a solution with a 2.20 x 10-8 M hydroxide ion concentration
    6·1 answer
  • A researcher discovers a new bacterium that lives on the seafloor near hydrothermal vents. This organism reduces CO2 to form C6H
    8·1 answer
  • How many molecules are there in 5.9 moles of NaCl?
    6·1 answer
  • How much energy is lost to condense 300. grams of steam at 100.C?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!