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
Vera_Pavlovna [14]
3 years ago
9

Savvas Realize. Investigation 8 Experiment 1

Chemistry
1 answer:
lara31 [8.8K]3 years ago
7 0

Answer:

–1065.25 KJ of energy.

Explanation:

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

4FeO + O₂ —> 2Fe₂O₃  ΔH = –560.66 kJ

From the balanced equation above,

The formation of 2 moles of Fe₂O₃ released –560.66 kJ of energy.

Finally, we shall determine the amount of heat energy released when 3.8 moles of Fe₂O₃ are produced. This can be obtained as follow:

From the balanced equation above,

The formation of 2 moles of Fe₂O₃ released –560.66 kJ of energy.

Therefore, the formation of 3.8 moles of Fe₂O₃ will release

= (3.8 × –560.66)/2 = –1065.25 KJ of energy.

Thus, –1065.25 KJ of energy is released from the reaction.

You might be interested in
. Given the reaction 2HgO → 2Hg + O2 , how many moles of elemental mercury will be obtained by the decomposition of 1 mole of Hg
AveGali [126]

Answer:

one mole of HgO will give one mole of Hg.

Explanation:

Given data:

Moles of HgO = 1 mol

Moles of Hg = ?

Solution:

Chemical equation:

2HgO → 2Hg + O₂

Now we will compare the moles of Hg with HgO from balance chemical equation.

                  HgO   :     Hg

                    2       :      2

                     1       :      2/2×1 = 1 mol

So, one mole of HgO will give one mole of Hg.

6 0
3 years ago
How to know if you can heat a laboratory flask and other glassware?
AnnyKZ [126]

Answer:

fill the flask with water. apply heat, when you see the vapor you will know is heat

7 0
3 years ago
g You observed the formation of several precipitates in the Reactions in Solution lab exercise. Identify the precipitate in each
RUDIKE [14]

<u>Answer:</u>

<u>For a:</u> Lead iodide is a yellow precipitate.

<u>For b:</u> Barium sulfate is a white precipitate.

<u>For c:</u> Ferric hydroxide is a brown precipitate.

<u>For d:</u> Copper (II) hydroxide is a blue precipitate.

<u>Explanation:</u>

Precipitation reaction is defined as the reaction where a solid precipitate (solid substance) is formed at the end of the reaction. It is insoluble in water.

For the given options:

  • <u>For (a):</u>

The chemical reaction between KI and lead (II) nitrate follows:

2KI(aq)+Pb(NO_3)_2(aq)\rightarrow PbI_2(s)+2KNO_3(aq)

The iodide of lead is generally insoluble in water. Thus, lead iodide is a yellow precipitate.

  • <u>For b:</u>

The chemical reaction between barium chloride and sulfuric acid follows:

BaCl_2(aq)+H_2SO_4(aq)\rightarrow BaSO_4(s)+2HCl(aq)

The sulfate of barium is insoluble in water. Thus, barium sulfate is a white precipitate.

  • <u>For c:</u>

The chemical reaction between NaOH and ferric chloride follows:

3NaOH(aq)+FeCl_3(aq)\rightarrow Fe(OH)_3(s)+3NaCl(aq)

The hydroxide of iron is insoluble in water. Thus, ferric hydroxide is a brown precipitate.

  • <u>For d:</u>

The chemical reaction between NaOH and copper sulfate follows:

CuSO_4+2NaOH\rightarrow Cu(OH)_2+Na_2SO_4

The hydroxide of copper is insoluble in water. Thus, copper (II) hydroxide is a blue precipitate.

6 0
3 years ago
Use the bond energies provided to estimate ΔH°rxn for the reaction below. CH3OH(l) + 2 O2(g) → CO2(g) + 2 H2O(g) ΔH°rxn = ? Bond
Temka [501]

Answer:

um la cookie on a bar was a waste of color with climax of gdhel of

8 0
3 years ago
Read 2 more answers
Used in kitchen utensils. <br><br>what is this MNMULUAI​
Gnesinka [82]

Answer:

the best person to whom it may be able or chulbul the same day of Ch-2 Ch-4 book exercise in a great day and I will join you for your voice is not coming to the same day

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which words from the article help the reader to understand the importance of a special habitat?
    13·2 answers
  • Which statement describes the formation of a nebula? (35 points)
    9·1 answer
  • Photosynthesis transfers electrons from water to carbon dioxide molecules. Why is this electron transfer called an oxidation red
    8·1 answer
  • Which properties describe water? strong surface tension, weak surface tension, denser as a solid, denser as a liquid, nonpolar,
    5·1 answer
  • Does water have greater heat of fusion or greater heat of vaporization?
    5·1 answer
  • What is the answer? Please
    5·2 answers
  • SI units is an improved version of MKS system.
    12·1 answer
  • PLS SOMONE PLS FILL OUT I WILL GIVE BRAINLIEST HURRYYY
    5·1 answer
  • Someone please helpppp!!!!!!Question 7
    12·1 answer
  • What is the hydronium ion concentration of a solution whose pH is 4.12?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!