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
olga nikolaevna [1]
3 years ago
11

Which of the following equations is balanced?

Chemistry
1 answer:
wolverine [178]3 years ago
3 0

Answer:

The equation in option D is balanced

D) 8CO2 + 3S8 → 8CS2 + 8SO2

Explanation:

A) Pb(NO3)2 + FeCl3 → Fe(NO3)3 + PbCl2

⇒ This equation is <u>NOT balanced</u>

⇒ On the left side we have 3x Cl, while on the right side we have 2x Cl. To balance the amount of Cl on both sides we have to multiply FeCl3 (on the left side) by 2 and PbCl2 (on the right side) by 3

Pb(NO3)2 + 2FeCl3 → Fe(NO3)3 + 3PbCl2

⇒ now we have 2x Fe on the left side and 1x Fe on the right side. To balance the amount of Fe on both sides, we have to multiply Fe(NO3)3 (on the right side) by 2

Pb(NO3)2 + 2FeCl3 → 2Fe(NO3)3 + 3PbCl2

⇒ On the left we have 1x Pb , on the right side we have 3x Pb. To balance the amount of Pb on both sides we have to multiply Pb(NO3)2 (on the left side) by 3. Now the equation is balanced.

3Pb(NO3)2 + 2FeCl3 → 2Fe(NO3)3 + 3PbCl2

B) C3H5(NO3)3 → CO2 + H2O + N2 + O2

⇒ This equation is NOT balanced

⇒ On the left side we have 5x H, on the right side we have 2x H. To balance the amount of H on both sides we have to multiply C3H5(NO3)3 (on the left side) by 2 and H2O (on the right side) by 5

2C3H5(NO3)3 → CO2 + 5H2O + N2 + O2

⇒ On the left side we have 6x C, on the right side we have 1xC

To balance the amount of C on both sides we have to multiply CO2 (on the right side) by 6.

2C3H5(NO3)3 → 6CO2 + 5H2O + N2 + O2

⇒ On the left side we have 6x N, on the right side we have 2N

To balance the amount of N on both sides we have to multiply N2 (on the right side) by 3

.

2C3H5(NO3)3 → 6CO2 + 5H2O + 3N2 + O2

⇒ Now we have 18x O on the left side and 19x O on the right side

To balance the amount of O we should multiply 2C3H5(NO3)3 (on the left side) by 2 and multiply  6CO2 + 5H2O + 3N2 (on the right side) each by 2.

Now the equation is balanced.

4C3H5(NO3)3 → 12CO2 + 10H2O + 6N2 + O2

C) Fe2O3(s) + C(s) → Fe(S) + CO2(g)

⇒ This equation is NOT balanced

⇒ On the left side we have 2x Fe, on the right side we have 1x Fe. To balance the amount of Fe on both sides, we have to multiply Fe (on the right side) by 2

Fe2O3(s) + C(s) →2Fe(S) + CO2(g)

⇒ On the left side we have 3x O, on the right side we have 2x O

To balance the amount of O on both sides. we have to mulitply Fe2O3 (on the left side) by 2 and CO2 (on the right side) by 3. Then we see that we have 4x Fe on the left side, so we have to multiply 2FE (on the right side) by 2 as well.

2 Fe2O3(s) + C(s) → 4Fe(S) + 3CO2(g)

⇒ On the right side we 3x C, on the left side we have 1x C. To balance the amount of C on both sides, we have to multiply C (on the left side) by 3. Now the equation is balanced.

2 Fe2O3(s) + 3C(s) → 4Fe(S) + 3CO2(g)

D) 8CO2 + 3S8 → 8CS2 + 8SO2

⇒ This equation is balanced !

You might be interested in
How many grams of sodium hydroxide are needed to make 500mLs of a 0.125M NaOH solution?
zubka84 [21]
Hope this helps you.

8 0
3 years ago
Calculate the average velocity of nitogen molecule at STP<br>​
JulijaS [17]

Answer:

Nitrogen molecule is 28 neuclons×1.67×10-27 kg/nucleon = 4.68 д 10-26 kg. So the average speed of a gas molecule is about 500 m/sec. This is roughly the speed of sound in a gas 340 m/sec. So the average kinetic energy of the gas molecules is related to the temperature of the gas.

I hope this is helpful

4 0
3 years ago
The element Europium exists in nature as two isotopes: 151Eu, which has a mass of 150.9196amu, and 153Eu, which has a mass of 15
Juliette [100K]

Answer:151 Eu= 48.01%

152 Eu= 51.99%

Explanation:

4 0
3 years ago
Ammonia, nh3, is a weak base with a kb = 1.8 x 10-5. in a 0.8m solution of ammonia, which has a higher concentration: ammonia (n
insens350 [35]
Answer is: concentration ammonia is higher than concentration of ammonium ion.
Chemical reaction of ammonia in water: NH₃ + H₂O → NH₄⁺ + OH⁻.
Kb(NH₃) = 1,8·10⁻⁵.
c₀(NH₃) = 0,8 mol/L.
c(NH₄⁺) = c(OH⁻) = x.
c(NH₃) = 0,8 mol/L - x.
Kb = c(NH₄⁺) · c(OH⁻) / c(NH₃).
0,000018 = x² /  0,8 mol/L - x.
solve quadratic equation: x = c(NH₄⁺) = 3,79·10⁻³ mol/L.
7 0
3 years ago
How does cellular respiration identify as a combustion reaction?
Aleksandr-060686 [28]

reactions to break down glucose using oxygen to produce carbon dioxide, water and energy in the form of ATP. ... To balance the oxygen atoms for the reactant side, you need to count 6 atoms from the glucose.

7 0
3 years ago
Other questions:
  • Which of the following could not happen to an igneous rock?
    14·1 answer
  • Hand lotion is what kind of mixture?
    9·1 answer
  • Which volcanoes are located along colliding plate boundaries
    6·1 answer
  • What does vinegar do to eggs
    5·1 answer
  • A) Calculate the molar mass of ethanol, C2H5OH and water, H20.<br> C2H5OH =<br> H2O =<br> I
    9·1 answer
  • Give examples to three solutions you commonly use and identify the solvent and solutes that make it each up.
    8·2 answers
  • Which diagram shows the correct direction of electron flow in an electrolytic cell?
    13·1 answer
  • How many atoms are there in 48 grams of carbon?
    14·1 answer
  • different energy sources can be used to generate electricity which of the following use a renewable energy resource to generate
    8·1 answer
  • Thermal energy can be transformed to do work .<br> true<br> false
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!