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
Flauer [41]
3 years ago
7

Manganese metal can be prepared by the thermite process: 4Al(s) . 3MnO2(s). -->. 3Mn(l). 2Al2O3(s) molar masses, in g/mol: 26

.98. 86.94 54.94 101.96 If 203 g of Al and 472 g of MnO2 are mixed, which is the limiting reactant?
Chemistry
1 answer:
nordsb [41]3 years ago
3 0

Answer:

MnO2 is the limiting reactant

Explanation:

Step 1:

The balanced equation for the reaction. This is given below:

4Al(s) + 3MnO2(s) —> 3Mn(l) + 2Al2O3(s)

Step 2:

Determination of the masses of Al and MnO2 that reacted from the balanced equation. This is illustrated below:

Molar Mass of Al = 26.98g/mol

Mass of Al from the balanced equation = 4 x 26.98 = 107.92g

Molar Mass of MnO2 = 86.94g/mol

Mass of MnO2 from the balanced equation = 3 x 86.94 = 260.82g

From the balanced equation above,

107.92g of Al reacted with 260.82g of MnO2 reacted.

Step 3:

Determination of the limiting reactant. This is illustrated below:

Let us consider using all the 203g of Al given to verify if there will be any leftover for MnO2. This is illustrated below:

From the balanced equation above,

107.92g of Al reacted with 260.82g of MnO2,

Therefore, 203g of Al will react with = (203 x 260.82)/107.92 = 490.61g of MnO2.

We can see that the mass of MnO2 that will react with 203g of Al is 490.61g which far greater than the 472g that was given. Therefore, it is not acceptable.

Now let us consider using all 472g of MnO2 given to verify if there will be any leftover for Al. This is shown below:

From the balanced equation above,

107.92g of Al reacted with 260.82g of MnO2,

Therefore, Xg of Al will react with 472g of MnO2 i.e

Xg of Al = (107.92 x 472)/260.82

Xg of Al = 195.30g

From the calculations above, we can see clearly that there are leftover for Al as 195.30g out of 203g reacted.

Therefore, MnO2 is the limiting reactant

You might be interested in
A sample of an ideal gas has a volume of 2.21 L at 282 K and 1.03 atm. Calculate the pressure when the volume is 1.84 L
PIT_PIT [208]

Answer:

1.33 atm

Explanation:

use general gas equation P1 V1/ T1 = P2 V2/ T2

rearrange and make P2 the subject then solve,it should give you 1.33 atm

3 0
3 years ago
Mixing baking soda and vinegar is an example of an endothermic reaction. This means...
Murrr4er [49]

Answer: think a

Explanation:

6 0
2 years ago
Read 2 more answers
Help please the questions are confusing
SashulF [63]

Answer:

5- number of electrons=11

Explanation:

in a neutral atom number of protons=number of electrons which in this case=11

3 0
3 years ago
Read 2 more answers
In reality, energy conversion from burning fuel is never 100% efficient. Significant loss of energy due to heating occurs. If th
algol [13]

Answer:

Electrical energy = 130000000 J and Heat energy = 520000000 J

Explanation:

Multiply the amount of joules from the last question (650000000) by .20 and .80. (Which are the percentages)

6 0
3 years ago
An atom with 13 protons and an unknown number of neutrons is called____?
MaRussiya [10]
Aluminum contains 13 protons
4 0
3 years ago
Read 2 more answers
Other questions:
  • If I have 6 moles of a gas at a pressure of 5.8 atm and a volume of 12 liters, what
    9·1 answer
  • What is the Factor Label Method?
    14·1 answer
  • Is it Nephrons or Kidney or Urine or Urethra
    12·1 answer
  • The Ostwald process for the commercial production of nitric acid from ammonia and oxygen involves the following steps:
    13·1 answer
  • What is the material called that covers landmasses. the material is made out of once-living animals and tiny bits of rocks?
    8·1 answer
  • A 18.00 g g milk chocolate bar is found to contain 11.00 g g of sugar.1. How many milligrams of sugar does the milk chocolate ba
    14·1 answer
  • What evidence suggests that global climate change is causing the oceans to get warmer?
    11·1 answer
  • In what state of matter is carbon dioxide normally found on Earth?​
    10·1 answer
  • What is missing from this graph?<br><br> A. axis labels<br> B. a trendline<br> C. a title
    9·1 answer
  • Pacing thresholds of temporary epicardial electrodes: Variation with electrode type, time, and epicardial position
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!