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
Neko [114]
2 years ago
5

The reaction of Fe₂O₃ with CO produces Fe(s) and CO₂(g). What mass of Fe₂O₃ is required to produce 5.00 kg of Fe(s) if the perce

nt yield for the reaction is 78.5%? You may assume that CO(g) is present in excess.
Chemistry
1 answer:
irina [24]2 years ago
6 0

Answer:

2.75g

Explanation:

Firstly, we write a balanced equation of the reaction.

Fe2O3(s)+3CO(g)-->2Fe(s)+3CO2(g).

Now, we write the formula for the percentage yield.

Percentage yield = Actual yield/theoretical yield * 100%

From the equation, we can see that we have one unknown

We convert the 5kg to g. It must be known that 5kg is 5000g as 1kg equals 1000g.

Now, we are asked to calculate the mass of the iron iii oxide required.

From the balanced equation we can see that 1 mole of iron trioxide yielded 2 moles of Fe.

Now, let’s calculate the mass required. We calculate the actual number of moles of iron produced. This is the mass of iron divided by the molar mass. The atomic mass of iron is 56 amu. The number of moles of iron produced is 5000/56 moles

Since the mole ratio is 1 to 2, the number of moles of iron trioxide thus used is 5000/56 divided by 2 which equals 5000/112 moles.

Now, we proceed to calculate the mass of iron trioxide used. The mass is equal the molar mass multiplied by the number of moles. The molar mass of iron trioxide is 2(56) + 3(16) = 112 + 48 = 160g/mol

The mass thus required to produce 5kg of iron is 5000/112 * 160 which is 3,500g or 3.5kg. We know this to be the theoretical mass, the actual mass is calculated using the formula given above.

78.5 = actual mass/3.5 * 100

Actual mass = (3.5 * 78.5) /100

= 2.75g

You might be interested in
What happens when sodium metal is dropped in water
Juliette [100K]

when sodium metal is dropped in water, hydrogen gas in liberated due to extreme heat released as the reaction is exothermic, gas catches fire.

3 0
3 years ago
Which gas law refers to the solubility of a gas changing with the pressure over the solution
Dmitry [639]

Answer:

the answer should be henry's law

6 0
3 years ago
How much of a 24-gram sample of Radium-226 will remain unchanged at the end of three half-life periods?
shutvik [7]

Answer:

The right answer is "3 g".

Explanation:

Given:

Initial mass substance,

M_0=24 \ g

By using the relation between half lives and amount of substances will be:

⇒ M=\frac{M_0}{2^n}

        =\frac{24}{2^3}

        =3 \ g

Thus, the above is the correct answer.

8 0
2 years ago
Relate the intermolecular forces in hydrocarbons to their physical properties and uses
DENIUS [597]

The physical properties of alkenes and alkynes are generally similar to those of alkanes or cycloalkanes with equal numbers of carbon atoms. Alkynes have higher boiling points than alkanes or alkenes, because the electric field of an alkyne, with its increased number of weakly held π electrons, is more easily distorted, producing stronger attractive forces between molecules.

8 0
3 years ago
Define position and reference point in your own words. Dont copy and paste!
irga5000 [103]

Answer: The beginning stage you decide to depict the area, or position, of an object.

Explanation: starting point or position

4 0
3 years ago
Other questions:
  • When glass is formed, which of these takes place FIRST? A) The sand turns to liquid. B) The molecules become hard. C) The sand i
    7·1 answer
  • How many moles of ethyl alcohol, C2H6O, are in a 27.0g sample
    7·1 answer
  • The reaction of 11.9 g of chcl3 with excess chlorine produced 11.2 g of ccl4, carbon tetrachloride: what is the percent yield?
    8·2 answers
  • sample of saline contains 45 ml of saline in 128 ml of water. What is the percent by volume of the solution?
    8·1 answer
  • Which describes the relationship between a monomer and a polymer?
    11·1 answer
  • There are 5 areas of chemistry:physical chemistry, organic chemistry, analytical chemistry, biochemistry and inorganic chemistry
    15·1 answer
  • How many miles are there if you have 70.5g of Nacl
    7·1 answer
  • How many atoms are in 3.2 moles of chromium?
    14·1 answer
  • The way these nucleotides (more specifically, the bases of each nucleotide) pair together is called complementary base pairing.
    14·1 answer
  • Anyone know what the answer is?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!