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
inysia [295]
3 years ago
7

How many g of Aluminum are needed to react completely with 4.40 gram of Mn304, according to the chemical equation below? 3 Mn304

8A>9 Mn 4 A1203 2.65 g 19.2 g 24.3 g ④ 1.54 g 1.38 g (6) 0.860 g ⑦ 3.91 g 8.70g
Chemistry
1 answer:
Molodets [167]3 years ago
3 0

<u>Answer:</u> The mass of aluminium required is 1.38 grams.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}     .....(1)

Given mass of Mn_3O_4 = 4.40 g

Molar mass of Mn_3O_4 = 229 g/mol

Putting values in equation 1, we get:

\text{Moles of }Mn_3O_4=\frac{4.40g}{228.8g/mol}=0.0192mol

For the given chemical equation:

3Mn_3O_4+8Al\rightarrow 9Mn+4Al_2O_3

By Stoichiometry of the reaction:

3 moles of Mn_3O_4 reacts with 8 moles of aluminium

So, 0.0192 moles of Mn_3O_4 will react with = \frac{8}{3}\times 0.0192=0.0512mol of aluminium

Now, calculating the mass of aluminium by using equation 1, we get:

Molar mass of aluminium = 27 g/mol

Moles of aluminium = 0.0512 moles

Putting values in equation 1, we get:

0.0512mol=\frac{\text{Mass of aluminium}}{27g/mol}\\\\\text{Mass of aluminium}=(0.0512mol\times 27g/mol)=1.38g

Hence, the mass of aluminium required is 1.38 grams.

You might be interested in
Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. An industrial ch
mamaluj [8]

Answer:

Explanation:

From the given information:

The equation for the reaction can be represented as:

2SO_2 + O_2 \to 2SO_3

The I.C.E table can be represented as:

                     2SO₂              O₂                   2SO₃

Initial:             14                  2.6                     0

Change:        -2x                -x                      +2x

Equilibrium:   14 - 2x          2.6 - x                2x

However, Since the amount of sulfur trioxide gas to be 1.6 mol.

SO₃ = 2x,

then x = 1.6/2

x = 0.8 mol

For 2SO₂; we have 14 - 2x

= 14 - 2(0.8)

= 14 - 1.6

= 12.4 mol

For O₂; we have 2.6 - x

= 2.6 - 1.6

= 1.0 mol

Thus;

[SO₂] = moles / volume = ( 12.4/50) = 0.248 M ,

[O₂] = 1/50 = 0.02 M ,  

[SO₃] = 1.6/50 = 0.032 M

Kc = [SO₃]² / [SO₂]² [O₂]

= ( 0.032²) / ( 0.248² x 0.02)

= 0.8325

Recall that; the equilibrium constant for the reaction 2SO_2 + O_2 \to 2SO_3 = 0.8325;

If we want to find:

SO_2 + \dfrac{1}{2}O_2 \to SO_3

Then:

K_c = (0.8325)^{1/2}

\mathbf{K_c = 0.912}

Since no temperature is given to use in the question, it will be impossible to find the final temperature of the mixture.

7 0
3 years ago
A neutral pH level is _____.<br> 5<br> 7<br> 8
love history [14]
Neutral pH is level 7
5 0
3 years ago
What happens when sodium and cholorine are mixed
tigry1 [53]

Answer:

The short of it is you would create salt.

Explanation:

If sodium metal and chlorine gas mix under the right conditions, they will form salt. The sodium loses an electron, and the chlorine gains that electron. This reaction is highly favorable because of the electrostatic attraction between the particles. In the process, a great amount of light and heat is released.

5 0
3 years ago
Read 2 more answers
PLEASEEE HELPPP!!!!!!
chubhunter [2.5K]

Answer:

A

Explanation:

Cs has a higher rate of reaction because it's easier to remove an electron from it, thereby leading to faster reactivity

5 0
3 years ago
Read 2 more answers
What volume of 7.25 mol/L stock solution in needed to make 3.84 L of 8.50 mol/L solution?
Serjik [45]

Answer:

4.50 L

Explanation:

First we <u>calculate how many moles are there in 3.84 L of a 8.50 mol/L solution</u>:

  • 3.84 L * 8.50 mol/L = 32.64 mol

Now, keeping in mind that

  • Concentration = Mol / Volume

we can calculate the volume of a 7.25 mol/L solution that would contain 32.64 moles:

  • Volume = Mol / Concentration
  • Volume = 32.64 mol ÷ 7.25 mol/L
  • Volume = 4.50 L

So we could take 4.50 L of the 7.25 mol/L solution and evaporate the solvent until only 3.84 L remain.

7 0
2 years ago
Other questions:
  • Plz help with number 4
    6·1 answer
  • 1L= 1,000,000,000,000 _L
    12·1 answer
  • Someone help with this please
    9·1 answer
  • Potassium chloride and oxygen gas are formed upon heating potassium
    6·1 answer
  • On a warm summer day in Oslo, the temperature is 21 degree C and the relative humidity is 70%. What is the absolute humidity? Wh
    14·1 answer
  • Two samples of carbon come into contact. A heat transfer will occur between sample A and sample B. What must be true for heat to
    9·2 answers
  • Given the amount of camphor (200mg) we are using in this experiment, please determine how many mg of sodium borohydride to use i
    11·1 answer
  • What kind of magma produce the most violent eruptions
    11·1 answer
  • Which condition would have resulted from the functions of prokaryotes on early Earth?
    9·1 answer
  • Which of the following reactions below could be properly categorized as a synthesis reaction?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!