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
AfilCa [17]
3 years ago
14

what mass of aluminum oxide is produced from the reaction of 4.63 g of manganese dioxide and 1.07 g of Al? 3MnO2 (s) + 4Al(s) -&

gt; 3Mn (s) + 2Al2O3 (s)

Chemistry
2 answers:
SOVA2 [1]3 years ago
3 0
What website did you find this paper at?
ioda3 years ago
3 0

Answer : The correct answer is 2.04 g of Al₂O₃ is produced.

Given : Mass of Al = 1.07 g Mass of MnO₂ = 4.63 g

Mass of Al₂O₃ = ?

Since there are two reactant given , LIMITING REAGENT need to be found .

Limiting Reagent is the that reactant which totally consumed when a reaction completes . The maximum amount of any product can be produced by Limiting Reagent .

Limiting reagent is identified as that reactant which produced less amount of product out of two reactants.

Following steps can be used to calculate mass of aluminum oxide .

Step 1 : To find mass of Al₂O₃ can be produced from Al

Following are the sub steps :

a) To find mole of Al

Mass of Al can be used to find mole of Al by using mole formula as:

Mole (mol) = \frac{given mass (g)}{atomic mass \frac{g}{mol}}

Mass of Al = 1.07 g Atomic mass of Al = 26.9 \frac{g}{mol}

Plugging value in mole formula :

Mole = \frac{1.07 g}{26.9 \frac{g}{mol}}

Mole = 0.040 mol

b) To find mole ratio of Al₂O₃ : Al

Mole ratio is calculated from balanced reaction

Mole of Al₂O₃ in balanced reaction = 2

Mole of Al in balanced reaction = 4

Hence mole ratio of Al₂O₃ : Al = 2 : 4 = 1 : 2

c) To find mole of Al₂O₃

Mole of Al₂O₃ can be calculated using mole of Al and mole ratio

Mole of  Al_2O_3 = 0.040 mol *  \frac{1}{2}

Mole of Al₂O₃ = 0.020 mol

d) To find mass of Al₂O₃

Mass of Al₂O₃ can be find from its mole using mole formula as :

Molar mass of Al₂O₃ = 101.96 \frac{g}{mol}

0.020 mol = \frac{mass of Al_2O_3}{101.96 \frac{g}{mol}}

Multiplying both side by 101.96 \frac{g}{mol}

0.020 mol * 101.96  \frac{g}{mol}  = \frac{mass of Al }{101.96 \frac{g}{mol}} *101.96 \frac{g}{mol}

Mass of Al₂O₃= 2.04 g

Hence mass of Al₂O₃ produced by 1.07 g of Al = 2.04 g.

Step 2 ) To find mass of Al₂O₃ from MnO₂

Same steps can be used to find mass of Al₂O₃ from mass of MnO₂

a) To find mole of MnO₂

Molar mass of MnO₂ = 86.9\frac{g}{mol}

Mole = \frac{4.63 g}{86.9\frac{g}{mol}}

Mole = 0.053 mol

b) To find mole ratio of Al₂O₃ : MnO₂

Mole of Al₂O₃ in balanced reaction = 2

Mole of MnO₂ in balanced reaction = 3

Hence mole ratio of Al₂O₃ : MnO₂ = 2 : 3

c) To find mole of Al₂O₃

Mole of Al_2O_3 = 0.053 mol * \frac{2}{3}

Mole of Al₂O₃ = 0.035 mol

d) To find mass of Al₂O₃

0.035 mol = \frac{mass of Al_2O_3}{101.96\frac{g}{mol}}

Multiplying both side by 101.96 \frac{g}{mol}

0.035 mol * 101.96 \frac{g}{mol}  = \frac{mass of Al_2O_3}{101.96 \frac{g}{mol}} *101.96 \frac{g}{mol}

Mass of Al₂O₃= 3.57 g

Hence mass of Al₂O₃ produced by 4.63 g of MnO₂ = 3.57 g

Step 3 : To find limiting reagent and mass of Al₂O₃ .

Since Al produced less amount of Al2O3 2.04 g than MnO2 which is 3.57 g , so Al is LIMITING REAGENT .

Hence the amount of Al₂O₃ produced by Al will be considered which is 2.04 g.

You might be interested in
Chemical formula 3CuCl2 + 2Al --> 2AlCl3 + 3Cu
MrRissso [65]

Answer:

nnkkkkhjkkhuokjhllkllllllll

3 0
3 years ago
Water flows from the bottom of a large tank where the pressure is 100 psig through a pipe to a turbine which produces 5.82 hp. T
Marianna [84]

Explanation:

Bernoulli equation for the flow between bottom of the tank and pipe exit point is as follows.

   \frac{p_{1}}{\gamma} + \frac{V^{2}_{1}}{2g} + z_{1} = \frac{p_{2}}{\gamma} + \frac{V^{2}_{2}}{2g} + z_{2} + h_{f} + h_{t}

    \frac{(100 \times 144)}{62.43} + 0 + h[tex] = [tex]\frac{(50 \times 144)}{(62.43)} + \frac{(70)^{2}}{2(32.2)} + 0 + 40 + 60

                          h = \frac{(50 \times 144)}{(62.43)} + \frac{(70)^{2}}{2(32.2)} + 40 + 60 - \frac{(100 \times 144)}{(62.43)}

                            = 60.76 ft

Hence, formula to calculate theoretical power produced by the turbine is as follows.

                                 P = mgh

                                     = 100 \times 60.76

                                     = 6076 lb.ft/s

                                     = 11.047 hp

Efficiency of the turbine will be as follows.

                \eta_{t} = \frac{P_{actual}}{P_{theoretical}} × 100%

                                = \frac{5.82}{11.047} \times 100%                      

                                = 52.684%

Thus, we can conclude that the efficiency of the turbine is 52.684%.

4 0
3 years ago
What two gases make up 99% of the Earth's atmosphere? A. Nitrogen and water vapor B. Carbon dioxide and oxygen C. Carbon dioxide
denpristay [2]

Of the gases listed, nitrogen, oxygen, water vapor, carbon dioxide, methane, nitrous oxide, and ozone are extremely important to the health of the Earth's biosphere. The table indicates that nitrogen and oxygen are the main components of the atmosphere by volume.

so the answer is D. Nitrogen and oxygen

hope this helps!

6 0
3 years ago
There are many advantages to using nuclear power to generate electricity. There are also many disadvantages. Choose all of the a
elena55 [62]

Answer:

abc

Explanation:

6 0
3 years ago
Read 2 more answers
Will vote brainliest and 5 star
svetoff [14.1K]

Answer:

it is B

Explanation:

hope it helps you

4 0
3 years ago
Other questions:
  • What does the speed of seismic wave depend on
    9·1 answer
  • What is the hybridization at each carbon atom in the molecule? write hybridizations starting on the left in molecule?
    6·1 answer
  • SOLVE IT AND HERE'S 30 POINTS In the Northern Hemisphere, the sun is highest in the sky during the _____.
    8·1 answer
  • A 12.82 g sample of a compound contains 4.09 g potassium (K), 3.71 g chlorine (Cl), and oxygen (O). Calculate the empirical form
    7·1 answer
  • I need evidence and a justification that a chemical change/reaction has occured when water meets liquid nitrogen.
    12·1 answer
  • What is the pH of a solution with a pOH of 13.75?
    10·1 answer
  • Is salt pure or impure
    14·1 answer
  • 6/14and3/7 answer 6/11and9/16answer 5:6=10:12answer​
    14·1 answer
  • A qué temperatura hierve el agua​
    12·2 answers
  • 50 POINTS!! What is the relationship between the molecular structure of polypropylene and its macroscopic properties such as str
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!