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
ValentinkaMS [17]
3 years ago
15

When 40.5 g of Al and 212.7 g of Cl2 combine in the reaction: 2 Al (s) + 3 Cl2 (g) --> 2 AlCl3 (s) c) How many moles of the e

xcess reactant remain at the end of the reaction?
Chemistry
2 answers:
sineoko [7]3 years ago
6 0

Answer:

The answer to your question is 1.49 mol of Cl₂  

Explanation:

Data

mass of Al = 40.5 g

mass of Cl₂ = 212.7 g

moles of excess reactant = ?

- Balanced chemical reaction

                2 Al(s)  +  3Cl₂(g)  ⇒   2AlCl₃

Process

a) Calculate the molar mass of the reactants  

molar mass of Al = 2 x 26.98 = 53.96 g

molar mass of Cl₂ = 6 x 35.45 = 212.7 g

b) Calculate the theoretical proportion  Al/Cl₂ = 53.96/212.7 = 0.254

   Calculate the experimental proportion Al/Cl₂ = 40.5/212.7 = 0.19

As the experimental proportion is lower than the theoretical proportion we conclude that the limiting reactant is Aluminum.

c) Calculate the grams of excess reactant

                    53.96 g of Al ------------------ 212.7 g of Cl₂

                     40.5 g of Al -------------------  x

                      x = (40.5 x 212.7) / 53.96

                      x = 8614.35 / 53.96

                      x = 159.64 g of Cl₂

Excess Cl₂ = 212.7 - 159.64

                  = 53.057 g

d) Calculate the moles of Cl

                       35.45 g of Cl ----------------- 1 mol

                       53.057 g of Cl ---------------  x

                        x = (53.057 x 1)/35.45

                       x = 1.49 mol of Cl₂                    

Doss [256]3 years ago
4 0

Answer:

There will remain 0.75 moles of Cl2

Explanation:

Step 1: Data given

Mass of Al = 40.5 grams

Mass of Cl2 = 212.7 grams

Molar mass Al = 26.99 g/mol

Molar mass Cl2 = 70.9 g/mol

Step 2: The balanced equation

2 Al (s) + 3 Cl2 (g) → 2 AlCl3 (s)

Step 3: Calculate moles

Moles = mass / molar mass

Moles Al = 40.5 grams / 26.99 g/mol

Moles Al = 1.50 moles

Moles Cl2 = 212.7 grams / 70.9 g/mol

Moles Cl2 = 3.0 moles

Step 4: Calculate limiting reactant

For 2 moles Al we need 3 moles Cl2 to produce 2 moles AlCl3

Al is the limiting reactant. It will completely be consumed (1.50 moles)

Cl2 is in excess. There will react 3/2 * 1.50 = 2.25 moles

There will remain 3.0 - 2.25 = 0.75 moles

There will remain 0.75 moles of Cl2

You might be interested in
A solution contains one or more of the following ions: Ag , Ca2 , and Co2 . Lithium bromide is added to the solution and no prec
koban [17]

Answer:

Ca^{2+}  and  Co^{2+}

Explanation:

Given:

A solution contains one or more of the following ions such as Ag, Ca_2 and Co_2

Here the Lithium bromide is added to the solution and no precipitate forms

Solution:

Since with LiBr no precipitation takes place therefore Ag+ is absent

Here on adding Li_2SO_4 to it precipitation takes place.

Precipitate is as follows,

Ca^{2+}(aq)+SO_4^2^-(aq)----->CASO_4(s)

Thus,

Ca^2^+ is present

When Li_3PO_4 is added again precipitation takes place.

Therefore the reaction is as follows,

Co^2^+(aq)+PO_4^3^-(aq)------>Co_3(PO_4)_2(s)

Therefore,

Ca^{2+}  and  Co^{2+} are present in the solution

3 0
3 years ago
This is hard, isn't it? please help me though. PLEASE
Liono4ka [1.6K]
I think it might be A. i am not totally sure though
6 0
2 years ago
NH3
soldier1979 [14.2K]

Answer:

First one is: ammonia

Second one is: calcium hydroxide

Explanation:

4 0
3 years ago
Although si is an insulator then how does it behave as semiconductor upon heating
soldier1979 [14.2K]
A semiconductor's resistivity decreases with the increase in temperature.
More is the heat imparted to  it, it will behave more as an insulator.
8 0
3 years ago
Britney has four different materials of different masses. She decides to test their electrical conductivity by connecting each i
Elden [556K]

idk

im sorry

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Which term describes free-floating, photosynthetic microorganisms in the oceans that are important for producing oxygen? A. phyt
    5·1 answer
  • A sample of milk kept at 25 °C is found to sour 40 times as rapidly as when it is kept at 4 °C. Estimate the activation energy f
    12·1 answer
  • What is Mendeleev most known for?
    8·1 answer
  • The body's nervous system is made up of the brain,the spinal cord, the retina ,and many other nerves. The circulatory system is
    13·2 answers
  • What is poly mineralic rock
    5·2 answers
  • When heat is applied to 80 grams of CaCO3, it yields 39 grams of B. Determine the percentage of the yield.
    5·1 answer
  • un estudiante introduce un corcho cuya densidad es 0.95 g/cm en cada uno de los liquidos que figura representa mejor la situacio
    14·1 answer
  • Calculate the new pressure if a 2300 mL of a gas at a pressure of 1.88 atm is allowed to contract to a volume of 2.21 L.
    10·1 answer
  • Please help fasts thanks
    13·2 answers
  • Express each of the following numbers in exponential notation:SHOW YOUR WORK
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!