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Irina18 [472]
2 years ago
8

3) Explain the working principle of catalyst for both rate of reaction and equilibrium reaction . show by means of graphical rep

resentation
Chemistry
1 answer:
victus00 [196]2 years ago
8 0

Explanation:

A catalyst has no effect on the equilibrium state, but it enables equilibrium to be reached more quickly by decreasing the “energy of activation”. In fact, a catalyst affects forward and reverse rates equally.

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Which of the following does NOT show the law of conservation of mass?
algol [13]
I think the correct answer from the choices listed above is option B.  <span>24 mL of Mg burn in 32 mL O2 to produce 56 mL of MgO </span>does not show the law of conservation of mass. Volumes cannot be added because there are volume effects when you add different substances. So, the reactants is not equal to the product.
4 0
3 years ago
Read 2 more answers
Calculate the number of grams of solid aluminium chloride that will form when a mixture containing 0.150 g of aluminum powder an
IgorLugansk [536]

Answer:  

0.630 g

Step-by-step explanation:  

We are given the mass of two reactants, so this is a <em>limiting reactant problem</em>.

We know that we will need mases, moles, and molar masses, so, lets <em>assemble all the data in one place</em>, with molar masses above the formulas and masses below them.

M_r:    26.98   70.91      133.34  

           2Al   +   3Cl₂ ⟶ 2AlCl₃

m/g:  0.150       1.00

Step 1.  Calculate the <em>moles of each reactant  </em>

Moles of Al   = 0.150 g × 1 mol/26.98 g  = 0.005 560 mol

Moles of Cl₂ =  1.00  g  × 1 mol/70.91  g  = 0.014 10     mol

Step 2. Identify the l<em>imiting reactant </em>

Calculate the moles of AlCl₃ we can obtain from each reactant.

<em>From Al</em>:  

The molar ratio of AlCl₃:Al is 2:2

Moles of AlCl₃ = 0.005 560 × 2/2  

Moles of AlCl₃ = 0.005 560 mol AlCl₃

<em>From Cl₂:</em>  

The molar ratio of AlCl₃: Cl₂ is 2:3.  

Moles of AlCl₃ = 0.014 10 × 2/3  

Moles of AlCl₃ = 0.009 401 mol AlCl₃  

Al is the <em>limiting reactant </em>because it gives the smaller amount of AlCl₃.  

<em>Step 4</em>. Calculate the <em>theoretical yield.</em>

Theor. yield = 0.005 560 mol AlCl₃ × 133.34 g AlCl₃/1 mol AlCl₃

Theor. yield = 0.630 g AlCl₃

7 0
3 years ago
Calcium Oxide will react with ammonium chloride to produce ammonia gas, water vapor, and calcium chloride. If only 16.3 g of amm
Vaselesa [24]

Answer:

                     %age Yield  =  22.72 %

Explanation:

                    The balance chemical equation is as follow;

                           2 NH₄Cl + CaO → 2 NH₃ + CaCl₂ + H₂O

Step 1: <u>Calculate Moles of CaO, NH₄Cl and NH₃;</u>

CaO:

        Moles  =  Mass / M.Mass

        Moles  =  112 g / 56.07 g/mol

        Moles  =  1.99 moles of CaO

NH₄Cl:

        Moles  =  Mass / M.Mass

        Moles  =  224 g / 53.49 g/mol

        Moles  =  4.18 moles of NH₄Cl

NH₃:

        Moles  =  Mass / M.Mass

        Moles  =  16.3 g / 17.03 g/mol

        Moles  =  0.95 moles of NH₃

Step 2: <u>Calculate Limiting reagent as:</u>

According to equation.

                   2 moles of NH₄Cl reacts with  =  1 mole of CaO

So,

              4.18 moles of NH₄Cl will react with  =  X moles of CaO

Solving for X,

                     X =  4.18 mol × 1 mol / 2 mol

                     X  =  2.09 mol of CaO

This means that none of the given reagent is limiting reagent. They both are almost equal in number of moles.

Step 3: <u>Calculate Theoretical Yield of NH₃ as;</u>

According to equation.

                   2 moles of NH₄Cl produced  =  2 moles of NH₃

So,

              4.18 moles of NH₄Cl will produce  =  X moles of NH₃

Solving for X,

                     X =  4.18 mol × 2 mol / 2 mol

                     X  =  4.18 mol of NH₃

Step 4: <u>Calculate Percentage Yield as;</u>

             %age Yield  =  Actual Yield / Theoretical Yield × 100

             %age Yield  =  0.95 mol / 4.18 × 100

             %age Yield  =  22.72 %

5 0
3 years ago
Use your understanding of the ideal gas law to
WITCHER [35]
Answer:
Pressure is inversely related to volume.
Temperature is inversely related to moles.
Volume is inversely related to pressure.
Moles are inversely related to temperature.
6 0
3 years ago
The bathroom mirror has water droplets on it after a hot shower. choose the correct phase change. HELPP
Liula [17]

Answer:

what?

Explanation:

what the hell?

6 0
2 years ago
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