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3 years ago

Which gas is given out during burning process

Chemistry

1 answer:

Svetllana [295]3 years ago

3 0

Answer:

Carbon dioxide

I hope it helps

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What is the Ea for the exothermic reaction on the right A) 268.74 kJ B) -171.08 kJ C) 88.00 kJ D) -259.09 kJ

icang [17]

Answer:

Option C. 88 KJ

Explanation:

The activation energy (Ea) is the minimum energy that reactant must overcome in order for them to proceed to product.

In an energy profile diagram, the activation energy (Ea) is obtained by calculating the difference between the energy of the activation complex (i.e peak) and the energy of the reactant.

With the above information, we shall determine the activation energy (Ea) of the reaction above as follow:

Activation complex = 268.74 KJ

Energy of reactant = 180.74 KJ

Activation energy (Ea) =?

Activation energy = Activation complex – Energy of reactant

Activation energy = 268.74 – 180.74

Activation energy = 88 KJ

Therefore, the activation energy (Ea) of the reaction is 88 KJ

8 0

4 years ago

An example of a solution is vinegar because it has 5% acid and 95% water True orFalse

Blababa [14]

Answer:

The answer is true!

Explanation:

8 0

4 years ago

Making Sense

Alexandra [31]

Answer: I think that trains move faster then cars! Buttt, The trains are much stronger and bigger, then cars or trucks. Even if they move slowly they can still crush something smaller then them.

Explanation: ( didnt really understand the question, but i tried)

5 0

3 years ago

How acetophenone can be converted to phenol by reaction?

zysi [14]

Answer:

m-CPBA followed by base catalysed hydrolysis

Explanation:

The scheme of this reaction is shown in the image attached.

We can see here that the acetophenone reacts with metachloroperoxybenzoic acid (m-CPBA) as shown in the image to yield phenyl acetate.

Phenyl acetate is now hydrolysed by a base as shown to yield the acetate ion and phenol.

4 0

3 years ago

Zinc reacts with iodine in a synthesis reaction. Using a balanced chemical equation for the reaction, determine the percent yiel

Karolina [17]

81.9 % is the percent yield of reaction of zinc with iodine producing ZnI2.

Explanation:

Balanced chemical equation for the reaction:

Zn + I2 ⇒ ZnI2

Data given:

mass of sample zinc = 129 grams

mass of ZnI2 formed = 510.6 grams (actual yield)

number of moles = $\frac{mass}{atomic mass of one mole}$

number of moles of zinc = $\frac{129}{65.38}$

= 1.97 moles

from stoichiometry

1 mole of Zn reacts to form 1 mole of ZnI2

1.97 moles of Zn will form 1.97 moles of ZnI2

atomic mass of ZnI2 = 319.22 grams/mole

mass of ZnI2 formed = 628.86 grams (theoretical yield)

% yield = $\frac{actual yield}{theoretical yield}$ x100 equation 1

from the reaction,

Putting the values in equation 1

% yield = $\frac{510.6}{628.86}$ x 100

= 81.19 % is the % yield.

6 0

3 years ago