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konstantin123 [22]
2 years ago
10

Type the letter of the correct answer in the blank space. The image shows the combustion of methane. Which equation represents t

his chemical reaction? Screenshot 2021-09-29 092155. Png A. CH4 O2 → CO2 H2O B. 2CH4 2O2 → CO2 2H2O C. CH4 2O2 → 2CO2 H2O D. CH4 O2 → 2CO2 2 H2O E. CH4 2O2 → CO2 2H2O.
Chemistry
1 answer:
Talja [164]2 years ago
7 0

Answer:

CH4 + 2O2 → CO2 + 2H2O

Explanation:

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Answer:

C) quartz

Explanation:

Quartz is a common mineral. Also, quartz isn't a metallic substance. I'm hoping that this helps :)

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3 years ago
Hydrogen peroxide decomposes spontaneously to yield water and oxygen gas according to the following reaction equation. 2H202(aq)
inn [45]

Answer : The temperature for non-catalyzed reaction needed will be 456 K

Explanation :

Activation energy : The energy required to initiate the reaction is known as activation energy.

According to the Arrhenius equation,

K=A\times e^{\frac{-Ea}{RT}}

Since, the rate for both the reaction are equal.

K_1=K_2

A\times e^{\frac{-Ea_1}{RT_1}}=A\times e^{\frac{-Ea_2}{RT_2}}

\frac{Ea_1}{T_1}=\frac{Ea_2}{T_2} ..........(1)

where,

Ea_1 = activation energy for non-catalyzed reaction = 75 kJ/mol

Ea_2 = activation energy for catalyzed reaction = 49 kJ/mol

T_1 =  temperature for non-catalyzed reaction = ?

T_2 = temperature for catalyzed reaction = 25^oC=273+25=298K

Now put all the given values in the above formula 1, we get:

\frac{Ea_1}{T_1}=\frac{Ea_2}{T_2}

\frac{75kJ/mol}{T_1}=\frac{49kJ/mol}{298K}

T_1=456K

Therefore, the temperature for non-catalyzed reaction needed will be 456 K

3 0
3 years ago
When and enzyme lowers the activation energy of a reaction, what happens?
Nostrana [21]

Answer:

Enzymes lower the activation energy of a reaction by binding one of the reactants, called a substrate, and holding it in a way that lowers the activation energy.

Explanation:

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Balanced equation for the combination of magnesium and oxygen to form magnesium oxide
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8 ang kylangan ntin hindi ko alam

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