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Vadim26 [7]
3 years ago
8

Which picture shows the correct flow of electrical current

Chemistry
2 answers:
Tanya [424]3 years ago
7 0

Answer : The correct picture is, (C)

Explanation :

As we know that the direction of flow of electric current and flow of electrons are opposite.

That means the direction of flow of electrons from negative terminal to the positive terminal in an electric circuit.

The direction of flow of the electric current from positive terminal to the negative terminal in an electric circuit.

Hence, the correct picture is, (C)

Elina [12.6K]3 years ago
6 0
The answer is c because it is going to the light bulb

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Explanation:

H _{2}O _{2(aq)} →H _{2}O _{(l)}  + O _{2}(g) \\ solution  : 2 \:  and\: 2

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3 years ago
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Select all that apply. Catalysts can save money by essentially lowering the:
k0ka [10]

Answer: Options (a) and (d) are the correct answer.

Explanation:

A catalyst is the substance which helps in increasing the rate of reaction.

Activation energy is the minimum amount of energy required by reactants to start the reaction. On addition of catalyst, the path of reaction changes because the energy barrier gap reduces and hence, the activation energy also decreases.

In the absence of catalyst, we need to increase the temperature so that reaction can occur quickly.

Whereas on addition of catalyst, there is no need to increase the temperature as the catalyst itself is sufficient to increase the rate of reaction. As a result, temperature should be lowered when there is addition of catalyst in the reaction.

Thus, we can conclude that catalysts can save money by essentially lowering the activation energy and temperature required.


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3 years ago
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Please help with the attached picture question 21, 22, 23
klasskru [66]

Explanation:

21. The given molecule for cracking is tetradecane.

On cracking it forms one mole of decane (C10H22) and two moles of ethene gas.

The chemical equation is shown below:

C_1_4H_3_0->C_1_0H_2_2+2C_2H_4

22. The essential condition for the formation of an ester is the reaction of alcohol and acid in presence of concentrated sulfuric acid.

Thus among the given options, the first option is the correct one.

23. Isomers of butanol are shown below:

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5 0
3 years ago
Why is density referred to as a characteristic property of matter?
amm1812

Answer : Density of any particular matter remains the same at any concentration at any weight.


Density does not varies with the concentration. The formula for density is mass / volume.


So if the mass changes the density will change accordingly, also if the volume changes the density will get changed.


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3 years ago
A small piece of Cr metal reacts with dilute HNO3 to form H2 (g), which is collected over water at 18 C in a large flask. The to
Sauron [17]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The partial pressure is P_p= 737.5 mm \ of  \ Hg

Explanation:

The Partial pressure of H_2 is mathematically represented as

           P_p = P_T -P_w

Where P_T is the total pressure of water with a value of 15.5 mm of Hg

           P_w is the partial pressure of water with a value 753 mm of Hg

Now substituting values

          P_p = 753-15.5

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3 years ago
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