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Alinara [238K]
4 years ago
7

Acid rain is closely associated with _______________. select one:

Chemistry
1 answer:
DENIUS [597]4 years ago
3 0
I'm pretty sure its B or C. Sorry, hope this helped some....??
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7. Which of the following does not use echolocation?
Tasya [4]

Answer:

The answer is A,friend.

5 0
4 years ago
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You draw back on the piston of a pump and the volume of air in the pump doubles. Which of the following happens?
ohaa [14]

Answer: The correct answer is Option C.

Explanation:

We are given a piston of a pump, which means that there is no loss of the air. and there is a change in pressure and volume but temperature of the system remains constant.

As, the pressure of the system increases, there will be more number of particles. So, the number of collisions per unit area will increase.

\text{Number of collisions}\propto \text{Pressure}

But in the question, volume gets doubled. So, the pressure will be determined by using Boyle's Law:

P\propto \frac{1}{V}

V_2\rightarrow 2V_1

where, V_1\text{ and }V_2 are the initial and final volume respectively.

Putting the change in volume in above equation, we get:

P_2=\frac{1}{2V_1}\\\\P_2=\frac{1}{2}P_1

where, P_1\text{ and }P_2 are the initial and final pressure respectively.

As, the pressure is reduced to half of the initial pressure. So, the number of collisions per unit area will also be reduced to one-half.

Hence, the correct answer is Option C.

5 0
3 years ago
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Which process is a chemical change?
Vinvika [58]
A. is the correct answer.
8 0
3 years ago
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What is the balance equation for I2 (s) dissolving in water
hjlf

Answer:

I₂ + H₂O --------→ HI + HIO

Explanation:

Iodine is not fully dissolve in water but only dissolve up to some extent.

When iodine was mixed with water it give mixture of two products.

  • Hydrogen iodide or hydroiodic acid (HI)
  • Hypoiodous acid (HIO)

So the balance reaction is as under

        I₂ + H₂O --------→ HI + HIO

All the reactant are one mole and one one mole of each product produced in the shown reaction.

This is a reversible reaction and only 0.05% of Iodine molecule react with water and the other  Iodine molecule remain in water unreacted.

3 0
4 years ago
When you add a controlled amount of substance known as an impurity to a pure semiconductor, its conductivity increases. This pro
alisha [4.7K]

Answer:

See explaination

Explanation:

1. The addition of group 3A elements to group 4A semiconductors decreases the conductivity of the group 4A semiconductors: Wrong

The addition of 3A group elements inreases the conductivity and make them extrinsic semiconductors( p-type)

2. The conductivity of semiconductors can be increased by the doping process.: Correct

3.As the temperature increases, the conductivity of semiconductors decreases.. wrong

As the temperature increases, the conductivity of semiconductors increases.

4. The addition of group 5A elements to group 4A semiconductors increases the conductivity of the group 4A semiconductors: Correct : They will create n-type semicoductor.

5.Holes are charge carriers in p-type semiconductors: Correct

6. Electrons are charge carriers in n-type semiconductors: Correct

3 0
3 years ago
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