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2 years ago

Define the acid rain for class 10 .???

1 answer:

7 0

Answer: Acid rain is caused by a chemical reaction that begins when compounds such as sulphur dioxide and oxides of nitrogen are released into the air. These substances can rise very high up into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants called acid rain.

Explanation:

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A sample of hydrogen was collected by water displacement at 23.0°C and an atmospheric pressure of 735 mmHg. Its volume is 568 mL

ziro4ka [17]

Answer:

V = 552 mL or 0.552 L

Explanation:

First, we need to calculate the number of moles of H2 using the ideal gas equation which is:

PV = nRT

Solving for n:

n = PV / RT

Where:

P = Pressure

V = Volume

R = Gas constant (0.082 L atm / K mol)

T = Temperature in K

Let's convert first both pressure in atm, remember that 1 atm = 760 mmHg

P = 735 / 760 = 0.967 atm

Pwater = 21 / 760 = 0.028 atm

Finally temperature to Kelvin:

T = 23 + 273.15 = 296.15 K

Now, at first the hydrogen was collected by water displacement so pressure is:

P = 0.967 - 0.028 = 0.939 atm

Now the moles of hydrogen:

n = 0.939 * 0.568 / 0.082 * 296.15

n = 0.022 moles

Now that we have the moles, let's calculate the volume when the pressure is 735 mmHg

V = nRT/P

V = 0.022 * 0.082 * 296.15 / 0.967

V = 0.552 L or 552 mL

This is the volume that hydrogen occupies.

6 0

2 years ago

The concentration of hydronium ions is greater than 1 × 10–7 for basic solutions. True False

Nataly [62]

Answer : The given statement is, false.

Explanation :

Ionic product of water : It is defined as the product of the concentration of hydrogen ion and the concentration of hydroxide ion.

The mathematical expression will be,

$[H^+][OH^-]=10^{-14}$

When the concentration of hydrogen ion and hydroxide ion are equal then the solution is neutral and the value will be, $1\times 10^{-7}$ . And the pH of the solution is, 7.

When the concentration of hydrogen ion is greater than $1\times 10^{-7}$ then the solution is acidic in nature. And the pH of the solution is, less than 7.

When the concentration of hydrogen ion is less than $1\times 10^{-7}$ then the solution is basic in nature. And the pH of the solution is, greater than 7.

Hence, the given statement is false.

5 0

2 years ago

For the following situations, describe the contact and non-contact forces that are involved

maw [93]

Answer:c

Explanation:

3 0

2 years ago

What is the difference between random decay and theoretical?

denis-greek [22]

Answer:

Spontaneous and random. Decay is called spontaneous because the occur on their own and are unaffected by external factors like temperature, pressure, and many more. Decay is called random because we cannot determine the rate at which it decays but can only determine the probability of the decay.Oct 21, 2015

Explanation:

7 0

2 years ago

Which of the following is a characteristic of a bird?

Elis [28]

Answer:

Explanation:

Chickens are birds and they lay hard shelled eggs

Penguins are birds and lay hard shelled eggs

5 0

2 years ago