It is B, smoke and air pollution can stress the lungs and cause things like Respiratory distress if not wearing a proper mask. That is why in places with massive amounts of air pollution many people will wear face masks.

4 0

3 years ago

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Calculate mole fraction of benzene (70 g) having 30 gram of mass of carbon tetrahedral

Fynjy0 [20]

Moles of benzene

70/90=7/9=0.8mol

moles of CCl_4

30/154
0.2mol

Now

$\\ \rm\Rrightarrow \chi_{C_6H_6}$

$\\ \rm\Rrightarrow \dfrac{\chi_{C_6H_6}}{\chi_{sol^n}}$

$\\ \rm\Rrightarrow \dfrac{0.8}{0.8+0.2}$

$\\ \rm\Rrightarrow \dfrac{0.8}{1}$

$\\ \rm\Rrightarrow 0.8$

4 0

2 years ago

Can somebody plz help answer all of these questions right it’s very important. If u can that will be amazing thanks!

Blababa [14]

Answer:

1. Mechanical energy

2. Heat/thermal energy

3. Electrical energy

4. Heat energy

5. Electrical energy

Explanation:

Hope this helped!

4 0

3 years ago

If a sound wave speeds up and its frequency does not change, what happens to the wavelength?

yan [13]

Answer: No, the speed of propagation is constant in a given medium; only the wavelength changes as the frequency changes.

Explanation:

5 0

2 years ago

Which of the following is fansitionmetallonAkt02 라Sfeet​

Which of the following is fansitionmetallonAkt02 라Sfeet