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timama [110]
3 years ago
11

Air pressure goes from areas of high pressure to areas of low pressure.

Chemistry
2 answers:
Kaylis [27]3 years ago
8 0
False because when warm air rises cool air will often move in
Y_Kistochka [10]3 years ago
6 0

Answer:

true

give me brainliest pls

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Among the following which are represent polyatomic molecule.A.H2 B.He C.N2 D.P4 which one ​
olga2289 [7]

Answer:

D

Explanation:

P4 is polyatomic molecule

6 0
3 years ago
------------------------------------------------
zavuch27 [327]

Answer:

what would u like me to do on this?

Explanation:

do you have a tablel of elements? if not then look at on online and search them all.

5 0
3 years ago
Read 2 more answers
What Size container do you need to hold 0.0459 mol of N2 gas at stp
Allushta [10]
Hello!

You need to calculate the volume of the container. To calculate the volume of this amount of N₂ gas we need to make the assumption that N₂ behaves like an ideal gas. 

1 mole of an ideal gas under Standard Temperature and Pressure occupies 22,4 L so the calculations are as follows:

0,0459 mol N_2* \frac{22,4 L}{1 mol N_2}= 1,028 L

So, the volume of the container should be 1,028 L or more.

Have a nice day!
4 0
3 years ago
What is the pH of a 0.65 M solution of pyridine, C5H5N?
Arada [10]

Hey there!

The pH of a weak base (in this case, pyridine is a weak base) is calculated by using the weak base equation, and then solving it.

C5H5N; Kb= 1.7 x 10⁻⁹

pH = -log [H⁺]

we can also say that pH = 14 + log [OH⁻]

Plugging into the weak base equation, we know that Kb = [OH⁻][BH⁺] / [B]

This can be solved using an ice chart, which will then simplify to :

Kb = [x][x] / [0.50-x]

We can assume that x is very small in comparison to the 0.5 , so we consider it zero.


Then plug in and solve for x.  1.79 *10-9 = x² / 0.5

x = 2.992 * 10⁻⁵

ince X is equal to the [OH⁻] concentration, we can plug it into the second pH equation, and get the pH!

pH = 14+ log 2.99 * 10⁻⁵

pH = 9.48

Hope that helps!

3 0
3 years ago
What is the name of the structure that holds the vocal cords?
Fittoniya [83]

Answer:

The answer is larynx. I believe it is anyways. Sorry if i'm wrong.

7 0
3 years ago
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