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Hitman42 [59]
3 years ago
13

What is stratosphere

Chemistry
1 answer:
____ [38]3 years ago
4 0
The stratosphere is above the earth's troposphere. It is about 32 miles above the earth's surface.

Have a nice day! :)
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Nh3 is a weak base (kb = 1.8 × 10–5 m) and so the salt nh4cl acts as a weak acid. what is the ph of a solution that is 0.013 m i
ankoles [38]
First, we need to get the value of Ka:

when Ka = Kw / Kb 

we have Kb = 1.8 x 10^-5 

and Kw = 3.99 x 10^-16  so, by substitution:

Ka = (3.99 x 10^-16) /  (1.8 x 10^-5) = 2.2 x 10^-11

by using the ICE table :

                 NH4+  + H2O →NH3 +  H+
intial          0.013                       0         0 

change       -X                          +X      +X

Equ        (0.013-X)                      X         X

when Ka = [NH3][H+] / [NH4+] 

by substitution:

2.2 x 10^-11 = X^2 / (0.013 - X)  by solving this equation for X

∴X = 5.35 x 10^-7

∴[H+] = X = 5.35 x 10^-7

∴PH = - ㏒[H+]
 
        = -㏒(5.35 x 10^-7)
        = 6.27
6 0
3 years ago
Question 3 (1 point)
antoniya [11.8K]

An electrochemical process involves any process that has to do with the transfer of elecrons.

<h3>What is an elecrochemical process?</h3>

An electrochemical process involves any process that has to do with the transfer of elecrons. These process include redo reactionand electron transport chains.

It is a true statement that the actiivity series helps to detect the products in a reaction because a metal that is lower in the series is always displaced by a metal that is higher in the series.

Learn more about electrochemical processess: brainly.com/question/12034258

6 0
2 years ago
How many total atoms are in 0.690 g of P2O5?
Dmitry_Shevchenko [17]
M P₂O₅ = 31g×2 + 16g×5 = 142g/mol

1 mole of P₂O₅ contains 5 moles of atoms
5 moles of atoms = 30,01×10²³ a.

142g ----------- 30,01×10²³ a.
0,69g ---------- X
X = (0,69×30,01×10²³)/142
X = 0,14626×10²³ = 1,4626×10²² atoms

:)
8 0
3 years ago
Compare and contrast the general properties of alloys and pure metals
murzikaleks [220]
Alloys are used much more than pure metals because they are generally stronger and less likely to react with air or water.

4 0
3 years ago
What can increase pressure of a gas?
Oliga [24]

<u><em>Summary. An increase in the number of gas molecules in the same volume container increases pressure. A decrease in container volume increases gas pressure. An increase in temperature of a gas in a rigid container increases the pressure</em></u>

<u><em></em></u>

8 0
3 years ago
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