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hichkok12 [17]
3 years ago
7

PLZZ HELP!!!

Chemistry
1 answer:
pashok25 [27]3 years ago
5 0
The sun evaporates the water from a stream or some type of water source and it then gets collected  into the clouds and then condensation and the last step is when the water is too heavy so the clouds release it and that is called precipitation. hope this helps.
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What is the density of ice
amm1812
The density of ice is 0.9167 g/cm<span>3</span>
5 0
3 years ago
Read 2 more answers
If 21.00 mL of a 0.68 M solution of C6H5NH2 required 6.60 mL of the strong acid to completely neutralize the solution, what was
Andru [333]

Answer:

pH = 2.46

Explanation:

Hello there!

In this case, since this neutralization reaction may be assumed to occur in a 1:1 mole ratio between the base and the strong acid, it is possible to write the following moles and volume-concentrations relationship for the equivalence point:

n_{acid}=n_{base}=n_{salt}

Whereas the moles of the salt are computed as shown below:

n_{salt}=0.021L*0.68mol/L=0.01428mol

So we can divide those moles by the total volume (0.021L+0.0066L=0.0276L) to obtain the concentration of the final salt:

[salt]=0.01428mol/0.0276L=0.517M

Now, we need to keep in mind that this is an acidic salt since the base is weak and the acid strong, so the determinant ionization is:

C_6H_5NH_3^++H_2O\rightleftharpoons  C_6H_5NH_2+H_3O^+

Whose equilibrium expression is:

Ka=\frac{[C_6H_5NH_2][H_3O^+]}{C_6H_5NH_3^+}

Now, since the Kb of C6H5NH2 is 4.3 x 10^-10, its Ka is 2.326x10^-5 (Kw/Kb), we can also write:

2.326x10^{-5}=\frac{x^2}{0.517M}

Whereas x is:

x=\sqrt{0.517*2.326x10^{-5}}\\\\x=3.47x10^-3

Which also equals the concentration of hydrogen ions; therefore, the pH at the equivalence point is:

pH=-log(3.47x10^{-3})\\\\pH=2.46

Regards!

6 0
2 years ago
NEED HELPPP PLSSSSSSSSSS
Leto [7]
I would pick the first option in the third option
4 0
3 years ago
What element is [Ar] 452 3010 5p5
kolezko [41]

Answer:

Argon

Explanation:

Argon is a chemical element with the symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas

hope it helps!

8 0
3 years ago
Which chemistry studies non carbon based structures?
Tasya [4]

Answer:

Inorganic chemistry

Explanation:

Meaning: Inorganic chemistry studies substances that do not contain carbon; therefore, it studies non carbon based structure.

8 0
3 years ago
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