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bagirrra123 [75]
3 years ago
7

Which headings should be used to complete this table?

Chemistry
2 answers:
ch4aika [34]3 years ago
6 0

Answer:functional group (top row); sources in nature (bottom row)

Explanation:

Jet001 [13]3 years ago
5 0

Answer:functional group (top row), uses(bottom row)

Explanation:

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Calculate the pH for the following weak acid. A solution of HCOOH has 0.12M HCOOH at equilibrium. The Ka for HCOOH is 1.8×10−4.
Shtirlitz [24]

Answer:

the pH of HCOOH solution is 2.33

Explanation:

The ionization equation for the given acid is written as:

HCOOH\leftrightarrow H^++HCOO^-

Let's say the initial concentration of the acid is c and the change in concentration x.

Then, equilibrium concentration of acid = (c-x)

and the equilibrium concentration for each of the product would be x

Equilibrium expression for the above equation would be:

\Ka= \frac{[H^+][HCOO^-]}{[HCOOH]}

1.8*10^-^4=\frac{x^2}{c-x}

From given info, equilibrium concentration of the acid is 0.12

So, (c-x) = 0.12

hence,

1.8*10^-^4=\frac{x^2}{0.12}

Let's solve this for x. Multiply both sides by 0.12

2.16*10^-^5=x^2

taking square root to both sides:

x=0.00465

Now, we have got the concentration of [H^+] .

[H^+] = 0.00465 M

We know that, pH=-log[H^+]

pH = -log(0.00465)

pH = 2.33

Hence, the pH of HCOOH solution is 2.33.

7 0
3 years ago
Read 2 more answers
What is name of HOPBr2 ?
USPshnik [31]
HOPBr₂ = <span>dibromophosphinous acid

hope this helps!

</span>
5 0
4 years ago
What is the oxidizing agent in the citric acid cycle that is derived in part from the vitamin niacin?
nasty-shy [4]

Answer:

NAD (Nicotinamide adenine dinucleotide)

Explanation:

NAD+ (or NADH in its reduced form) is important in cellular respiration as it acts as an electron carrier, providing a shuttle system for the movement of electrons. This drives a proton pump and generates ATP via oxidative phosphorylation.  Niacin is a form of vitamin B3 that we get from our diet and is a precursor for NAD.

3 0
3 years ago
The most important element on earth Is Oxygen O water a hydrogen () carbon​
mario62 [17]

Answer:

Carbon

Explanation:

Carbon is the most important element to life. Without this element, life as we know it would not exist. As you will see, carbon is the central element in compounds necessary for life.

8 0
3 years ago
Read 2 more answers
What is the solubility of m(oh)2 in a 0.202 m solution of m(no3)2? ksp 4.45*10^-12?
umka2103 [35]

<span>M(NO</span>₃<span>)</span>₂<span> fully separates into M</span>²⁺<span> and NO</span>₃<span> </span>²⁻<span> </span><span>and M(OH)</span>₂<span> partially separates as <span>M</span></span>²⁺<span><span> and 2OH</span></span>⁻

<span>M(NO</span>₃<span>)</span>₂<span><span>     </span>→        M</span>²⁺<span>      +          2NO</span>₃²⁻

<span>0.202 M                 0.202 M</span>

 

<span>     M(OH)</span>₂<span>(s)        ↔        <span>M</span></span>²⁺<span><span> (aq) +          2OH</span></span>⁻<span><span>(aq)</span></span>

<span>I                                         -                            -</span>

<span>C   -X                                +X                        +2X</span>

<span>E                                        X                          2X</span>

 

<span>Ksp                  =          [M</span>²⁺<span> (aq)] [OH</span>⁻<span>(aq)]</span>²

4.45 * 10∧-12        =          (0.202 + X ) (2X)²

Since X is very small, (0.202 + X ) = 0.202

<span>4.45 * 10<span>-12        </span>=          0.202 * 4X</span>²

<span>            X          =          2.347 </span>× 10∧-6 M

Hence the solubility of <span>M(OH)2 is 2.347 </span>× 10∧-6 M

6 0
4 years ago
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