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Finger [1]
3 years ago
12

ASAP HELP

Chemistry
2 answers:
jeyben [28]3 years ago
7 0

Answer:

the answer is 2.75 but since that isn't an option I'd go with 1 because I just took a test with this question and it was the right answer.. hopefully that helps

BabaBlast [244]3 years ago
6 0

Answer:

2.75

Explanation:

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A solution that is 0.20 m in hcho2 and 0.15 m in nacho2 find ph
Mashutka [201]
We are given
0.2 M HCHO2 which is formic acid, a weak acid
and
0.15 M NaCHO2 which is a salt which can be formed by reacting HCHO2 and NaOH

The mixture of the two results to a basic buffer solution
To get the pH of a base buffer, we use the formula
pH = 14 - pOH = 14 - (pKa - log [salt]/[base])

We need the pKa of HCO2
From, literature, pKa = 1.77 x 10^-4
Substituting into the equation
pH = 14 - (1.77 x 10^-4 - log 0.15/0.2)
pH = 13.87

So, the pH of the buffer solution is 13.87
A pH of greater than 7 indicates that the solution is basic and a pH close to 14 indicates high alkalinity. This is due to the buffering effect of the salt on the base.
5 0
3 years ago
What is the atomic mass for this element?0,-3,6,3
Sedaia [141]

Answer:

3

Explanation:

Atomic number refers to the number of protons in the nucleus of the atom.

and since there are 3 protons, the atomic number is 3

6 0
3 years ago
Read 2 more answers
Chemistry neeeeeeed help!
ryzh [129]
<h3> <u>ANSWER</u> </h3>

4. O²-

<h3><u>EXPLANATION</u> </h3>

O²- has 16 electrons while Ne has 18 electrons. O²- is a molecule that has one electron added to each atom, meaning that there are two extra electrons which makes O²- the same electron configuration as of Ne atom.

8 0
3 years ago
PLEASE! need help now please!
AysviL [449]

Answer:

• The closing of the frontier

Explanation:

• The closing of the frontier• The closing of the frontier• The closing of the frontier• The closing of the frontier• The closing of the frontier• The closing of the frontier• The closing of the frontier

8 0
3 years ago
How are the isotopes of an element different from one another ?
Serggg [28]
They have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.
8 0
3 years ago
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