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melamori03 [73]
3 years ago
5

Balance the equations

Chemistry
1 answer:
tigry1 [53]3 years ago
4 0
Hope this helps you.

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If a 22. 5 mm copper (ii) solution(solution a) had an absorbance of 1. 65. what would be the absorbance if 8 ml of solution a wa
Andru [333]

If a 22. 5 mm copper (ii) solution(solution a) had an absorbance of 1. 65. Then, the absorbance if 8 ml of solution a was used to prepare a 20. 0 ml of a new copper (ii) solution is 918.84.

According to Beer-Lambert law, the absorbance (A) of a substance depends on its concentration (c)

A = ε . l. c

where,

ε: absorptivity of the species

l: optical path length

A 22.5 mM phosphate solution (solution A) had an absorbance of 1.012.

A = ε . l . c

1.65 = ε . l . 22.5 mM

ε . l  = 37.125 mM⁻¹

We will calculate the concentration of the second solution using the dilution rule.

C₁ . V₁ = C₂ . V₂

22.5mM . 8 mL = C₂ . 20.0 mL

C₂ = 24.75 mM

The absorbance of the second solution is:

A = (ε . l ). c

A = (37.125 mM⁻¹) x 24.75 mM = 918.84

Thus, we find that the value of absorbance is 918.84.

Learn more about absorption:

brainly.com/question/23938376

#SPJ4

3 0
2 years ago
Please help me, also I have other unanswered questions similar to this one if you can help I'd greatly appreciate it. got until
mart [117]

Answer:

C. Br and Cl

Explanation:

The pair that will share electrons when a bond forms between them is Br and Cl.

When electrons are shared between two atoms to form a bond, then the bond type formed is called a covalent bond.

  • A covalent bond forms between non-metals.
  • Br and Cl are non-metals
  • The electronegativity difference between the species must be very low or zero.
  • This is the case for the two non-metals.
7 0
3 years ago
Read 2 more answers
Select true or false: there will be no fe(oh)3 precipitate in a buffer solution that is 0.60 m ch3cooh and 0.10 m ch3coona, if t
Debora [2.8K]
It's false.the reason is explained in the picture

5 0
4 years ago
URGENT PLS HELP
pav-90 [236]

Umm where is the Graph?

6 0
3 years ago
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In which substance does sulfur have a negative oxidation number?<br>Na2S<br>CaSO4<br>S<br>SO2
leonid [27]

Answer:

Na2S  

Explanation:

Na2S: Na (always +1). S (-2) in this formula

CaSO4:   Ca (always +2). O (-2). => S (+6) in CaSO4

S (0)

SO2:  O(-2) => S (+4)

Hope this answer will help you! Have a nice day!

3 0
4 years ago
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