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arlik [135]
3 years ago
12

The student dissolves the entire impure sample of in enough distilled water to make of solution. Then the student measures the a

bsorbance of the solution and observes that it is . Determine the concentration of in the solution.

Chemistry
1 answer:
GuDViN [60]3 years ago
4 0

Answer:

Check explanation

Explanation:.

NOTE: kindly check for attached file/picture for the graph.

From the graph of absorbance against concentration from the question. We can see that the 0.3 mark absorbance is equivalent to 0.15 M. So, the concentration of CuSO4 is 0.15 M.

The concentration can also be calculated using the Beer-lambert equation for absorbance. The equation is given below;

A= ɛ×C×l --------------------------------------------------------------------------------------(1).

Where A= absorbance, ɛ= molar absorptivity, C= concentration and l= length.

Therefore, the concentration,C will now be; C= A/ ɛ×l. -------------------------------------------------------------------------(2).

Assuming the length,l is 1cm.

Hence, C= 0.300/ ɛ×1.

C= (0.300/ ɛ) M.

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3 years ago
How do you convert 134kj to Calories?
Sonja [21]
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5 0
3 years ago
What is the mass of 4.85 X 10^22 atoms of iron (Fe)?
ludmilkaskok [199]

Answer:

Mass = 4.5 g

Explanation:

Given data:

Number of atoms of iron = 4.85 ×10²² atoms

Mass of iron = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

4.85 × 10²² atoms of iron / 6.022 × 10²³ atoms × 1 mol

0.081 mol

Mass of iron:

Mass = number of moles × molar mass

Mass =  0.081 mol × 55.85 g/mol

Mass = 4.5 g

8 0
3 years ago
A 951g sample of carbon steel with a specific heat capacity of .49j is heated to 673k and quenched in oil. The steel cools to 52
nikdorinn [45]

Answer: all I know it’s not -31.5 for ppl taking the k12 test

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5 0
3 years ago
Read 2 more answers
SOMEONE HELP ASAP I NEED TO FIND AN ANSWER
astra-53 [7]

Answer:

A) Q + XZ = X + QZ is a single displacement reaction.

B) Q + Z = QZ is a synthesis reaction

C) QT = Q + T is a decomposition reaction

D) QT + XZ = QZ + XT is double replacement reaction.

Explanation:

A) Q + XZ = X + QZ

This is a single displacement reaction because it is one in which one element is substituted for another one in a compound. In this case X is substituted for Q.

B) Q + Z = QZ

This is a synthesis reaction because Q and z combine to form a single product QZ.

C) QT = Q + T

This is a decomposition reaction because the compound QT breaks down to form 2 simpler substances Q and T.

D) QT + XZ = QZ + XT

Thus is a double replacement reaction because QT and XZ have exchanged cations to form new compounds QZ and XT

6 0
3 years ago
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