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3 years ago

Select the correct answer.

Chemistry

1 answer:

tatyana61 [14]3 years ago

6 0

Answer:

E. Evaluate.

Explanation:

Adaptive management can be defined as a strategic technique or approach which typically involves the process of controlling, monitoring, evaluating and improving management resources, policies and procedures (practices) by learning from previous outcomes (experience).

The main purpose of an adaptive management is to help a business firm or company to effectively reduce uncertainty in the day-to-day running of the business.

Hence, the evaluation stage of an adaptive management helps us to understand what objectives are actually met. At this stage, a manager is saddled with the responsibility of identifying which set objective was actually met by the employees and the company as a whole.

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The mass spectrum of an unknown compound has a molecular ion peak with a relative intensity of 57.10% and an M+1 peak of 6.83%.

max2010maxim [7]

There are 11 Carbon atoms in the compound.

<u>Solution:</u>

Carbon atom count is the ratio of the M peak to the M+1 peak.

$\text{ Number of Carbon atoms }=\frac{\text { Relative intensity of } M+1 \text { peak }}{0.011 \times \text { Relative tntensity of } M \text { peak }}$

Here M peak is 57.10% and M+1 peak is 6.83%. On applying the values in the formula we get,

$\frac{0.0683}{0.011\times0.571g} = 10.87\approx11$

Therefore, the number of Carbon atoms in the compound are 11.

Refer the image attached below for a better understanding of M peak and M+1 peak.

The heaviest ion that has the greatest m/z value is said to be the molecular ion peak in mass spectrum.

6 0

3 years ago

A solution is made by mixing 55.g of thiophene C4H4S and 65.g of acetyl bromide CH3COBr.

EleoNora [17]

Answer:

Mole fraction of C₄H₄S = 0.55

Explanation:

Mole fraction is moles of solute / Total moles

Total moles are the sum of moles of solute + moles of solvent.

Let's find out the moles of our solute and our solvent.

Mass of solute: 55g

Mass of solvent: 65g

Mol = Mass / molar mass

55 g / 84.06 g/mol = 0.654 moles of C₄H₄S

65 g /123 g/mol = 0.529 moles of C₂H₃BrO

Total moles = 0.654 + 0.529 = 1.183 moles

Mole fraction of thiophene = Moles of tiophene / Total moles

0.654 / 1.183 = 0.55

4 0

3 years ago

Please help me don’t scam

rosijanka [135]

Answer:b

Explanation:

4 0

3 years ago

Enter an equation for the formation of NO2(g) from its elements in their standard states. Express your answer as a chemical equa

kkurt [141]

The standard state of the elements Nitrogen and Oxygen are N2 and O2, knowing that they are diatomic elements. With that piece of information, the unbalanced equation for the formulation of NO2(g) should be as follows -

N2 + O2 ---> NO2

And if you include their states -

N2 ( g ) + O2 ( g ) ---> NO2 ( g )

To balance this chemical equation consider the number of reactants and products on other side of the equation. If you were to include a coefficient of one - half with respect to N2 on the reactant side, it would balance the reactants and products -

7 0

3 years ago

Which is one way that Dalton's atomic theory has been shown to be incorrect?

KATRIN_1 [288]

The answer is D. His belief is was that atoms could not be split. That is what was disproved really fast ;)

6 0

3 years ago