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3 years ago

In what situation would an interviewer want to provide the interviewee a list of questions before the interview ?

Chemistry

2 answers:

Firdavs [7]3 years ago

7 0

Answer: Option (A) is the correct answer.

Explanation:

When the questions are technical and may require some research from the interviewee then an interviewer want to provide the interviewee a list of questions before the interview.

As only in this case, interviewer wants the interviewee to take some time in order to think about the particular question and then answer it appropriately.

As if there is no list of questions then there are changes that interviewee will forget about some useful point which is important to keep in mind before answering.

marysya [2.9K]3 years ago

3 0

Answer:

Explanation:

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What are the reactants and products when butane combusts with excess oxygen?

larisa86 [58]

C3H8 + O2 --> CO2(g) + H2O(g) + energy(heat)

butane + oxygen --> carbon dioxide + water + heat

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3 years ago

How many half-lives are required for the concentration of reactant to decrease to 1.56% of its original value?4247.56.56

neonofarm [45]

Answer:

6 half-lives are required for the concentration of reactant to decrease to 1.56% of its original value.

Explanation:

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration

Given:

Concentration is decreased to 1.56 % which means that 0.0156 of $[A_0]$ is decomposed. So,

$\frac {[A_t]}{[A_0]}$ = 0.0156

Thus,

$\frac {[A_t]}{[A_0]}=e^{-k\times t}$

$0.0156=e^{-k\times t}$

kt = 4.1604

The expression for the half life is:-

Half life = 15.0 hours

$t_{1/2}=\frac {ln\ 2}{k}$

Where, k is rate constant

So,

$k=\frac {ln\ 2}{t_{1/2}}$

$\frac{4.1604}{t}=\frac {ln\ 2}{t_{1/2}}$

$t = 6\times t_{1/2}$

<u>6 half-lives are required for the concentration of reactant to decrease to 1.56% of its original value.</u>

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3 years ago

Write the electronic configuration of the Na +, Mg2 +, Ca2 + and Rb + ions.

satela [25.4K]

Answer:

pen

Explanation:

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3 years ago

Which statements below describe the law of conservation of mass? *

topjm [15]

Answer:

Mass cannot be created or destroyed

Explanation:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

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3 years ago

Which do you think has more mass, 1 mole of fructose, 1 mole of sucrose or 1 mole of aspartame? Explain your reasoning.

pogonyaev

Answer:

i think they would be all the same

Explanation:

they sound like sugars

6 0

2 years ago

Read 2 more answers