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Stolb23 [73]
2 years ago
9

2.The rate constant of a first order reaction is 66 s-1. What is the rate constant in units of minutes

Chemistry
1 answer:
Vanyuwa [196]2 years ago
4 0

Answer:

66s^-1 will be 1/66

then to convert to minute you multiply by 69

1/66 x 60 = 3960 mins

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The half life for the first order conversion of A to B is 56.6 hours. How long does it take for the concentration of A to decrea
sveta [45]

Answer:

It will take 188.06 hours for the concentration of A to decrease 10.0% of its original concentration.

Explanation:

A → B

Initial concentration of the reactant = x

Final concentration of reactant = 10% of x = 0.1 x

Time taken by the sample, t = ?

Formula used :

A=A_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}

where,

A_o = initial concentration of reactant

A = concentration of reactant left after the time, (t)

t_{\frac{1}{2}} = half life of the first order conversion  = 56.6 hour

\lambda = rate constant

A=A_o\times e^{-(\frac{0.693}{t_{1/2}})\times t}

Now put all the given values in this formula, we get

0.1x=x\times e^{-(\frac{0.693}{56.6 hour})\times t}

t = 188.06 hour

It will take 188.06 hours for the concentration of A to decrease 10.0% of its original concentration.

4 0
3 years ago
14.28 explain how you would distinguish between each pair of compounds using high- resolution mass spectrometry
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The distinguish between each pair of compounds using high- resolution mass spectrometry by the exact mass rather than nominal mass are utilizes to measure the compound.

The mass spectrometry is involves the following steps :

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Mass spectrometry is the analytical method useful for the calculating the mass to charge ratio ( m / z ). the mass spectrometry is based on the newton's second law and the momentum.

Thus, the mass spectroscopy is method to measure the molecular mass of the compound and indirectly helps examine the isotopes and based on the newton's second law .

To learn more about mass spectroscopy here

brainly.com/question/28587595

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How much energy does it take to boil 500.g of water at its boiling point?
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Explanation:

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Which determine the charge of an atom?
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Answer:

the answer is B its the number of protons and neutrons

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Which of the following statements best describes an animal impacting the hydrologic cycle?
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Answer:

When an animal breathes out, water vapor from inside the animal's lungs is released into the air.

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The hydrologic cycle is the cycle of water movement throughout the environment. A is the only only one that "recycles" water;

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