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3 years ago

Choose the options below that are true.

Chemistry

1 answer:

Assoli18 [71]3 years ago

5 0

Answer:

The options <u>(A) -</u>The rate law for a given reaction can be determined from a knowledge of the rate-determining step in that reaction's mechanism. and <u>(C) </u>-The rate laws of bimolecular elementary reactions are second order overall ,<u>is true.</u>

Explanation:

(A) -The rate law can only be calculated from the reaction's slowest or rate-determining phase, according to the first sentence.

(B) -The second statement is not entirely right, since we cannot evaluate an accurate rate law by simply looking at the net equation. It must be decided by experimentation.

(D)-The fourth argument is incorrect. We must track the rates of and elementary phase that is following the reaction in order to determine the rate.

<u>Therefore , the first and third statement is true.</u>

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An alternative definition of electronegativity is Electronegativity= constant (I.E — E.A.) where I.E. is the ionization energy a

Kazeer [188]

Answer:

The electronengativity values of given elements is as follows.

Fluorine - 4

Chlorine -3

Bromine - 2.9

Iodine- 2.5

Explanation:

Electronegativity =consant (I.E-E.A)

The electron affinity and ionization energy values of the given elements is as follows.

(In attachment)

First we have to find the value of constant by using the fluorine atom to whom the electronengativity taken as "4".

<u>Fluorine:</u>

$4=constant[1678-(-327.8)]$

$Constant=0.0019942168$

By using this constant values we can find electronegatvity values of remaining elements.

<u>Chlorine:</u>

$Electronegativity=0.0019942168[1255+348.7]=3.1980\sim 3$

Therefore, electronegativity of chlorine is 3.

<u>Bromine:</u>

$Electronegativity=0.0019942168[1138+324.5]=2.91\sim 2.9$

Therefore, electronegativity of bromine is 2.9.

<u>Iodine:</u>

$Electronegativity=0.0019942168[1007+295.7]=2.59\sim 2.5$

Therefore, electronegativity of iodine is 2.5.

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3 years ago

How did Thomson show that cathode<br> rays are different from light?

Flura [38]

Answer:

They had a negative charge

Explanation:

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3 years ago

To which factor can the principles of Nicholas Steno be applied?

Tcecarenko [31]

Answer:

the rock layers of the Grand Canyon

Explanation:

Steno's law are laws that applied to sedimentary rocks. These laws helps in understanding sedimentary sequences.

Sedimentary rocks are derived from the deposition of pre-existing rocks in basins. In order to understand some important relationships between these rock layers, Steno's law offer a good insight.

Steno's law are often applied when we want to do relative dating of rock layers. Some of the laws are:

Law of superposition of strata
Law of original horizontality
Law of lateral continuity
Law of inclusion
Law of fossil and fauna succession

These laws helps to interpret sedimentary rock sequences better.

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4 years ago

Read 2 more answers

calculate the tonnes of co2 in the atmosphere. use the current co2 concentration of 405 ppm. Answer as tonnes as carbon.

Alex Ar [27]

Answer:

2,0894x10¹² tonnes of CO₂ in atmosphere

Explanation:

The total mean mass of the atmosphere is 5.1480×10¹⁸ kg. CO₂ is an important race gas in Earth's atmosphere because it is part of the carbon cycle.

405 ppm of CO₂ in atmosphere means 405 mg of CO₂ per kg of atmosphere. If the mass of the atmosphere is 5.1480×10¹⁸ kg:

$\frac{405mg CO_2}{1kg atmosphere} * 5,1480x10^{18} kg Atmosphere = 2,0849x10^{21}mg CO_2$

In tonnes:

$2,0849x10^{21}mg CO_2 * \frac{1kg}{1x10^{6} mg} * \frac{1 tonne}{1000 kg} =$ <em>2,0894x10¹² tonnes of CO₂ in atmosphere</em>

I hope it helps!

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3 years ago

Examine the reactants of the incomplete double displacement reaction.

Elza [17]

<h3>Answer:</h3>

The products of the reaction are; AgCl and NaNO₃

<h3>Explanation:</h3>

In this question we need to know what is a double displacement reaction;

A double displacement is a type of replacement reaction in which salts or ionic compounds exchange cations and anions to form new compounds as the products.
In this case, the complete double replacement reaction is;

AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)

The reaction is also a precipitation reaction as it forms a precipitate as one of the products that is silver chloride (AgCl).
Therefore, the products of the reaction are; AgCl and NaNO₃

5 0

4 years ago