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NikAS [45]
3 years ago
12

What effect does a decrease in temperature have on the overall rate of a chemical reaction??

Chemistry
2 answers:
Yakvenalex [24]3 years ago
7 0

Answer:

A decrease in temperature changes <u>"the number of collisions between molecules.</u> The reaction rate will <u>decrease.</u>

Blank A: <u>"the number of collisions between molecules.</u>

Blank B: <u>decrease.</u>

An increase in temperature causes a rise in the energy levels of the molecules involved in the reaction, so the rate of the reaction increases. Similarly, the rate of reaction will decrease with a decrease in temperature.

san4es73 [151]3 years ago
6 0

Change in temperature affects the rate of reaction since it causes a change in the number of collisions per unit time.  These collisions cause the breaking of bonds and formation of new ones  giving out new products. An increase in temperature increases the rate of collisions hence increasing the rate of reaction while a decrease in temperature leads to a decrease in the rate of reaction due to the decreased number of collisions per unit time. thus the correct choice for blank A is: B. the number of collisions between molecules and for blank B: decrease.

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(NH4)2S(aq) + Pb(NO3)2(aq) --> 2NH4NO3 (aq) + PbS (s)

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The Olympian swam 200 meters in 20 seconds. <br> 1) velocity<br> 2) acceleration<br> 3) speed
irakobra [83]

Answer: velocity

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3 0
2 years ago
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Help PLZ!!! Which statement accurately represents the arrangement of electrons in Bohr’s atomic model? -Electrons move around th
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Answer:

electrons move around the nucleus in fixed orbits of equal amounts of energy

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Quantum Theory

7 0
3 years ago
A gas mixture at 0°C and 1.0atm contains 0.010mol of H2, 0.015mol of O2, and 0.025mol of N2. Assuming ideal behavior, what is th
Olegator [25]

Answer:

PH₂ = 0.2 atm

C) About 0.20atm, because H2 comprises 20% of the total number of moles of gas.

Explanation:

To determine the partial pressure of hydrogen gas (H2) in the mixture,

Partial pressure H₂ = Ptotal * xH₂

xH₂ = Mole fraction of H₂ = ∩H₂ / ( ∩H₂ + ∩O₂ + ∩N₂)

xH₂ = 0.01 / (0.01 + 0.015 + 0.025)

xH₂ = 0.01/0.05

xH₂ = 0.2

therefore

PH₂ = pT * xH₂

PH₂ = 1.0 atm * 0.2

PH₂ = 0.2 atm

so the correct option is C)  About 0.20atm, because H2 comprises 20% of the total number of moles of gas.

7 0
3 years ago
The molecule below contains both an aldehyde and a ketone functional group. select only the carbonyl carbon atom of the aldehyde
4vir4ik [10]
Carbonyl compounds are those compounds in which carbon aton is doubly bonded to oxygen atom.
The hybridization of carbon and oxygen in carbonyl compounds is Sp². Folowing are examples of carbonyl compounds,
                                             
                                               1. Ketones
                                               2. Aldehydes
                                               3. Carboxylic Acids
                                               4. Acyl Halides
                                               5. Amides
                                               6. Esters
                                               7. Anhydrides e.t.c
Result:
          In given the structure the carbonyl groups are highlighted RED, as shown below.

7 0
3 years ago
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