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Anna35 [415]
4 years ago
13

A cube of salt is crushed before being stirred into water.

Chemistry
2 answers:
andrew-mc [135]4 years ago
7 0
Physical change

Giddy Up!!!!!
Firlakuza [10]4 years ago
5 0
Its a physical change because when you brake down something and it can not turn back into the same shape.
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The standard free energy change for a reaction can be calculated using the equation
snow_lady [41]

Answer:

a) 1,737 kJ

b) -1,93 kJ

Explanation:

The standard free energy change (ΔG) can be determined using:

ΔG = -nFE

a) For the reaction:

Fumarate²⁻ + CoQH₂ ⇄ succinate²⁻ + CoQ

The transferred electrons are 2, As E=-0,009V:

ΔG = -2×96,5kJ/molV×-0,009V

<em>ΔG = 1,737 kJ</em>

b) For the reaction:

cytc1 (Fe²⁺) + cytc (Fe³⁺) ⇄ cytc1 (Fe³⁺) + cytc (Fe²⁺)

The transferred electron is n=1 and E=0,02V:

ΔG = -1×96,5kJ/molV×0,02V

<em>ΔG = -1,93 kJ</em>

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I hope it helps!

7 0
4 years ago
Hydrocarbons with only single bonds are ______.
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3 years ago
All organic molecules have what element in common
joja [24]

Every organic molecules/compound contains carbon (c).

Some other very abundant are hydrogen, nitrogen, oxygen, phosphorus, and sulfur.

I learned this with the acronym CHNOPS.

C - Carbon

H - Hydrogen

N - Nitrogen

O - Oxygen

P - Phosphorus

S - Sulfur

Hope this helps!


6 0
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No clue what it is xd
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