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nirvana33 [79]
1 year ago
5

suppose you wanted to compare two different stain removers to learn which one was better at removing food stains from clothing.

In your test, which variable would you need to control ?
Chemistry
1 answer:
Dovator [93]1 year ago
8 0

Answer:

The amount/type of stain

Explanation:

You would want to ensure that the stain was the same in both samples.  

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Fofino [41]

Answer:

d

Explanation:

i did it

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3 years ago
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Using standard reduction potentials from the ALEKS Data tab, calculate the standard reaction free energy for the following redox
stealth61 [152]

Answer:

-973 KJ

Explanation:

The balanced reaction equation is;

N2H4(aq) + 2Cl2(g) + 4OH^-(aq)---------> 4Cl-(aq) + 4H ^+(aq) + 4OH^-(aq) + N2(g)

Reduction potential of hydrazine = -1.16 V

Reduction potential of chlorine = 1.36 V

From;

E°cell= E°cathode - E°anode

E°cell= 1.36 - (-1.16)

E°cell= 2.52 V

∆G°=- nFE°cell

n= number of moles of electrons = 4

F= Faraday's constant = 96500 C

E°cell = 2.52 V

∆G°=- (4 × 96500 × 2.52)

∆G°= -972720 J

∆G°= -972.72 KJ

7 0
3 years ago
when you decrease the distance between two magnets that are repelling, you increase the magnetic force. True or false?
kupik [55]

Answer:

False that would be crazy but cool

3 0
3 years ago
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Approximately how many moles of chlorine make up 1.79 × 1023 atoms of chlorine?
e-lub [12.9K]
1.2*10^24# atoms of chlorine

Explanation:
Chlorine gas (#Cl_2#) has two atoms of elemental chlorine in a molecule, so:
#1# mol of #Cl_2# have #6*10^23# molecules of #Cl_2#
#1# molecule of #Cl_2# have #2# atoms per molucule
Then #2*6*10^23 = 1.2*10^24# atoms of chlorine in a mol of chlorine gas
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3 years ago
1. What is Chemistry?
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study of chemicals and knowing elements shirt definition of element follow me plz....

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