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NeX [460]
3 years ago
9

Please I need it asap

Chemistry
2 answers:
DaniilM [7]3 years ago
5 0

Answer:

i think is A.

Explanation:

svp [43]3 years ago
4 0

Answer:

I not understand your questions

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Plastic, rocks, rabbits and steel are all made of matter. Matter is made up of tiny particles called ________.
Sati [7]

Answer:

atoms should be the correct answer

3 0
2 years ago
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How many moles are there in 4 grams of oxygen?
kifflom [539]

Answer:

0.125

Explanation:

im not sure but if you get the grams then divide by the sufficance of xy

8 0
3 years ago
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A sample of gas occupies 1.2 L at 12.0oC. Assuming pressure remains the same, what would be the volume (in L) of this gas at 67o
liraira [26]
V1/T1 = V2/T2
V1 = 1.2 L
T1 = 12.0 + 273 = 285 K
T2 = 67.0 +273 = 340 K

1.2/285 = V2 / 340
V2 = 1.4 L
3 0
3 years ago
At a certain temperature the rate of this reaction is first order in HI with a rate constant of 0.0632 s
kirza4 [7]

Answer:

28.037\ \text{s}

Explanation:

[A]_0 = Initial concentration = 1.28 M

[A] = Final concentration = 0.17[A]_0

k = Rate constant = 0.0632 s

t = Time taken

For first order reaction we have the relation

kt=\ln\dfrac{[A]_0}{[A]}\\\Rightarrow t=\dfrac{\ln\dfrac{[A]_0}{[A]}}{k}\\\Rightarrow t=\dfrac{\ln\dfrac{[A]_0}{0.17[A]_0}}{0.0632}\\\Rightarrow t=28.037\ \text{s}

Time taken to reach the required concentration would be 28.037\ \text{s}.

8 0
3 years ago
Which, if any, of the substances had resonance structures? How many resonance structures did each substance have?
vlada-n [284]

SO2, NO2- and CO2 all have resonance structures among all the other species that were mentioned in the question.

The question is incomplete, the complete question is;

Which if any, of the substances had resonance structures? How many resonance structures did each substance have?

CCl4  ,H2O, CO2  ,H2O  ,CH4  ,C2H4  ,CH2O  ,CH3OH  ,CH3NH2  ,NF3  ,[NH4]+ ,[NO2]-  ,SO2 , OF2  ,H2S  ,SF6 , ICl5

Resonance is an idea introduced by Linus Pauling to explain the bonding in compounds where a single Lewis structure can not fully account for the bonding in the molecule. In such compounds, no single Lewis structure satisfactorily explains all the properties of the molecule.

Among the options listed, the following molecules exhibit resonance;

  • SO2 (two resonance structures)
  • NO2- (two resonance structures)
  • CO2 (three resonance structure)

Learn more: brainly.com/question/8483218

5 0
2 years ago
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