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Marina86 [1]
3 years ago
15

I NEED HELP WITH 1-4 PLEASE ASAP!!!

Chemistry
1 answer:
Varvara68 [4.7K]3 years ago
5 0

Answer:

1 is the same    3 is pure substance 4 is different

Explanation:

not sure about 2

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the blanket of gases that surrounds Earth and some other planets

Explanation:

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GarryVolchara [31]

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3 years ago
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Answer:

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Explanation:

6 0
3 years ago
I need to write down like meanings in those words. Please help!!
ser-zykov [4K]

Answer:

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Hope this helped!!!

3 0
3 years ago
What are the respective concentrations (m) of fe3+ and i- afforded by dissolving 0.200 mol fei3 in water and diluting to 725 ml?
Natalka [10]

Molarity = moles / liter of solution

Given, Moles of Fe³⁺ = 0.200

Volume of solution = 725 ml = 0.725 L

Conversion factor: 1000 ml = 1L

Molarity = 0.200 / 0.725 L = 0.275 M

The dissociation of Fel₃ in water is ad follows:

Fel₃ → Fe³⁺ + 3l⁻  

1 mole of Fel₃ gives 1 mole of Fe³⁺ ions  and 3 moles of l⁻  

Since the solution is 0.275 M of Fel₃, so there are 0.275 M of Fe³⁺ ions,

and (3 x 0.275 M) = 0.825 M of l⁻ ions.

7 0
3 years ago
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