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Maurinko [17]
3 years ago
7

Need these ASAP ignore the use evidence from the text in question 1

Chemistry
1 answer:
mr Goodwill [35]3 years ago
6 0
It requires more energy to boil an substance than to melt it (with special exceptions). When something is boiled you are furthering the distance between the already stretched out molecules which will require more energy to do so, also in most cases you will be creating a vapor from boiling which has a high kinetic energy value.
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To find the formula of a compound composed of iron and carbon monoxide, Fex(CO)y, the compound is burned in pure oxygen, an reac
Anarel [89]

Answer:

The empirical formula is: Fe(CO)₅

Explanation:

According the global reaction:

Feₓ(CO)y + O₂ → Fe₂O₃ + CO₂

You should calculate Fe₂O₃ and CO₂ moles, thus:

0,799 Fe₂O₃ grams  × \frac{1 mole}{159.69 Fe2O3 g} = 5,00×10⁻³ Fe₂O₃ moles

2,200 CO₂ grams  × \frac{1 mole}{44,01 CO2 g} = 5,00×10⁻²CO₂ moles

The ratio between Fe₂O₃ moles and CO₂ moles is 1:10. Thus ratio between x and y must be 1:5 because Fe₂O₃ has 2 irons but CO₂ has just one carbon.

Assuming the formula is Fe₁(CO)₅ the molecular weight is 195,9 g/mol. Thus:

1,959 Fe(CO)₅ grams  × \frac{1 mole}{195,9 Fe(CO)5 g} = 1,00×10⁻² Fe(CO)₅ moles

Thus, assuming 1,00×10⁻² moles as basis for calculation, the global reaction is:

1 Fe(CO)₅ + ¹³/₂O₂ → ¹/₂ Fe₂O₃ + 5 CO₂

With this balanced equation the moles produced have sense, thus, the empirical formula is: Fe(CO)₅

I hope it helps!

8 0
3 years ago
PLEASE HELP ASAP!!!!!!
wariber [46]

Answer:

D 17 amu

Explanation:

because all you have to do is add 9+8=17 :)

5 0
3 years ago
Read 2 more answers
8.5C
DENIUS [597]

Answer:

i.e belongs to same group because of valence electrons are same

Explanation:

so it has same chemical behaviour. and q has more energy than r ionisation energy decreases from top to bottom

3 0
3 years ago
What is the wavelength (in nanometers) of light having a frequency of 3.9 x 1013 Hz?
Marta_Voda [28]
Yea I think the light is to fast
5 0
3 years ago
Which property of gases best explains the ability of air bags to cushion the force of impact during a car accident?
PolarNik [594]
Gases are compressible
6 0
3 years ago
Read 2 more answers
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