Why CH4 has a lower boiling point than CF4

Answers

Answer 1

Answer: Methane,CH4,has a lower boiling point than CF4 because it is a tetrahedral molecule with four equivalent C-H bonds. It's electronic structure is described by four bonding molecular orbitals (MOs) resulting from the overlap of the valence orbitals on C and H. The lowest energy MO is the result of the overlap of the 2s orbital on carbon with the in-phase combination of the 1s orbitals on the four hydrogen atoms.

It is a colorless, natural gas, and can breaks down atom creates CH3 with water vapor that Carbon tetrafluoride,CF4, don't have that has a high bond strength due to its nature of the carbon-fluorine bond and is a potent greenhouse gas.

Answer 2

Answer:

CH4 has a lower boiling point than CF4 because it is a tetrahedral molecule with four equivalent C-H bonds.

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Determine the mass of iron in 79.2 g of Fe2O3.

Answers

55.4-g Fe.
Begin by balancing the equation:
2 Fe2O3 —> 4 Fe + 3 O2
Start your stoic:
(79.2g Fe2O3) <—- you start with what you have and always try to get rid of what unit you are at

Conversion to get rid of grams is
# grams over mole
^
This number comes from periodic table
Add whole mass of Fe2O3= 159.697g

(79.2g Fe2O3)(. mole. )
(159.697g)
Now get rid of moles, this is where you used the balanced numbers at the beginning
The number you are looking for goes on top—> (4 moles Fe)
(2 moles Fe2O3)
Last get mass of Fe alone and plug in to calc
Whole equation:
(79.2g)( moles)(4mFe)(55.85gFe)
(159.697)(2mole)(mole)

79.2 divides by 159.697 multiplied by 4 divided by 2 multipled by 55.85 equals 55.396406 rounded to:
55.4 g Fe

Answer: The mass of iron present is 55.40 g

Explanation:

We know that:

Molar mass of iron (III) oxide = 159.7 g/mol

Molar mass of iron = 55.85 g/mol

We are given:

Mass of iron (III) oxide = 79.2 g

To calculate the mass of iron in given amount of iron (III) oxide, we use unitary method:

In 159.7 grams of iron (III) oxide, the mass of iron is (2 × 55.85) = 111.7 g

So, in 79.2 grams of iron (III) oxide, the mass of iron will be = $(111.7)/(159.7)* 79.2=55.40g$

Hence, the mass of iron present is 55.40 g

What process causes dissolved substances to be left behind to form minerals after water in lakes or ponds evaporates?

Answers

well in this case its percipitation rain hail sleet snow itll set like water after so long it dissolve itll turn into gases

Which type of bond is most likely to occur in the compound mgcl2?

Answers

An ionic bond because Magnesium is a metal and Chlorine is a nonmetal, because mg has a +2 charge and chlorine has a -1 charge then mg would hand out the electrons from its outermost orbital and hand them off to the 2 chlorine atoms.

Iron in the form of fine wire burns in oxygen to form iron (III) oxide. Write the balanced chemical equation.

Answers

$2Fe+3O_2=2Fe_2O_3$

The orbits of the planets in our solar system arenot
a Elliptical, circular
b Circular, elliptical
C Circular, oval
d None of the above

Answers

Answer:

Explanation:

I don't know how to say how I got it.

Answer:

Explanation:

the orbits of the planets in our circular elliptical and circular

Hanna hypothesizes that granite is denser than sandstone. How can Hanna test her hypothesis?

Answers

To test if the hypothesis is correct, a good way is to think of it this way:
Density = mass/volume, right?
Calculate the mass and volume of each and do the equation; this will test your hypothesis.
You will be left with the density of each. But, make sure that the sample sizes are the same (controlled variable) otherwise it will be an unfair test.

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