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3 years ago

How does the number of substituents around a central atom affect the shape of a molecule?

1 answer:

4 0

Explanations:- The shape of the molecule depends on bonding groups and lone pair of electrons present in the central atom. We do the sum of these bonding groups and lone pair of electrons for the shape of the molecule. The presence of lone pair of electrons affects the shape (molecular geometry) of the molecule.

For example, methane is tetrahedral as four hydrogen atoms are bonded to carbon and there is no lone pair of electrons present on C. Here, the sum of bonding groups and lone pairs is 4.

On the other hands, in water, two H atoms are bonded to the central oxygen atom and also there are two lone pair of electrons present on oxygen atom. The sum is also 4 here but the molecular geometry is bent. The difference in geometries of these two molecules is because of the repulsion between the two lone pairs present on oxygen atom.

If we take an example of boron hydride then three H atoms are bonded to B and there is no lone pair of electrons present on B. The sum is 3 and so it's shape is trigonal planar.

So, the number of bonded atoms as well as the number of lone pairs present on the central atom decides the shape of the molecule.

If this helped, please give brainliest.

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The ph3 molecule is polar. does this offer experimental proof that the molecule cannot be planar? explain.

Alex

<span>Answer: if it was planar the center of the negative forces and the center of the positive forces would be at the same place, meaning no di-poles would form so it wouldnt be polar. as it is polar it therefore cannot be planar. the neagative center(pole) is above the the positive one due to the pair of unbonded electrons.</span>

7 0

3 years ago

1) The temperature inside my refrigerator is about 40 Celsius. If I place a balloon in my fridge that initially has a temperatur

viva [34]

Answer: The volume of the balloon when it is fully cooled by my refrigerator is 0.3 L

Explanation:

To calculate the final volume of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1=0.5L\\T_1=220^oC=(220+273)K=493K\\V_2=?\\T_2=40^oC=(40+273)K=313K$

Putting values in above equation, we get:

$\frac{0.5}{493}=\frac{V_2}{313}\\\\V_2=0.3$

Thus the volume of the balloon when it is fully cooled by my refrigerator is 0.3 L

4 0

3 years ago

What compound do cells break down for energy in the process of cellular respiration?

arsen [322]

Answer:

Glucose

Explanation:

Glucose is broken down into water and carbon dioxide.

hope this helps! :)

6 0

3 years ago

Anybody wanna do a zoom

Ksivusya [100]

For what exactly ? just for fun or for educational purposes?

8 0

3 years ago

How many moles in 3.69 x 10^30 molecules of carbon dioxide?

Sedaia [141]

$0.612 \times 10^{7} \text { moles of } \mathrm{CO}_{2}$ are present in $3.69 \times 10^{30} \text { molecules of } \mathrm{CO}_{2}$

<u>Explanation:</u>

It is known that each mole of an element is composed of avagadro's number of molecules. So if we need to determine, we need to divide the number of molecules with the avagadro's number.

So,

$1 mol of element =6.02 \times 10^{23} molecules of element$

As here $3.69 \times 10^{30}$ molecules of carbon di oxide is given. So the moles in it will be

No. of moles of carbon dioxide = $\frac{3.69 \times 10^{30}}{6.02 \times 10^{23}}$

No. of moles = $0.612 \times 10^{7}$ moles of carbon dioxide.

Thus,

$0.612 \times 10^{7}$ of carbon dioxide are present in $3.69 \times 10^{30} \text { molecules of } \mathrm{CO}_{2}$ .

4 0

3 years ago