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3 years ago

Water boils at 100°C at sea level. If the water in this experiment did not boil at 100°C, what could be the reason?

1 answer:

6 0

One reason could be that the water in this experiment, didn’t boil, but instead became a “chemical reaction” from atmospheric pressure which is normal.

While heating two different samples, of
sea level water it decides on a temperature of 102°C and the other boils at 99.2°C. Basically calculating of the percent error.

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Select the electron-domain geometry for a molecule with three bonding domains and one nonbonding domain.

mamaluj [8]

Answer: C) Tetrahedral

Explanation:

The number of electron pairs is 4 that means the hybridization will be $sp^3$ but as there are three bonding domains and one nonbonding domain, thus electronic geometry is tetrahedral and the molecular geometry will be trigonal pyramidal.

Linear electron geometry is possible when number of electron pairs is 2 and the hybridization will be $sp^2$ .

Trigonal planar geometry is possible when number of electron pairs is 3 and the hybridization will be $sp^3$ .

Trigonal bipyramidal geometry is possible when number of electron pairs is 5 and the hybridization will be $sp^3d$ .

Octahedral geometry is possible when number of electron pairs is 6 and the hybridization will be $sp^3d^2$ .

6 0

3 years ago

|A titanium ore contains rutile (TiO2) plus some oxides of iron and silica. When it is heated with

USPshnik [31]

Explanation:

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4 0

3 years ago

A laser emits a green light with wavelength of 515 nm. Calculate the frequency of this light.

pentagon [3]

Answer:

$Frequency=5.83\times 10^{14}\ Hz$

Explanation:

The relation between frequency and wavelength is shown below as:

$c=frequency\times Wavelength$

c is the speed of light having value $3\times 10^8\ m/s$

Given, Wavelength = 515 nm

Also, 1 m = $10^{-9}$ nm

So,

Wavelength = $515\times 10^{-9}$ m

Thus, Frequency is:

$Frequency=\frac{c}{Wavelength}$

$Frequency=\frac{3\times 10^8}{515\times 10^{-9}}\ Hz$

$Frequency=5.83\times 10^{14}\ Hz$

6 0

3 years ago

How many atoms in 0.026mol of Cr?

Helga [31]

Multiply avagadro’s number to the mole
(6.022x10^22) x (0.026)=1.565 x 10^22

5 0

3 years ago

Which alcohol has the strongest intermolecular force of attraction? The weakest? Explain.A. 1-PropanolB. 1-ButanolC. n-pentaneD.

Alika [10]

Explanation:

Vander waal forces are defined as the weak electric forces which tend to attract the neutral molecules towards each other in gases, liquefied and solidified gases. And, it is also present in all organic liquids and solids.

Vander wall forces are basically present in all type of molecules. More is the number of carbon atoms present in a molecule more will be the presence of Vander waal forces.

As a result, butanol will have strongest intermolecular force of attraction because it contains more number of carbon atoms and also it has more electronegative oxygen atom.

Whereas n-pentane will have the weakest intermolecular force of attraction between its atoms.

6 0

4 years ago