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Why is the boiling point of PH3 lower than that of NH3?

PH3 is not hydrogen bonded whereas NH3 is hydrogen bonded. Hydrogen bonding is the strongest type of covalent bonding.
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Answered by Anita T. • Chemistry tutor
24629 Views

0.120g of an ideal gas was introduced into a gas syringe. The volume occupied by the gas at a pressure of 1.02x10^5 Pa and temperature 20 degrees was 49.3 cm^3. Calculate the molar mass of the gas.

The ideal gas law is PV=nRT, and we know that we can achieve the molar mass through the relationship of; n=m/mr. When using the ideal gas law it is essential that we use SI units before we begin plugging in ...
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Answered by Robbie S. • Chemistry tutor
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Explain why successive ionization energies of an element increase and how they account for the existence of three main energy levels in the sodium atom

Successive ionization energies increase because for the same nuclear charge (positive pull of the nucleus) there are fewer electrons each time one is removed, thus more energy is required to remove successiv...
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Answered by Rowena G. • Chemistry tutor
43629 Views

What is the structure of fluoroform (CFH3)? Does it have a dipole, explain your answer.

CFH3 has a tetrahedral structure. It has a dipole pointing from the carbon to the fluorine because the fluorine is more electronegative than carbon. Fluorine is also much more electronegative than hydrogen s...
RC
Answered by Rosa C. • Chemistry tutor
6813 Views

Describe how an increase in temperature affects the equilibrium of the main exothermic reaction of the Haber process?

Firstly you must recognize that the reaction that is referred to is the one where nitrogen combines with hydrogen to produce ammonia: N2 + 3H2 --> 2NH3. When talking about changing conditions to a system ...
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Answered by Olavo M. • Chemistry tutor
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