The main difference between gas pressure and vapour pressure is that gas pressure is exerted by the gases above the surface of a substance whereas vapour pressure is exerted by liquids above the surface of a substance
Explanation:
a) Bohr model is perfect for atoms that have single electron and fortunately both Be3+ ion and H atom have one electron so, Bohr model can easily and accurately applied to predict the spectrum of Be3+ and H atom.
b) The energy of an atom in Bohr model is given by
the values of z for H atom and Be3+ ion are 1 and 4 respectively. Hence, energy of atoms would be different for both atoms. Hence, line spectra to be identical is not possible.
The answer is C. They lower the activation energy of an elementary step of a reaction
This makes the reaction rate to increase since less energy is required to make a reaction occur.
Explanation:
There is a clear cut difference between a compound and an element:
- A compound is made up of substances composed of two or more kinds of atoms or elements joined together in a definite grouping.
- An element is a distinct substance that cannot be split-up into simpler substances. These substances are only made up of one kind of atom.
Compounds are formed so that unstable elements can attain stability.
Carbon monoxide is made up two elements: Carbon and oxygen that have combined chemically together.
- Carbon monoxide is a toxic gas and it is different from oxygen atom and carbon atom.
- Carbon is a solid but carbon monoxide is a gas.
- Oxygen atom does not exists on its own but it exists as Oxygen gas O₂
- The properties of carbon monoxide clearly differ from that of oxygen and carbon.
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