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An empirical formula is the simplest whole number ratio of atoms of each element present in the compound.1) Divide by atomic relative mass to find the number of moles. 2) Find a ratio between the moles. 3...
The first thing to do in any calculations question is to list out what you have, and what the question is asking you. In this case, the question wants pH, which is -log[H+]. So what we need is [H+]. We ha...
In phenol, one of the lone pairs of electrons in a p-orbital of the oxygen atom in the -OH group overlaps with the delocalised ring of electrons in the ring. This lone pair is partially d...
Ionic substances have high melting points because a lot of energy is required to break the strong, electrostatic forces of attraction between the oppositely charged ion in the ionic substance.
The numbers 35 and 37 are the mass numbers for the two isotopes of chlorine. They both have the same atomic number(proton number) as they are the same element, hence they also have the same number of elec...
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