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Chemistry
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Why do ionisation energies have a general increase across periods?

Ionisation energy is the energy required for one mole of gaseous atoms to lose one mole of electrons, hence forming one mole of gaseous ions.The ionisation energies for elements increases across the perio...

Answered by Anna P. Chemistry tutor
2032 Views

A compound is found to contain 3.1% Hydrogen, 65.3% Oxygen and 31.6% Phosphorus. Work out its empirical formula.

To answer this question, we need to know the relative number of atoms of each element present. This can be calculated by dividing the amount of an element present in the sample by the relative masses of t...

Answered by Adam B. Chemistry tutor
4960 Views

How do I systematically name alkanes?

When naming alkanes, I like to follow a set of rules:Firstly, draw out the molecule structurally showing all bonds present. Next identify the longest carbon chain. The longest carbon chain determines the ...

Answered by Nora M. Chemistry tutor
2068 Views

Describe the structure of the periodic table

The elements in the periodic table are arranged in terms of atomic number. i.e. hydrogen is first as it has 1 proton, then helium with 2, lithium with 3 etc.Elements in the same group have the same number...

Answered by Charles W. Chemistry tutor
4659 Views

What is the reaction between Zinc and Sulphuric Acid?

When a metal reacts with an acid it forms a salt and hydrogen gas.The salt will be a sulphate due to the acid being H2SO4So, Zn + H2SO

Answered by Charles W. Chemistry tutor
7490 Views

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