Formula bonding and nomenclature questions | form two Chemistry

The simplest formulas of a compound formed when combining 13g of aluminium and 17g of chlorine is:
A. AlCl
B. Al ₂ Cl
C. Al ₃ Cl ₂
D. AlCl ₃

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UNSOLVED

What do you understand by the following terms?
(i) Empirical formula
(ii) Relative atomic mass

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UNSOLVED

A certain compound K contains 15.8% carbon and 84.2% sulphur. The molar mass of K is 76 g/mol. Determine its:
(i) simplest formula
(ii) molecular formula

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UNSOLVED

Write the chemical formula for each of the following compounds:
(i) Sodium carbonate
(ii) Calcium nitrate
(iii) Ammonium chloride

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UNSOLVED

Calculate the percentage by composition of the underlined elements in the following compounds:

(i) Na ₂ SO ₄

(ii) Ca(HCO ₃ ) ₂

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UNSOLVED