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List four reasons to support that water is a compound and not a mixture.
Which of the following is an example of a compound?
An element 'X' forms an oxide with formula X₂O₃
Write the chemical formula and calculate the molar mass of the following:
A compound was found to contain carbon and hydrogen in the ratio of carbon 12 g and hydrogen 4 g. What is the formula of the compound?
Write the molecular formulae of all the compounds that can be formed by the combination of the following ions: Cu²⁺, Na⁺, Fe³⁺, Cl⁻, SO₄²⁻, PO₄³⁻
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