chemical-aritmatic

Related Questions

• Which one of the following pairs of compounds illustrates the law of multiple proportion

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• 19.7 kg of gold was recovered from a smuggler. How many atoms of gold were recovered (Au =197)

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• The simplest formula of a compound containing 50% of element $X$ (atomic mass 10) and 50% of element $Y$ (atomic mass 20) is

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• A solution containing $N{a_2}C{O_3}$ and $ NaOH $ requires 300 ml of 0.1 N HCl using phenolpthalein as an indicator. Methyl orange is then added to the above titrated solution when a further 25 ml of 0.2 N HCl is required. The amount of NaOH present in solution is $(NaOH = 40,\,N{a_2}C{O_3} = 106)$

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• A compound contains atoms of three elements in $A$, $B$ and $C$. If the oxidation number of $A$ is +2, $B$ is +5 and that of $C$ is – 2, the possible formula of the compound is

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