An analytical chemist measures the amount of Elements ₁ and ₂ in four samples of an unknown Substance X: sample of E₁ mass mass of E₂ 1 2 3 6.7 g 15.3 g 6.4 g 14.6 g 3.0 g 6.9 g 7.3 g 16.6 g Using this information, answer the questions in the table below. 4 It's known that X contains no elements other than E, and E₂. Is X a pure substance or a mixture? If you don't have enough information to decide, choose can't decide. If you said X is a pure substance, calculate the mass of Element E₁ the analytical chemist would find in a new 10.0 g sample of X. Round your answer to 2 significant digits. O pure substance O mixture O (can't decide) g X

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".