Select the correct answer.

Chemistry

2 answers:

Dima020 [189]4 years ago

5 0

Answer:

C. Their components can be separated by physical processes.

Explanation:

Eddi Din [679]4 years ago

4 0

Answer:

C. Their components can be separated by physical processes.

Explanation:

The components of any mixture can be separated by physical means.

A. is wrong. This is a property of heterogeneous mixtures.

B. is wrong. This is a property of compounds.

D. is wrong. For example, air is a mixture of gases and brass is a mixture of solids.

E. is wrong. Only elements and compounds are pure substances.

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Part III.The two reactions involved in quantitatively determining the amount of iodate in solution are: IO3-(aq) 5 I-(aq) 6 H (a

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Answer:

$\large \boxed{\math{\dfrac{\text{6 mol thiosulfate}}{\text{1 mol iodate}}}}$

Explanation:

The I₂ is the common substance in the two equations.

(1) IO₃⁻ + 5I⁻ + 6H⁺ ⟶ 3I₂ + 3H₂O

{2) I₂ + 2S₂O₃²⁻ ⟶ 2I⁻ + S₄O₆²⁻

From Equation (1), the molar ratio of iodate to iodine is

$\dfrac{\text{I}_{2}}{\text{IO}_{3}^{-}} = \dfrac{3}{1}$

From Equation (2), the molar ratio of iodine to thiosulfate is

$\dfrac{\text{S$_{2}$O}_{3}^{2-}}{\text{I}_{2}} = \dfrac{2}{1}$

Combining the two ratios, we get

$\text{Stoichiometric factor} = \dfrac{\text{S$_{2}$O}_{3}^{2-}}{\text{IO}_{3}^{-}} = \dfrac{\text{S$_{2}$O}_{3}^{2-}}{\text{I}_{2}} \times \dfrac{\text{I}_{2}}{\text{IO}_{3}^{-}} = \dfrac{2}{1} \times \dfrac{3}{1} = \mathbf{\dfrac{6}{1}}\\\\\text{The stoichiometric factor is $\large \boxed{\mathbf{\dfrac{\text{6 mol thiosulfate}}{\text{1 mol iodate}}}}$}$

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TIMED CHEMISTRY PLZ HELP How many selenium atoms are in the chemical formula for the compound formed when selenium is combined w

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Explanation:

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