Which equation best describes the stoichiometry of the reaction? A_2 + 2B - - -

Question

Which equation best describes the stoichiometry of the reaction? A_2 + 2B - - - > A_2B_2 2A + B_2 ----> A_2B_2 2A + 2B ---> A_2B_2 5A + 5B_2 -----> 5A_2B_2 A solution contains the label 0.2 M KNO_3, What is the correct interpretation of this concentration? There are 0.2 moles of KNO_3 in 100 mL of water. There are 0.2 moles of KNO_3 in 1000 mL of solution. There are 0.2 g of KNO_3 in IL of solution? There are 0.2 molecules of KNO_3 in I L of solution. There are 0.2 g if KNO_3 in 1 L of water.

Explanation / Answer

a) The reaction is A2+2B-->A2B2

b) Molarity is defined as the number of moles of solute per liter of solution. For 0.2M KNO3, there are 0.2 M of KNO3 in 1L(1000mL) solution.( B is correct)

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