June 2024 Chemistry Regents #56-58

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Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-52 Questions 53-55 Questions 56-58 Questions 59-60 Questions 61-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-77 Questions 78-81 Questions 82-85 

 

 

 

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Question 56-58

 

 

 

 

The unbalanced equation below shows a reaction between nitrogen monoxide gas and oxygen gas to produce nitrogen dioxide gas.
                 

                       ____NO(g) + ____O2(g) --> ___ NO2(g)

55 State, in terms of reactants and product, why this reaction is a synthesis reaction.

Answer-->the reactants form 1 product

56 Balance the equation in your answer booklet for the reaction, using the smallest whole-number coefficients.

Answer-->   __2__NO(g) + __1__O2(g) --> _2__ NO2(g)

57 Determine the percent composition by mass of oxygen in the product, NO2.

(gram-formula mass = 46 g/mol).

Answer-->  69.6-70.0  ****NOT 69

                         work   ( 32.0/(14.0 +32.0)) X 100%

 

see Table F halides

 

on to Questions 59-60

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-52 Questions 53-55 Questions 56-58 Questions 59-60 Questions 61-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-77 Questions 78-81 Questions 82-85 

 

 

 

 

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