June 2023 Chemistry Regents #74-78

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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 53-54 Questions 55-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-69 Questions 70-73 Questions 74-78 Questions 79-81 Questions 82-85  

  

 

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Question 74-78

 

 

As plants grow, light energy is converted into chemical energy during the process of photosynthesis. The reaction produces glucose and oxygen. The balanced equation below represents photosynthesis.

6 CO2 + 6 H2O + light energy --> C6H12O6 + 6 O2

 

 

 

74 State the molecular polarity for each reactant in the equation.

Answer--> H2O -polar   CO2 - nonpolar

75 In the space in your answer book, draw the Lewis-dot diagram for water.

Answer-->link

76 Based on Table S, compare the strength of attraction for electrons of a carbon atom with the strength of attraction of a for electron of an oxygen atom in a bond between them.

Answer-->oxygen has a stronger attraction than carbon

(electronegativity comparison questions)

77

State, in terms of element classification, why CO2 is  molecular compound.

Answer--> Carbon and oxygen are both nonmetals

78

Write the empirical formula for glucose.

Answer-->CH2O  or C1H2O1

Questions 79-81

 

  

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 53-54 Questions 55-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-69 Questions 70-73 Questions 74-78 Questions 79-81 Questions 82-85  

 

 

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