January 2017 Chemistry Regents #4650
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Questions 
Answer  Links 
Explanations 
46 Given the equation representing a reaction:
Which term best describes this reaction? (1) ionization (3) oxidation (2) neutralization (4) reduction 
4  charge decreases...reduction  
3 
oxidation above reduction Table J 

48 Given the formulas representing two compounds at standard pressure:
The compounds can be differentiated by their (1) boiling points (2) gramformula masses (3) numbers of hydrogen atoms (4) percent compositions by mass of carbon 
1  different structures have different boiling points  


49 The table below shows the atomic mass and natural abundance of the
two naturally occurring isotopes of lithium.
Which numerical setup can be used to determine the atomic mass of naturally occurring lithium? (1) (7.6)(6.015 u) (92.4)(7.016 u) (2) (0.076)(6.015 u) (0.924)(7.016 u)

2  average atomic mass calculation  
50 Given the equation representing a reaction at equilibrium: According to one acidbase theory, the forward reaction is classified as an acidbase reaction because (1) H_{2}S is a H^{+} donor and CH_{3}NH_{2} is a H^{+ }acceptor (2) CH_{3}NH_{2} is a H^{+} donor and H_{2}S is a H^{+} acceptor (3) HS^{} and CH_{3}NH_{3}^{+} are both H^{+} donors (4) CH_{3}NH_{3} and HS^{} are both H^{+ }acceptors 
1  Acids are proton donors  
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