January 2018 NY Regents Chemistry Exam 18 The energy absorbed and the energy released during a chemical reaction are best represented by...

January 2018 NY Regents Chemistry Exam 17 A chemical reaction is most likely to occur when the colliding particles have the proper (1)...

January 2018 NY Regents Chemistry Exam 13 Compared to a 15-gram sample of Cu(s) at 25°C, a 25-gram sample of Cu(s) at 25°C has (1) the...

January 2018 NY Regents Chemistry Exam 12 Which term represents the strength of the attraction an atom has for the electrons in a...

January 2018 NY Regents Chemistry Exam 11 Given the equation representing a reaction: O + O → O2 Which statement describes the changes...

January 2018 NY Regents Chemistry Exam 6 Which formula is an empirical formula? (1) N2O4 (2) NH3 (3) C3H6 (4) P4O10 Solution: Empirical...

January 2018 NY Regents Chemistry Exam 5 What is the chemical formula for ammonium sulfide? Solution: The formula for ammonium can be...

August 2018 NY Regents Chemistry Exam 47 Which metal reacts spontaneously with NiCl2(aq)? (1) Au(s) (2) Cu(s) (3) Sn(s) (4) Zn(s)...

August 2018 NY Regents Chemistry Exam 45 In a laboratory activity, the density of a sample of vanadium is determined to be 6.9 g/cm3 at...

August 2018 NY Regents Chemistry Exam 43 The equation below represents a reaction between two molecules, X2 and Z2. These molecules form...