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Which two particles each have a mass of approximately one atomic mass unit?
June 2023 NY Regents Chemistry Exam 2 Which two particles each have a mass of approximately one atomic mass unit? (1) an electron and a...
Which phrase describes the nucleus of any atom?
June 2023 NY Regents Chemistry Exam 1 Which phrase describes the nucleus of any atom? (1) has an overall positive charge (2) has an overall negative charge (3) contains negative electrons (4) contains positive electrons
Given the balanced equation representing a reaction:2NO + O2 → 2NO2 + energy The mole ratio of NO
June 2017 NY Regents Chemistry Exam 36 Given the balanced equation representing a reaction: 2NO + O2 → 2NO2 + energy The mole ratio of NO...
Given the balanced equation representing a reaction:2Na(s) + Cl2(g) → 2NaCl(s) + ener
June 2017 NY Regents Chemistry Exam 35 Given the balanced equation representing a reaction: 2Na(s) + Cl2(g) → 2NaCl(s) + energy If 46...
Given the equation representing a reaction: 2C + 3H2 → C2H6What is the number of moles of C that mu
June 2018 NY Regents Chemistry Exam 37 Given the equation representing a reaction: 2C + 3H2 → C2H6 What is the number of moles of C that...
What is the number of moles of KF in a 29-gram sample of the compound?
January 2018 NY Regents Chemistry Exam 36 What is the number of moles of KF in a 29-gram sample of the compound? (1) 1.0 mol (2) 2.0 mol...
Which equation represents a conservation of charge?
August 2018 NY Regents Chemistry Exam 36 Which equation represents a conservation of charge? Solution: Conservation of charge means that...
The empirical formula for butene is
August 2018 NY Regents Chemistry Exam 35 The empirical formula for butene is (1) CH2 (2) C2H4 (3) C4H6 (4) C4H8 Solution: An empirical...
What is the number of moles of CO2 in a 220.-gram sample of CO2 (gram-formula mass = 44 g/mol)?
January 2019 NY Regents Chemistry Exam 36 What is the number of moles of CO2 in a 220.-gram sample of CO2 (gram-formula mass = 44...
Given the reaction:2KClO3(s) → 2KCl(s) + 3O2(g)How many moles of KClO3 must completely react to pr
January 2019 NY Regents Chemistry Exam 35 Given the reaction: 2KClO3(s) → 2KCl(s) + 3O2(g) How many moles of KClO3 must completely react...
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