HESI A2: Chemistry
What are all metric measurements composed of? - ANSMetric prefix and a basic unit of
measure
What is the most commonly used temperature scale in the scientific community? -
ANSCelsius or Centigrade
The nucleus of an atom contains or is made up of which of the following? - ANSProtons and
neutrons
What is an atom that has a positive charge called? - ANSA cation
In the periodic table, what are the rows called? - ANSPeriods
What is the atomic number? - ANSNumber of protons
Which of the following describes the atomic mass? - ANSAverage mass of that element's
isotopes
Chemical equations are written in which manner? - ANSReactants -> Products
What is the charge on potassium in the compound KCl? - ANS+1
A catalyst is a substance that accelerates a reaction by which of the following? - ANSFinding
an alternate pathway for a reaction that requires less energy
Percent concentration of a solution is expressed as which of the following? - ANSParts per
100 parts
What will one liter of a molar solution of any element contain? - ANSThe atomic mass in
grams of that element
Chemical bonding is the bonding of which of the following? - ANSOne atom to another atom
Which of the following describes an ionic bond? - ANSIt does not share electrons
What is the concentrationof 58.5 g of NaCl in 2 L of solution (atomic weights of each
elements are as follows: Na=23g/mol, Cl=35.5g/mol)? - ANS0.5 mol NaCl
In a redox reaction, which of the following describes reduction? - ANSIt is the gain of
electrons
What are acids? - ANSHydrogen donors
What are all metric measurements composed of? - ANSMetric prefix and a basic unit of
measure
What is the most commonly used temperature scale in the scientific community? -
ANSCelsius or Centigrade
The nucleus of an atom contains or is made up of which of the following? - ANSProtons and
neutrons
What is an atom that has a positive charge called? - ANSA cation
In the periodic table, what are the rows called? - ANSPeriods
What is the atomic number? - ANSNumber of protons
Which of the following describes the atomic mass? - ANSAverage mass of that element's
isotopes
Chemical equations are written in which manner? - ANSReactants -> Products
What is the charge on potassium in the compound KCl? - ANS+1
A catalyst is a substance that accelerates a reaction by which of the following? - ANSFinding
an alternate pathway for a reaction that requires less energy
Percent concentration of a solution is expressed as which of the following? - ANSParts per
100 parts
What will one liter of a molar solution of any element contain? - ANSThe atomic mass in
grams of that element
Chemical bonding is the bonding of which of the following? - ANSOne atom to another atom
Which of the following describes an ionic bond? - ANSIt does not share electrons
What is the concentrationof 58.5 g of NaCl in 2 L of solution (atomic weights of each
elements are as follows: Na=23g/mol, Cl=35.5g/mol)? - ANS0.5 mol NaCl
In a redox reaction, which of the following describes reduction? - ANSIt is the gain of
electrons
What are acids? - ANSHydrogen donors
