Hesi A2 Chemistry and biochemistry
2024
Equation for Fahrenheit to Celsius ANS: C = (F-32) 5/9
What is the SI unit used to measure amount of a substance? ANS: Mole
What is a negatively charged Ion? ANS: Anion
What is a positively charged ion? ANS: Cation
What is an isotope? ANS: Atoms with the same number of protons and electrons but different number
of neutrons
What are the names of isotopes for hydrogen? ANS: -Protium
-Deuterium
-Tritium
How many naturally occurring isotopes does carbon have?
What are they? ANS: 3 Isotopes
Carbon (12,13,14)
What is an ion? ANS: When an atom gains or loses electrons
What is represented by the atomic number (top) of an element? ANS: Protons
What is represented by the bottom number of an element? ANS: Atomic mass
,What is the phase from ice to steam? ANS: Sublimation
What is the phase from liquid to solid? ANS: Freezing
What is the phase from Solid to liquid? ANS: Melting
What is the phase from Liquid to Gas? ANS: Evaporation
What is the phase from Gas to liquid? ANS: Condensation
What is the phase from Gas to solid? ANS: Deposition
WHat does pH stand for? ANS: Potential Hydrogen
pH measures what? ANS: -Concentration of hydrogen ions
-Acidity
What is a neutral pH level? ANS: 7
What are pH levels that are acidic? ANS: below 7
What is a single covalent Bond? ANS: A bond that share 1 electron pair.
What is a double covalent bond? ANS: A bond that shares 2 pairs of electrons
, What is a catalyst? ANS: Substance that increases the rate of a chemical reaction
What type of bond exists in NaCl? ANS: Ionic
An Ionic compound involves? ANS: a positive cation metal and a negative anion non-metal
In a redox reaction, Oxidation is the _______of electrons and reduction is the __________ of electrons
ANS: Loss, Gain
OIL RIG: ANS: Oxidation Is Loss, Reduction Is Gain
A dipole ANS: -Unequal sharing of electrons between atoms in a molecule
-Both positive and a partially negative
What is the oxidation number of oxygen ANS: 2
Chemical formula of carbohydrate? ANS: CH2O
Chemical formula of glucose? ANS: C6 H12 O6
What is emitted during beta decay? ANS: Electrons
Decomposition reaction ANS: When a compound breaks to into tow or more compounds
General form of decomposition reaction? ANS: AB --> A + B
2024
Equation for Fahrenheit to Celsius ANS: C = (F-32) 5/9
What is the SI unit used to measure amount of a substance? ANS: Mole
What is a negatively charged Ion? ANS: Anion
What is a positively charged ion? ANS: Cation
What is an isotope? ANS: Atoms with the same number of protons and electrons but different number
of neutrons
What are the names of isotopes for hydrogen? ANS: -Protium
-Deuterium
-Tritium
How many naturally occurring isotopes does carbon have?
What are they? ANS: 3 Isotopes
Carbon (12,13,14)
What is an ion? ANS: When an atom gains or loses electrons
What is represented by the atomic number (top) of an element? ANS: Protons
What is represented by the bottom number of an element? ANS: Atomic mass
,What is the phase from ice to steam? ANS: Sublimation
What is the phase from liquid to solid? ANS: Freezing
What is the phase from Solid to liquid? ANS: Melting
What is the phase from Liquid to Gas? ANS: Evaporation
What is the phase from Gas to liquid? ANS: Condensation
What is the phase from Gas to solid? ANS: Deposition
WHat does pH stand for? ANS: Potential Hydrogen
pH measures what? ANS: -Concentration of hydrogen ions
-Acidity
What is a neutral pH level? ANS: 7
What are pH levels that are acidic? ANS: below 7
What is a single covalent Bond? ANS: A bond that share 1 electron pair.
What is a double covalent bond? ANS: A bond that shares 2 pairs of electrons
, What is a catalyst? ANS: Substance that increases the rate of a chemical reaction
What type of bond exists in NaCl? ANS: Ionic
An Ionic compound involves? ANS: a positive cation metal and a negative anion non-metal
In a redox reaction, Oxidation is the _______of electrons and reduction is the __________ of electrons
ANS: Loss, Gain
OIL RIG: ANS: Oxidation Is Loss, Reduction Is Gain
A dipole ANS: -Unequal sharing of electrons between atoms in a molecule
-Both positive and a partially negative
What is the oxidation number of oxygen ANS: 2
Chemical formula of carbohydrate? ANS: CH2O
Chemical formula of glucose? ANS: C6 H12 O6
What is emitted during beta decay? ANS: Electrons
Decomposition reaction ANS: When a compound breaks to into tow or more compounds
General form of decomposition reaction? ANS: AB --> A + B
