Straighterline CHEM101 Final
total number of neutrons and protons in an atom; # protons + # electrons - answers✔✔Mass Number
Most nonmetallic elements are found in which block of the periodic table? - answers✔✔p
Ernest Rutherford disproved J.J. Thomson's plum-pudding model of the atom by showing that... -
answers✔✔Positive matter is concentrated in the central core
Plants use up copious amounts of which alkali metal, preventing most of it from being washed out to
sea? - answers✔✔Potassium
What is the ratio of reactants and products in the chemical equation?
__NaOH + __H2SO4 --> __Na2SO4 + __H2O - answers✔✔2:1:1:2
What is Avogadro's number? - answers✔✔the number of ATOMS in 12g of Carbon-12
1 g = 6.022 × 1023 amu
What is the reducing agent in the following equation?
Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g) - answers✔✔Mg
Which arrangement accurately describes the standard entropy values at different phases? -
answers✔✔(s) < (l) < (g)
What are the most stable isotopes? - answers✔✔2, 8, 20, 50, 82 or 126 protons
What element has been oxidized and what element has been reduced?
,3CuS + 8HNO3 --> 3CuSO4 + 8NO + 4H2O - answers✔✔S = oxidized
N = reduced
How do you convert from moles to grams? - answers✔✔multiply the atomic mass (grams) by the
number of moles
How do you convert from grams to moles? - answers✔✔Divide the total number of grams by the atomic
mass (grams) of 1 mole
measure of the amount of matter - answers✔✔Mass
made from atoms of 2+ elements that are chemically bonded; cannot be separated into simpler
substances by any physical process; can be separated by a chemical reaction - answers✔✔Compound
Definite shape and volume
Doesn't conform to shape of container
Particles are very close together in orderly fashion with little freedom of motion - answers✔✔Solid
Definite volume, indefinite shape
Conforms to shape of the part of the container it fills
Particles are close together but not rigidly in position with freedom to move past each other -
answers✔✔Liquid
No definite shape or volume
Conforms to shape and volume of container
Particles separated by distances very large compared to size of particles - answers✔✔Gas
Color, melting point, boiling point
Observed and measured without changing identity of substance - answers✔✔Physical Property
, Observed by performing a chemical change - answers✔✔Chemical Property
Combination of 2+ elements, each retains its identity and properties
Can be separated by physical means into pure components without changing identity of compounds -
answers✔✔Mixture
fixed composition and differs from a mixture (every sample has same properties and composition) -
answers✔✔Pure Substance
molecule with a charge
contain more than 1 atom chemically bonded together - answers✔✔Polyatomic Ion
atoms with charge formed by loss or gain of an electron - answers✔✔ions
positive ion, may have roman numeral - answers✔✔Cation
negative ion, element ends in -ide - answers✔✔Anion
atom of an element that has a different mass because of a different number of neutrons, but same
atomic number - answers✔✔isotope
total number of protons in an atom; also indicates number of electrons - answers✔✔Atomic Number
additional reactant that increases the rate of a reaction with a lower activation energy -
answers✔✔Catalyst
What 4 factors impact the rate of a reaction? - answers✔✔Surface area
Concentration
Temperature
total number of neutrons and protons in an atom; # protons + # electrons - answers✔✔Mass Number
Most nonmetallic elements are found in which block of the periodic table? - answers✔✔p
Ernest Rutherford disproved J.J. Thomson's plum-pudding model of the atom by showing that... -
answers✔✔Positive matter is concentrated in the central core
Plants use up copious amounts of which alkali metal, preventing most of it from being washed out to
sea? - answers✔✔Potassium
What is the ratio of reactants and products in the chemical equation?
__NaOH + __H2SO4 --> __Na2SO4 + __H2O - answers✔✔2:1:1:2
What is Avogadro's number? - answers✔✔the number of ATOMS in 12g of Carbon-12
1 g = 6.022 × 1023 amu
What is the reducing agent in the following equation?
Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g) - answers✔✔Mg
Which arrangement accurately describes the standard entropy values at different phases? -
answers✔✔(s) < (l) < (g)
What are the most stable isotopes? - answers✔✔2, 8, 20, 50, 82 or 126 protons
What element has been oxidized and what element has been reduced?
,3CuS + 8HNO3 --> 3CuSO4 + 8NO + 4H2O - answers✔✔S = oxidized
N = reduced
How do you convert from moles to grams? - answers✔✔multiply the atomic mass (grams) by the
number of moles
How do you convert from grams to moles? - answers✔✔Divide the total number of grams by the atomic
mass (grams) of 1 mole
measure of the amount of matter - answers✔✔Mass
made from atoms of 2+ elements that are chemically bonded; cannot be separated into simpler
substances by any physical process; can be separated by a chemical reaction - answers✔✔Compound
Definite shape and volume
Doesn't conform to shape of container
Particles are very close together in orderly fashion with little freedom of motion - answers✔✔Solid
Definite volume, indefinite shape
Conforms to shape of the part of the container it fills
Particles are close together but not rigidly in position with freedom to move past each other -
answers✔✔Liquid
No definite shape or volume
Conforms to shape and volume of container
Particles separated by distances very large compared to size of particles - answers✔✔Gas
Color, melting point, boiling point
Observed and measured without changing identity of substance - answers✔✔Physical Property
, Observed by performing a chemical change - answers✔✔Chemical Property
Combination of 2+ elements, each retains its identity and properties
Can be separated by physical means into pure components without changing identity of compounds -
answers✔✔Mixture
fixed composition and differs from a mixture (every sample has same properties and composition) -
answers✔✔Pure Substance
molecule with a charge
contain more than 1 atom chemically bonded together - answers✔✔Polyatomic Ion
atoms with charge formed by loss or gain of an electron - answers✔✔ions
positive ion, may have roman numeral - answers✔✔Cation
negative ion, element ends in -ide - answers✔✔Anion
atom of an element that has a different mass because of a different number of neutrons, but same
atomic number - answers✔✔isotope
total number of protons in an atom; also indicates number of electrons - answers✔✔Atomic Number
additional reactant that increases the rate of a reaction with a lower activation energy -
answers✔✔Catalyst
What 4 factors impact the rate of a reaction? - answers✔✔Surface area
Concentration
Temperature
