Straighterline CHEM101 Final 2025/2026
Exam Questions and Answers | 100%
Pass
total number of neutrons and protons in an atom; # protons + # electrons - 🧠
ANSWER ✔✔Mass Number
Most nonmetallic elements are found in which block of the periodic table? - 🧠
ANSWER ✔✔p
Ernest Rutherford disproved J.J. Thomson's plum-pudding model of the atom by
showing that... - 🧠 ANSWER ✔✔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? - 🧠 ANSWER ✔✔Potassium
What is the ratio of reactants and products in the chemical equation?
__NaOH + __H2SO4 --> __Na2SO4 + __H2O - 🧠 ANSWER ✔✔2:1:1:2
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,What is Avogadro's number? - 🧠 ANSWER ✔✔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) - 🧠 ANSWER ✔✔Mg
Which arrangement accurately describes the standard entropy values at different
phases? - 🧠 ANSWER ✔✔(s) < (l) < (g)
What are the most stable isotopes? - 🧠 ANSWER ✔✔2, 8, 20, 50, 82 or 126
protons
What element has been oxidized and what element has been reduced?
3CuS + 8HNO3 --> 3CuSO4 + 8NO + 4H2O - 🧠 ANSWER ✔✔S = oxidized
N = reduced
How do you convert from moles to grams? - 🧠 ANSWER ✔✔multiply the atomic
mass (grams) by the number of moles
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
,How do you convert from grams to moles? - 🧠 ANSWER ✔✔Divide the total
number of grams by the atomic mass (grams) of 1 mole
measure of the amount of matter - 🧠 ANSWER ✔✔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 - 🧠 ANSWER ✔✔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 - 🧠
ANSWER ✔✔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 - 🧠 ANSWER ✔✔Liquid
No definite shape or volume
Conforms to shape and volume of container
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
, Particles separated by distances very large compared to size of particles - 🧠
ANSWER ✔✔Gas
Color, melting point, boiling point
Observed and measured without changing identity of substance - 🧠 ANSWER
✔✔Physical Property
Observed by performing a chemical change - 🧠 ANSWER ✔✔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 - 🧠 ANSWER ✔✔Mixture
fixed composition and differs from a mixture (every sample has same properties
and composition) - 🧠 ANSWER ✔✔Pure Substance
molecule with a charge
contain more than 1 atom chemically bonded together - 🧠 ANSWER
✔✔Polyatomic Ion
atoms with charge formed by loss or gain of an electron - 🧠 ANSWER ✔✔ions
positive ion, may have roman numeral - 🧠 ANSWER ✔✔Cation
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
4
Exam Questions and Answers | 100%
Pass
total number of neutrons and protons in an atom; # protons + # electrons - 🧠
ANSWER ✔✔Mass Number
Most nonmetallic elements are found in which block of the periodic table? - 🧠
ANSWER ✔✔p
Ernest Rutherford disproved J.J. Thomson's plum-pudding model of the atom by
showing that... - 🧠 ANSWER ✔✔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? - 🧠 ANSWER ✔✔Potassium
What is the ratio of reactants and products in the chemical equation?
__NaOH + __H2SO4 --> __Na2SO4 + __H2O - 🧠 ANSWER ✔✔2:1:1:2
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,What is Avogadro's number? - 🧠 ANSWER ✔✔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) - 🧠 ANSWER ✔✔Mg
Which arrangement accurately describes the standard entropy values at different
phases? - 🧠 ANSWER ✔✔(s) < (l) < (g)
What are the most stable isotopes? - 🧠 ANSWER ✔✔2, 8, 20, 50, 82 or 126
protons
What element has been oxidized and what element has been reduced?
3CuS + 8HNO3 --> 3CuSO4 + 8NO + 4H2O - 🧠 ANSWER ✔✔S = oxidized
N = reduced
How do you convert from moles to grams? - 🧠 ANSWER ✔✔multiply the atomic
mass (grams) by the number of moles
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
,How do you convert from grams to moles? - 🧠 ANSWER ✔✔Divide the total
number of grams by the atomic mass (grams) of 1 mole
measure of the amount of matter - 🧠 ANSWER ✔✔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 - 🧠 ANSWER ✔✔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 - 🧠
ANSWER ✔✔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 - 🧠 ANSWER ✔✔Liquid
No definite shape or volume
Conforms to shape and volume of container
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
, Particles separated by distances very large compared to size of particles - 🧠
ANSWER ✔✔Gas
Color, melting point, boiling point
Observed and measured without changing identity of substance - 🧠 ANSWER
✔✔Physical Property
Observed by performing a chemical change - 🧠 ANSWER ✔✔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 - 🧠 ANSWER ✔✔Mixture
fixed composition and differs from a mixture (every sample has same properties
and composition) - 🧠 ANSWER ✔✔Pure Substance
molecule with a charge
contain more than 1 atom chemically bonded together - 🧠 ANSWER
✔✔Polyatomic Ion
atoms with charge formed by loss or gain of an electron - 🧠 ANSWER ✔✔ions
positive ion, may have roman numeral - 🧠 ANSWER ✔✔Cation
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
4
