CHEM 111 Ch1 Exam #1 Question with verified answers
Define Matter - √√Occupies space (has Volume) and has mass
Define Substance - √√Matter that has chemical makeup and specific intrinsic (fixed) properties
Define Pure Substance - √√Chemical structure made of only one element or structure.
Define element - √√Something that can't be separated by chemical means; can be naturally occurring or not
Define compound - √√matter/substance made of two or more elements
Give examples of compounds - √√Water (H2O), Ammonia (NH3), Methane (CH4)
Define mixture - √√two or more substances combined (distinct identities retained! not a chemical change,
but a physical change)
What are the two types of mixtures? - √√homogeneous and heterogeneous
What is a homogeneous mixture? - √√Uniform composition (same throughout) (Liquid/Liquid, Gas/Gas)
What is a hetrogenous mixture? - √√Non-Uniform composition
Which mixture do you use filtration in? - √√Heterogenous (think pebbles and sand)
What mixture do you use distillation in? - √√Both Homo and Hetro.
What is important about Distillation? - √√Needs to be boiled
Define Physical change - √√Substance is the same (identity unchanged, different form)
Define chemical change - √√Substance identity is changed
What are the three states of matter? - √√solid, liquid, gas
What is a Gas? - √√Shape and volume change
What is a liquid? - √√Shape change, volume fixed
What is a solid? - √√shape and volume fixed
Define an intensive property and give examples - √√amount of matter does not affect change (ie: color,
density, temp)
, Define an extensive property and give examples - √√Amount of matter does effect change (ie: length,
volume, mass)
Mega prefix is? - √√M
10^6 (or 1,000,000)
Kilo prefix is? - √√k
10^3 (or 1000)
Deci prefix is? - √√d
10^ -1 (or 0.1)
Centi prefix is? - √√c
10^-2 (or 0.01)
Milli prefix is? - √√m
10^-3 (or 0.001)
micro prefix is? - √√u^b
10^-6 (or 0.000001)
nano prefix is? - √√n
10^-9 (or 0.000000001)
10^3/10^6 is what? - √√10^-3 (or 0.001)
Default SI base unit for mass is? - √√Kilogram (kg)
Default SI base unit for length? - √√Meter (m)
Default SI base unit for time? - √√second (s/sec)
Default SI base unit for temp? - √√Kelvin (k)
What is 1K? - √√273.15 degrees
Default SI base unit for amount of substance? - √√mole (or mol)
Default SI base unit for electric current? - √√Ampere (A/amp)
Default SI base unit for Luminous Intensity? - √√Candela (cd)
Default SI base unit for volume? - √√Cubic Meter (m^3)
Define Matter - √√Occupies space (has Volume) and has mass
Define Substance - √√Matter that has chemical makeup and specific intrinsic (fixed) properties
Define Pure Substance - √√Chemical structure made of only one element or structure.
Define element - √√Something that can't be separated by chemical means; can be naturally occurring or not
Define compound - √√matter/substance made of two or more elements
Give examples of compounds - √√Water (H2O), Ammonia (NH3), Methane (CH4)
Define mixture - √√two or more substances combined (distinct identities retained! not a chemical change,
but a physical change)
What are the two types of mixtures? - √√homogeneous and heterogeneous
What is a homogeneous mixture? - √√Uniform composition (same throughout) (Liquid/Liquid, Gas/Gas)
What is a hetrogenous mixture? - √√Non-Uniform composition
Which mixture do you use filtration in? - √√Heterogenous (think pebbles and sand)
What mixture do you use distillation in? - √√Both Homo and Hetro.
What is important about Distillation? - √√Needs to be boiled
Define Physical change - √√Substance is the same (identity unchanged, different form)
Define chemical change - √√Substance identity is changed
What are the three states of matter? - √√solid, liquid, gas
What is a Gas? - √√Shape and volume change
What is a liquid? - √√Shape change, volume fixed
What is a solid? - √√shape and volume fixed
Define an intensive property and give examples - √√amount of matter does not affect change (ie: color,
density, temp)
, Define an extensive property and give examples - √√Amount of matter does effect change (ie: length,
volume, mass)
Mega prefix is? - √√M
10^6 (or 1,000,000)
Kilo prefix is? - √√k
10^3 (or 1000)
Deci prefix is? - √√d
10^ -1 (or 0.1)
Centi prefix is? - √√c
10^-2 (or 0.01)
Milli prefix is? - √√m
10^-3 (or 0.001)
micro prefix is? - √√u^b
10^-6 (or 0.000001)
nano prefix is? - √√n
10^-9 (or 0.000000001)
10^3/10^6 is what? - √√10^-3 (or 0.001)
Default SI base unit for mass is? - √√Kilogram (kg)
Default SI base unit for length? - √√Meter (m)
Default SI base unit for time? - √√second (s/sec)
Default SI base unit for temp? - √√Kelvin (k)
What is 1K? - √√273.15 degrees
Default SI base unit for amount of substance? - √√mole (or mol)
Default SI base unit for electric current? - √√Ampere (A/amp)
Default SI base unit for Luminous Intensity? - √√Candela (cd)
Default SI base unit for volume? - √√Cubic Meter (m^3)
