Principles of Chemistry Exam 1 with
Correct Answers
Matter - correct answer-Anything that has mass and occupies space (Not weight)
Heterogeneous - correct answer-Not uniform throughout
Homogeneous - correct answer-Uniform throughout, combinations of two or more
substances but each still retains its chemical identity
Pure Substance - correct answer-Does not have variable composition
Homogeneous Mixture - correct answer-Variable composition (like a solution)
Element - correct answer-Cannot be separated into simpler substances
Compound - correct answer-Can be separated into two or more elements
Physical Change - correct answer-Changes in appearance but not composition. Ex:
water freezing
Chemical Change - correct answer-Transformation into chemically different substance.
Ex: H2+O2=H2O
Intensive Properties - correct answer-Do not depend on amount of sample being
examined
Extensive Properties - correct answer-Depends on mass of sample
Peta - correct answer-10^15
Tera - correct answer-10^12
Giga - correct answer-10^9
Mega - correct answer-10^6
Kilo - correct answer-10^3
Deci - correct answer-10^-1
, Centi - correct answer-10^-2
Milli - correct answer-10^-3
Micro - correct answer-10^-6
Nano - correct answer-10^-9
Pico - correct answer-10^-12
Femto - correct answer-10^-15
Atto - correct answer-10^-18
Zepto - correct answer-10^-21
1 Gal= - correct answer-3.7854L
1in - correct answer-2.54cm
1m - correct answer-1.6093km
1a - correct answer-10^-10 m
1lb - correct answer-453.5g
1ml - correct answer-1cm3
K = - correct answer-C+273.15
C= - correct answer-5/9(F-32)
F= - correct answer-9/5C+32
Density= - correct answer-mass/volume
Precision - correct answer-How closely individual measurements agree with one
another
Accuracy - correct answer-how closely measurements agree with the correct value
Sig Figs - correct answer-All nonzero digits are significant
a) Zeros between nonzero digits are always significant (105g)
b) Zeros at the beginning of a number are never significant (0.2)
c) Zeros at the end of the number are signficant if the number
contains a decimal point (0.0200g
Correct Answers
Matter - correct answer-Anything that has mass and occupies space (Not weight)
Heterogeneous - correct answer-Not uniform throughout
Homogeneous - correct answer-Uniform throughout, combinations of two or more
substances but each still retains its chemical identity
Pure Substance - correct answer-Does not have variable composition
Homogeneous Mixture - correct answer-Variable composition (like a solution)
Element - correct answer-Cannot be separated into simpler substances
Compound - correct answer-Can be separated into two or more elements
Physical Change - correct answer-Changes in appearance but not composition. Ex:
water freezing
Chemical Change - correct answer-Transformation into chemically different substance.
Ex: H2+O2=H2O
Intensive Properties - correct answer-Do not depend on amount of sample being
examined
Extensive Properties - correct answer-Depends on mass of sample
Peta - correct answer-10^15
Tera - correct answer-10^12
Giga - correct answer-10^9
Mega - correct answer-10^6
Kilo - correct answer-10^3
Deci - correct answer-10^-1
, Centi - correct answer-10^-2
Milli - correct answer-10^-3
Micro - correct answer-10^-6
Nano - correct answer-10^-9
Pico - correct answer-10^-12
Femto - correct answer-10^-15
Atto - correct answer-10^-18
Zepto - correct answer-10^-21
1 Gal= - correct answer-3.7854L
1in - correct answer-2.54cm
1m - correct answer-1.6093km
1a - correct answer-10^-10 m
1lb - correct answer-453.5g
1ml - correct answer-1cm3
K = - correct answer-C+273.15
C= - correct answer-5/9(F-32)
F= - correct answer-9/5C+32
Density= - correct answer-mass/volume
Precision - correct answer-How closely individual measurements agree with one
another
Accuracy - correct answer-how closely measurements agree with the correct value
Sig Figs - correct answer-All nonzero digits are significant
a) Zeros between nonzero digits are always significant (105g)
b) Zeros at the beginning of a number are never significant (0.2)
c) Zeros at the end of the number are signficant if the number
contains a decimal point (0.0200g
