Rio Salado CHM 130 Midterm Objectives
Questions And Answers 100% Verified
2024.
Chemistry - correct answer. A science that studies the composition of substances and
the way they interact with other substances.
Steps of the Scientific Method - correct answer. 1. Observation
2. Hypothesis
3. Experiment
4. Conclusion
Metric system - correct answer. Length (meter), Volume (liter), Mass (gram), Temp.
(C), Time (second)
SI system - correct answer. Length (meter), Volume (cubic meter), Mass (kilogram),
Temp. (kelvin), Time (second)
Scientific Notation - correct answer. a coefficient, a power of 10, and a unit of
measurement. (Ex. 8.6 x 10-4 g)
Measured Number - correct answer. numbers you obtain when you measure a
quantity using a measuring tool
Significant Figures - correct answer. are all the digits including the estimated digit. All
nonzero numbers are counted as significant figures.
Exact Numbers - correct answer. numbers obtained by counting items or using a
definition that compares two units in the same measuring system.
Kilo- - correct answer. 1 000
, mega- - correct answer. 1 000 000
deci- - correct answer. 0.1
centi- - correct answer. 0.01
milli- - correct answer. 0.001
micro- - correct answer. 0.000 001
Conversion Factors - correct answer. An equality written as a fraction.
Density - correct answer. mass/volume (Ex. 68 g/9.5 mL)
Matter - correct answer. the material that makes up a substance and has mass and
occupies space
Pure substance - correct answer. A type of matter composed of elements and
compounds that has a definite composition
Mixture - correct answer. the physical combination of two or more substances that
does not change the identities of the mixed substances
Elements vs. Compounds - correct answer. Elements are pure substances containing
only 1 type of matter, which cannot be broken down by chemical methods.
Compounds are our substances that contain 2 or more elements, with a definite
composition, the can be broken down to simpler substances only by chemical methods.
Homogeneous mixture - correct answer. the composition of the substance in the
mixture is uniform (ex. air, seawater)
Heterogeneous mixture - correct answer. the components of the mixture are visible
(ex. oil and water)
Physical properties - correct answer. can be observed or measured without affecting
the identity of the substance.
Chemical properties - correct answer. indicate the ability of a substance to change to
a new substance
Chemical change - correct answer. a change during which the original substance is
converted into a new substance that has a different composition and new chemical and
physical properties.
Questions And Answers 100% Verified
2024.
Chemistry - correct answer. A science that studies the composition of substances and
the way they interact with other substances.
Steps of the Scientific Method - correct answer. 1. Observation
2. Hypothesis
3. Experiment
4. Conclusion
Metric system - correct answer. Length (meter), Volume (liter), Mass (gram), Temp.
(C), Time (second)
SI system - correct answer. Length (meter), Volume (cubic meter), Mass (kilogram),
Temp. (kelvin), Time (second)
Scientific Notation - correct answer. a coefficient, a power of 10, and a unit of
measurement. (Ex. 8.6 x 10-4 g)
Measured Number - correct answer. numbers you obtain when you measure a
quantity using a measuring tool
Significant Figures - correct answer. are all the digits including the estimated digit. All
nonzero numbers are counted as significant figures.
Exact Numbers - correct answer. numbers obtained by counting items or using a
definition that compares two units in the same measuring system.
Kilo- - correct answer. 1 000
, mega- - correct answer. 1 000 000
deci- - correct answer. 0.1
centi- - correct answer. 0.01
milli- - correct answer. 0.001
micro- - correct answer. 0.000 001
Conversion Factors - correct answer. An equality written as a fraction.
Density - correct answer. mass/volume (Ex. 68 g/9.5 mL)
Matter - correct answer. the material that makes up a substance and has mass and
occupies space
Pure substance - correct answer. A type of matter composed of elements and
compounds that has a definite composition
Mixture - correct answer. the physical combination of two or more substances that
does not change the identities of the mixed substances
Elements vs. Compounds - correct answer. Elements are pure substances containing
only 1 type of matter, which cannot be broken down by chemical methods.
Compounds are our substances that contain 2 or more elements, with a definite
composition, the can be broken down to simpler substances only by chemical methods.
Homogeneous mixture - correct answer. the composition of the substance in the
mixture is uniform (ex. air, seawater)
Heterogeneous mixture - correct answer. the components of the mixture are visible
(ex. oil and water)
Physical properties - correct answer. can be observed or measured without affecting
the identity of the substance.
Chemical properties - correct answer. indicate the ability of a substance to change to
a new substance
Chemical change - correct answer. a change during which the original substance is
converted into a new substance that has a different composition and new chemical and
physical properties.
