chemistry 1010 Test 1 Review
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chemistry 1010 Test 1 Review
Chemistry1010 heather fimbres metropolitan community college Geringer
For chem 1010 test 1
A physical combination of 2 or more substances that does not have a uniform composition
The first step in the scientific method is
to make an observation
One ml is the same as
1 centimeter cubed
What are some physical properties?
what are some chemical changes?
Reactions with water and oxygen. Combustable.
Organic chemistry is?
the chemistry that involves carbon compounds
Sodium Chloride NaCl is an example of
a pure substance compound
phase change from gas to liquid is
SI stands for
Pure substances are either
compounds or elements
is melting, freezing, and evaporating a chemical change or physical change?
Units of mass are
SI unit of volume
How many significant figures are in 12.000
5 because trailing zeros count if there is a decimal in the problem
Getting the outcome or value that you are supposed to get is the
Freezing point of water in Fahrenheit is...
data that is consistent time after time and is mathematically measurable is
chemicals in living organisms like hormones and enzymes
Evidence of a chemical reaction can be...
permanent color change, release of gas, forming a precipitate, giving off or taking in heat, giving off light, forming water
a physical combination of two or more substances
blue elements on the periodic table are ... at room temp?
what does ductile mean?
stretched into a wire
the difference between a law and a theory is
a law is measurable
how many milli's are in one Kilo?
reproducibility of measurements is the
The scientist that first organized scientific research into a format now called the scientific method is...
Any thing that has mass and occupies space
how many significant figures are in 12000?
2 because the trailing 0s don't count if there is no decimal in the problem
mass is measured with a
what NONmetal is liquid at room temp?
how many milli are in one base?
Formula for finding specific heat is..
heat energy / mass * change in the temp
a homogenous mixture of 2 or more metals.
chemistry is the study of
the composition and property of matter
the symbol for micro is
Units of weight
boiling point of water in Kelvin
heat energy can be measured in
calories, joules, and kilojoules
Early chemists that were involved with mysticism and experimentation were called
Oil water and sand are examples of...
the effect of gravity
round off 120055 to 4 significant figures. .
Freezing point of water in Kelvin
How many sig figs are in 0.000120
3 because leading zeros never count and there is a decimal so the trailing zeros DO count
Methods of physcially seperating mixtures
Distillation, filtration, magnetism, evaporation
Formula for finding the mass if you know the volume and density
if the mass of the reactants if 4 grams hydrogen and 15 grams of oxygen, how much water can be made?
19 grams of water
weight is measured with a
what does malleable mean?
Phase change from a gas to a solid is called
deposition (skips the liquid phase)
What are the properties of metals?
shiny, good conductors, high density, solid at room temp, malleable and ductile.
What metal is liquid at room temp?
What do the black symbold on the periodic table represent?
They are solid at room temp
chemical combination of two or more substances
the fromula for finding the density is
how many micros are in one base
How many sig figs are in 1256
SI unit of mass is
Phase change from solid to a liquid is called
SI unit for temp is
How many base units are in one Kilo?
SI unit for number of some thing is
Any attempt to explain your observation is the
Salt water and air are examples of
the simplest pure substance that cannot be broke down any further is
A physcial combination of a substance that has uniform composition
Round 40915 to 3 sig figs
Phase change from solid to gas is
sublimation ( skips liquid phase)
law of conservation of mass is
matter is neither created or destroyed it just changes from one thing to another
the density of water at 4 degrees celsius is
how many sig figs are in 12001
5 because captive zeros always count
What elements are SEMI metals?
B, Si, As, Te, At, Po and some times Ge
Boiling point of water in celsius is
freezing point of water in celsuis is
the measure of average kenitic energy of a substance is the
the four states of matter are
Gas, Liquid, Solid, and plasma
Is chewing food a chemical or physcial reaction
data that attempts to explain a natural phenomena is a
Is dissolving some thing a physical or chemical reaction
the amount of mass a substance has in a given volume is the
A heat calorie is defined as
the amount of heat energy that it takes to change one gram (ml) of water 1 degree celsius
the formula for finding the specific gravity is
density of the substance/density of water at 4 degrees celsius
Al(C2H3O2)3 has how many total atoms?
red element on the periodic table are
gas at room temp
one calorie = ___ joules
the composition of what some thing is made of is its
The state of matter that has the most kenitic energy is the
gas (excluding plasma)
Formula for changing celsius to fahrenheit
F = (9/5C) +32
Specific heat is
The amount of energy it takes to change one gram of any substance to one degree celsius
Formula for changing fahrenheit to celsius
C = 5/9 (F-32)
The measurement of the average Kinetic energy within a system
Natural law is often expressed as a...
Science can be defined as
the methodical exploration of nature followed by a logical explanation of the observation
the chemistry of substances derived from plants and animals
no instrement of measurement is...
the closeness of a measurement to the true value
Reflects the reproducibility of a measurement
Time is defined in terms
independent of the size of the sample
the ratio of the density of a liquid to the density of water at 4 degrees C
O = 1.000g/cm
The form of energy that is transferred between samples of matter because of a difference in temp
Can be broken down into elements by an ordinary chemical reaction
low melting point
poor conductors of heat and electricity
In the solid state they are dull and are not malleable or ductile
Law of definite composition
Compounds always contain the same elements in a constant proportion by mass
Examples of chemical changes
A rotting banana