Chemistry Term 1 Missed Test Questions
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49 Terms
TRUE OR FALSE: Hot glass looks the same as cold glass
true!
______ is defined as getting consistent, repeatable data
Precision
choose two descriptions for chocolate milk
has color
opaque
Body temperature is ___c and ____k
37, 310
9 + 0.5129
10
*round up
Round 254,931 to 3 sigfigs
255,000
MgCO3
Magnesium Carbonate
PBr4
phosphorus Tetrabromide
CoF3
Cobalt (II) fluoride
K2CrO4
Potassium Chromate
PbS
Lead (II) Sulfide
Copper (II) Nitrate
Cu(NO3)2
Barium hydroxide
Ba(OH)2
Classify Methane as a Compound, Mixture, or Element
compound
Classify Tap water as a Compound, Mixture, or Element
Homogenous Mixture
Classify Iron rusting as a chemical or physical change
Chemical change
Classify water being heated and turning into steam as a chemical or physical change
physical change
Classify sodium hydroxide dissolving in water as a chemical or physical change
physical change
classify food digesting in the stomach as a chemical or physical change
chemical change
Classify methane burns as a chemical or physical change
Chemical change
Classify dry ice sublimes as a chemical or physical change
physical change
What is this showing
a compound
What are these showing
Mixtures
Gas moving around across a space is an example of what
diffusion
Gas particles escaping through tiny holes in a container is an example of what
effusion
According to Kinetic-Molecular theory, the ___ of a gas is proportional to the average kinetic energy of the particle
temperature
Which substance behaves most like an ideal gas?
He (Helium)
Gases behave more ideal at high ___ and low ___
temperature, pressure
A ballon taken outside in the winter experiences a rapid decrease in volume of the gas, due to ___
effusion
TRUE OR FALSE: The volume of the particle itself can be ignored relative to the total volume of the gas
true
TRUE OR FALSE: There are attractive and repulsive forces among gas particles
False
TRUE OR FALSE: the collisions among gas particles are perfectly elastic
true
is this a true statement about compounds: their composition can be represented by a chemical formula
yes
Is this a polyatomic ion: OH-
yes
TRUE OR FALSE: prefixes are used in ionic compound names for metals that can have more than one charge
false
Is this a ionic formula: NaSO4
no