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WorksheetsChemistry Final Review 3
Total questions: 20
Worksheet time: 10mins
A 4.0 g sample of iron was heated from 0°C to 20.°C. It absorbed 35.2 J of energy as heat. What is the specific heat of this piece of iron?
2816 J/gxC
2.27 J/gxC
2.27 J/g
0.44 J/gxC
Magnesium hydroxide decomposes to yield magnesium oxide and
hydrogen
oxygen
water
salt
Name the compound Fe(NO3)2.
Iron (II) Nitrate
Iron (II) Nitrite
Iron (III) Nitrate
Iron (III) nitride
These values were recorded as the mass of products when a chemical reaction was carried out three separate times: 8.83 g; 8.84 g; 8.82 g. The mass of products from that reaction is
8.60 g. The values are
accurate, but not precise
precise, but not accurate
both accurate and precise
neither
For the reaction represented by the equation 2H2 + O2 ® 2H2O, how many grams of water are produced from 6.00 mol of hydrogen?
2
6
54
108
The electron configuration of an element is [Kr] 4d6 5s1. To what group does this element belong?
4
5
7
9
An electron for which n = 4 has more ____ than an electron for which n = 2.
spin
particle nature
energy
wave nature
The measurement 0.035550 g rounded off to two significant figures would be
0.03
0.35
0.036
3.5 x 102
Which coefficients correctly balance the formula equation
NH4NO2(s)® N2(g) + H2O(l)?
1 2 2
1 1 2
2 1 1
2 2 2
What is the formula for the compound formed by calcium ions and chloride ions?
CaCl
Ca2Cl
CaCl3
CaCl2
The energy required to remove an electron from an atom is the atom's
electron affinity
electron energy
electronegativity
ionization energy
In the reaction represented by the equation 2Al2O3 ® 4Al + 3O2, what is the mole ratio of aluminum to oxygen?
10:6
3:4
2:3
4:3
According to the kinetic-molecular theory, particles of matter
are in constant motion
have different shapes
have different colors
are always fluid
Which is an example of effusion?
air slowly escaping from a pinhole in a tire
the aroma of a cooling pie spreading across a room
helium dispersing into a room after a balloon pops
oxygen and gasoline fumes mixing in an automobile carburetor
Above the critical temperature, a substance
does not have a vapor pressure
sublimes
cannot exist in the liquid state
is explosive
Which is not an example of a colloid?
paint
smoke
butter
sugar water
Stirring increases the rate of dissolution because it
raises the temperature
lowers the temperature
brings fresh solvent into contact with the solute
decreases the surface area of the solute
The greater the average kinetic energy of the particles in a sample of matter,
the higher the temperature is.
the lower the termperature is.
the more energy is absorbed by the sample in the form of heat.
the less energy is released by the sample in the form of heat.
ΔH is always positive for a
spontaneous reaction
non spontaneous reaction
exothermic reaction
endothermic reaction
What is the half-life of an isotope if 125 g of a 500 g sample of the isotope remain after 3.0 years?
1.5 years
2.5 years
3.5 years
4.5 years
