Physical Properties/Matter
Compared to the physical and chemical properties of the compound H2O, the compound H2O2 has
a.) different physical and chemical properties
b.) different physical and same chemical properties
c.) same physical and different chemical properties
d.) the same physical and chemical properties
a.) different physical and chemical properties
What is the net charge of an ion that consists of 14 electrons, 11 protons, and 13 neutrons?
-3
Which element is least likely to undergo a chemical reaction?
a.) xeon
b.) potassium
c.) carbon
d.) nitrogen
a.) xeon
Balance the follow equation
Sb2S3(s) + O2(g)--> Sb2O3(s) + SO2(g)
2,9,2,6
which nuclear particle has the greatest mass?
alpha particle
List one noble gas
Ne, Ar, Kr, Xe, Rn, Uuo, He
As an electron in an atom moves from the ground state to the excited state, the electron
a.) loses energy as it moves to a higher energy level
b.) gains energy as it moves to a lower energy level
c.) gains energy as it moves to a higher energy level
d.) loses energy as it moves to a lower energy level
c.) gains energy as it moves to a higher energy level.
Draw the Lewis Dot Diagram for N2
See smart board for answer
What is the number of moles of C that must completely react to produce 3 moles of C2H6?
2C +3H2--> C2H6
6
What is a transmutation?
one nucleus is converted into a different nucleus
Explain, in term of particle arrangement, why NaCl(aq) is a homogeneous mixture.
even distribution of particles
Provide an electron configuration that represents an atom of aluminum in an excited state.
answers may vary
Provide an example of a POLAR molecule and EXPLAIN why it is polar.
Determine the mass of 5 moles of methanol with a molar mass of 32g/mol.
160g
Identify the decay mode of Ne-19
positron decay
What is represented by the chemical formula KCl(s)?
a.) solution
b.) substance
c.) homogeneous mixture
d.) heterogeneous mixture
b.) substance
Explain, in terms of protons and neutrons, why C-12 and C-14 are different isotopes of carbon.
Same number of protons BUT different number of neutrons.
The bonds in NH3 have a higher electronegativity difference than the bonds in CH4.
Given the reaction:
What is the approximate deltaH for the formation of 1 mole of H2O(l)?
2H2(g) + O2(g)--> 2H2O(l) + 571.6kJ
-285.8kJ
Complete the nuclear equation for the decay of Cs-137
137Cs--> 0e + _________
55. -1
137Ba
56
Which substance CAN be broken down by a chemical change?
a.) magnesium
b.) ethane
c.) gallium
d.) strontium
b.) ethane
Show a correct numerical setup for calculating the atomic mass of boron using the information below
B-10 atomic mass- 10.01 percent abundance- 19.9%
B-11 atomic mass- 11.01 percent abundance- 80.1%
(10.01) * (0.199) + (11.01) * (0.801)
What is the name of the compound whose formula is FeCl3?
a.) Iron (I) Chloride
b.) Iron (II) Chloride
c.) Iron (III) Chloride
d.) Iron (IV) Chloride
Iron(III) Chloride
A rigid cylinder with a movable piston contains 50L of a gas at 30.0C with a pressure of 1atm. What is the volume of the gas in the cylinder at STP?
45L
Determine the total mass of an original 28mg sample of Po-210 (half-life of 138 days) that remains unchanged after 414 days.
3.5mg