Chemistry 111 Test 1 Exam 95 Questions with Verified
Answers
Dalton's Atomic Theory Of Matter Says - CORRECT ANSWER 1. The Atom is the
smallest particle characteristic of a specific element
2. The Atoms of different elements have different masses and are indivisible
3. Atoms retain their identities through out all reactions
4. Atoms combine in integer ratios to form compounds
Find the problem with the theory: The Atom is the smallest particle characteristic
of a specific element - CORRECT ANSWER There are protons, neutrons, and
electrons as well
Find the problem with the theory: Atoms retain their identities throughout all
reactions - CORRECT ANSWER This is not true of nuclear reactions
Find the problem with the theory: the Atoms of different elements have different
masses and are indivisible - CORRECT ANSWER isotopes are elements that have
different masses but the same number if protons and electrons but different
numbers of neutrons
Find the problem with the theory: Atoms combine in integer ratios to form
compounds - CORRECT ANSWER non-molecular or inorganic compounds don't
always follow this rule and some have ratios of non integers
2 like charged particles - CORRECT ANSWER Are mutually repulsive
V(r) is proportional to 1/r
2 opposite charged particles - CORRECT ANSWER Are mutually repulsive
V(r) is proportional to 1/(r*r)
V(r) = - CORRECT ANSWER (q1*q2)/(4pi*Eo*r)
r - CORRECT ANSWER distance between the 2 partickes
, V(r) - CORRECT ANSWER Coulombic Potential energy in joules aka the energy
stored in the system
q1 and q2 - CORRECT ANSWER positive or negative charges
Eo - CORRECT ANSWER a constant which is equal to 8.854*10^-12
Etot - CORRECT ANSWER total energy in the system it is equal to V+KE
KE - CORRECT ANSWER Kinetic Energy and is dependent upon motion
If there are 2 like charged particles q1and. q2 will be _____ thus r will be and V(r)
ill be. ____ - CORRECT ANSWER >0
>0
>0
V - CORRECT ANSWER Potential energy in joules, it is relative to location and
dependent upon r
KE= - CORRECT ANSWER .5mv^2
mass is in kg and velocity is in m/s
3 Phases of Matter - CORRECT ANSWER Solid- fixed shape, fixed volume
Liquid- takes shape of container, fixed volume
Gas- takes shape of container, takes volume of container
Pure Substances - CORRECT ANSWER Same physical and chemical properties
throughout
Cannot be separated
Types:
Element- cannot be separated into simpler substances
Ex: C, Fe, Cl, Cu, Ne, H
Compound- composed of 2 or more elements bonded together in fixed
proportions
-can be broken down into individual elements
Ex: H2O, C6H12O6, CO2, Fe2O3
Answers
Dalton's Atomic Theory Of Matter Says - CORRECT ANSWER 1. The Atom is the
smallest particle characteristic of a specific element
2. The Atoms of different elements have different masses and are indivisible
3. Atoms retain their identities through out all reactions
4. Atoms combine in integer ratios to form compounds
Find the problem with the theory: The Atom is the smallest particle characteristic
of a specific element - CORRECT ANSWER There are protons, neutrons, and
electrons as well
Find the problem with the theory: Atoms retain their identities throughout all
reactions - CORRECT ANSWER This is not true of nuclear reactions
Find the problem with the theory: the Atoms of different elements have different
masses and are indivisible - CORRECT ANSWER isotopes are elements that have
different masses but the same number if protons and electrons but different
numbers of neutrons
Find the problem with the theory: Atoms combine in integer ratios to form
compounds - CORRECT ANSWER non-molecular or inorganic compounds don't
always follow this rule and some have ratios of non integers
2 like charged particles - CORRECT ANSWER Are mutually repulsive
V(r) is proportional to 1/r
2 opposite charged particles - CORRECT ANSWER Are mutually repulsive
V(r) is proportional to 1/(r*r)
V(r) = - CORRECT ANSWER (q1*q2)/(4pi*Eo*r)
r - CORRECT ANSWER distance between the 2 partickes
, V(r) - CORRECT ANSWER Coulombic Potential energy in joules aka the energy
stored in the system
q1 and q2 - CORRECT ANSWER positive or negative charges
Eo - CORRECT ANSWER a constant which is equal to 8.854*10^-12
Etot - CORRECT ANSWER total energy in the system it is equal to V+KE
KE - CORRECT ANSWER Kinetic Energy and is dependent upon motion
If there are 2 like charged particles q1and. q2 will be _____ thus r will be and V(r)
ill be. ____ - CORRECT ANSWER >0
>0
>0
V - CORRECT ANSWER Potential energy in joules, it is relative to location and
dependent upon r
KE= - CORRECT ANSWER .5mv^2
mass is in kg and velocity is in m/s
3 Phases of Matter - CORRECT ANSWER Solid- fixed shape, fixed volume
Liquid- takes shape of container, fixed volume
Gas- takes shape of container, takes volume of container
Pure Substances - CORRECT ANSWER Same physical and chemical properties
throughout
Cannot be separated
Types:
Element- cannot be separated into simpler substances
Ex: C, Fe, Cl, Cu, Ne, H
Compound- composed of 2 or more elements bonded together in fixed
proportions
-can be broken down into individual elements
Ex: H2O, C6H12O6, CO2, Fe2O3
