Chemistry Final
The pH of a 0.1 molar solution of HCl would be
1
The coefficients of the correctly balanced equation for the reaction illustrated above are: ____H2O= ___H2 + ___O2
2,2,1
A gas cylinder is filled with 4.00 moles of oxygen gas at 300k. The piston is compressed to yield a pressure of 400.0 KPa What is the volume inside the cylinder (Ideal gas law )
24.9
How many atoms are in this formula: Ni(C2H3O2)4
29
Which of these shows a simple chemical decomposition
2NaCl= 2Na +Cl2
Which of these sets would balance the this equation: __AgNO3 + __AlCl3= __AgCl + __Al(NO3)3
3,1,3,1
What would be the produce of this reaction: 3MgO+ 2Al
3Mg+ Al2O3
What is a Mole
A measurement of the amount of substance present, can be defined by Particles volume or mass
What is a dilute solution
A solution with a small number of dissolved solute particles compared to solvent
A. If you have 2 atoms that are boned together that are different, they are-
A. Polar
H2SO4 is a
Acid
B. If you have a central atom and the atoms around it are different, they are
B- Polar
Which is an Example of a synthesis reaction
C + O2 = CO2
C. If there are lone pairs then it is -
C. Polar
A compound is composed of 85.64 carbon and 14.36% hydrogen. The compound has a formula mass of 42.08 grams what is the molecular formula
C3H6
The empirical formula for ethyne is
CH
Which of these represents the empirical formula and the molecular formula respectively for a given organic compound
CH and C2H2
Ketones have a double bond between
Carbon and Oxygen
Organic chemistry is the study of covalent compounds that contain
Carbons and Hydrogen
What is a Chemical reaction?
Changes the composition of matter and forms new substances
A balanced chemical equation has equal number of atoms of each type on both sides of the equation, that illustrates the principle of
Conservation of mass
the correct structural formula for c2h4 is -
Ethylene
A+B=D+heat, This reaction is
Exothermic reaction
Which is the correct formula for iron (III) sulfate
Fe2(SO4)3
What is Charles' Law and formula ?
For a given amount of gas, the volume is directly proportional to the kelvin temperature of the gas when the pressure is held constant V1/T1 = V2/T2
What is Boyle Law and his formula
For a given amount of gas,pressure and volume are inversely when temperature remains constant. (P1)(V1)=(P2)(V2)
Elements from which two groups in the periodic table would most likely combine with each other to form an ionic compound
Groups 1 and 17
Which of the following equations is balanced?
H2O+ MgO= AlPO4 + Mg(OH)2
What group has 7 valence electrons
Halogens
Very Active Metal Water → Metal Hydroxide?Which of these completes this reaction?
Hydrogen
This type of bond is found in Magnesium chloride is
Ionic
Elements of the same element but different masses are
Isotopes
What is the formula for Lithium nitride
Li3N
What would be the correct formula for Sodium Bromate
NaBrO3
Are heat and temperature the same thing
No
Can electrolytes conduct electricity?
No
Alkynes are
Organic compounds with at lease one triple bond (2C-2=H)
Alkenes are
Organic compounds with at least one double bond between carbons (2C=H)
What is the ideal gas law?
PV=nRT (R=8.31)
In chemical compounds, covalent bonds form when:
Pairs of electrons are shared between two nonmetal atoms
What is the molecular shape of ammonium NH3
Pyramidal
When naming a transition metal that has more than one oxidation number the numeric value of the oxidation number is expressed by a
Roman Numeral
A compound is 50% sulfur and 50% oxygen what is the empirical formula
SO2
What type of reaction is this: ZN + CuSO4 = Cu + ZnSO4
Single Replacement
Water molecules have the greatest kinetic energy in
Steam
To indicate the number of atoms of each element present in a molecular compound, scientists use
Subscripts
What is the correct shape of CH4
Tetrahedral
What is Gay-Lussac's Law and formula?
The Pressure of a gas is Directly proportional to the kelvin temperature when the volume is held constant P1/T1=P2/T2
What does heat measure
The energy absorbed or released by a system
What is Gibbs free energy?
The energy associated with a chemical reaction that can be used to do work ( determines of reaction is spontaneous
What is enthalpy?
The heat content of a system at constant pressure
If temperature increases
The reaction rate becomes quicker because of more collisions of particles
What happens at a triple point on a phase diagram
The three phases of matter exist as one (solid, liquid, gas)
What is the molecular shape of CO3 (2-)
Trigonal planar
What are covalent bonds?
Two nonmetals
The system that shows a decrease in entropy (Disorder) is
Water Freezing
What is Le Chatelier's principle?
When a reaction at equilibrium is changed, it will seek to counteract that change
What is a concentrated solution
a solution with a large number of dissolved solute particles compared to the number of solvent particles
Neutralization is
a special case of double replacement where and acid and a base react to form water and salt
What is the molecular shape of water
bent
The correct name for CCl4 is
carbon tetrachloride
What are intermolecular forces?
forces of attraction between molecules
empirical formula
gives the lowest whole number ratio
A catalyst is a substance used in chemical reaction to?
increase the reaction rate without getting consumed in the process
a catalyst accelerates a reaction because
it lowers the activation energy for the reaction
What is the molecular shape of N2
linear
The correct name for MgI2 is
magnesium iodide
What is entropy?
measure of disorder
What is the formula for molarity
moles of solute/liters of solution
Alcohols are named like alkanes but with
ol endings
Alkanes are
organic compounds with all single bonds between carbons, end in ane (2n+20)
the lewis electron dot system represents electrons in the -
outer energy level
Aldehydes is an organic molecule that has an
oxygen atom
Heated liquid placed in a closed container will vaporize until?
the number of liquid molecules vaporizing equals the number of vapor molecules condensing.
Atoms are neutral, which means
the number of protons is equal to the number of electrons
Combustion is
when a hydrocarbon burns in the presence of oxygen and gives of water and carbon dioxide
