Periodic Table
What are valence electrons?
Electrons found in an atom's outer principle energy level
What are some of the Gas Laws?
Boyle's: (P1V1=P2V2), Charles': (V1T1=V2T2), Gay-Lussac's: (P1T1=P2T2), Avogadro's: (V1/n1=V2/n2), Ideal Gas: (PV=nRT)
What are moles (mol)?
The unit used to measure the amount of a substance
What does KMT stand for?
Kinetic Molecular Theory
What is meant by the term chemical formula?
A chemical formula tells us the number of atoms of each element in a compound
Sr
Strontium
Based on the Gas Laws, what happens to the volume of gas if its temperature is increased?
Increases
What is the conversion between moles and a mass?
# mol x mass (g)/1 mol = mass (g)
mass (g) x 1 mol/mass(g) = # of moles
What is Kinetic Molecular Theory?
Explains the states of matter, and is based on the idea that matter is composed of tiny particles that are always in motion
Define formula unit mass
The formula unit mass is the same as the molecular mass, which is equal to the sum of the masses of the atoms in the formula unit
Define electronegativity
Relative ability of an atom to attract electrons in a chemical bond
STP is defined as _______ atm and 0°C, or______ K
How many particles is in 1 mol?
6.022 x 1023
True or False: Gas particles are in constant, random, and inelastic motion
False, gases are elastic
How many grams of oxygen are in one mole of calcium carbonate, CaCO3?
48 g/mol
What is the electron configuration of Sodium?
1s22s22p63s1
A balloon is filled with 35.0 L of helium in the morning when the temperature is 20.00 C. By noon the temperature has risen to 45.00 C. What is the new volume of the balloon?
What is the molar mass of K2CrO4?
194.2 g/mol
What is pressure?
The force exerted by gas molecules on the walls of their container
What would a compound with molecular formula Fe2(SO4)3 be called?
iron(III) sulfate
What trend in ionization energy occurs down a group on the periodic table? What causes this trend?
Decreases as you move down a group due to increase in atomic radius
A 35 L tank of oxygen is at 315 K with an internal pressure of 190 atmospheres. How many moles of gas does the tank contain?
260 moles of gas
How many atoms of gold are in a gold coin with a mass of 31.1 g Au?
9.51 x 1023 atoms Au
A real gas most closely approaches the behavior of an ideal gas under conditions of what?
Low pressure and high temperature
Chemical A contains different elements with 7.65% of nitrogen, 7.15% of hydrogen, 26.20% of oxygen and 59% of carbon. Find the molecular formula of the compound A.
C9H13NO3