P.T
Arrange the following in order of increasing size
(Mg, Mg+2, Ca)
Mg+2, Mg, Ca
What is average atomic mass?
mass x abundance + mass x abundance
Abundance has to be in decimal form
What do the peaks represent?
Peaks represent subshells where higher binding energy (left side) means closer to the nucleus and stronger attraction
When 4g of CH4 undergoes combustion with excess O, what mass of the CO2 is produced?
11grams
What is percent yield?
actual/ theoretical x 100
Arrange in order of increasing electronegativity
(F, K, Al, P)
K, Al, P, F
isotope 2 l mass 11 amu, abundance 80%
Average atomic mass
10.8 amu
Would Na or Mg have a higher binding energy in its outermost electrons?
Mg- one more proton in its nucleus = higher effective nuclear charge
3 Ag(s) + 4 HNO3(aq) 3 AgNO3(aq) + 2 H2O(l) + NO(g)
How many moles of silver are needed to react with 40 moles of nitric acid?
30 mol Ag
What is limiting reagent
The reagent that is totally consumed, determining the maximum product formed
Which of the following alkali metals has the largest atomic radius
(Na, K, Rb, Cs)
Cs
what is a proton?
(+) nucleus, 1 amu, atomic #
What is PES?
graphs visualize atomic structure by plotting binding energy (x-axis, high to low) vs relative electron #(y-axis)
3 Mn3O4(s) + 8 Al(s) 4 Al2O3(s) + 9 Mn(s)
How many manganese atoms are liberated if 54.8 moles of Mn3O4 react with excess aluminum
9.9 x 1025 atoms Mn
what is the excess reagent
the substance in a chemical reaction that remains, or is not completely consumed, after the reaction reaches completion
Which of the following atoms has the smallest atomic radius?
( C, F, Be, N)
F
neutral, nucleus, 1 amu, mass atomic #
What is meant by the "mole ratio" in a balanced chemical reaction?
The mole ratio is the ratio of the stoic coefficients of reactant and products in balanced chemical equations.
3 Ag(s) + 4 HNO3(aq) 3 AgNO3(aq) + 2 H2O(l) + NO(g)
From the amount of nitric acid given in Part A, how many moles of nitrogen monoxide will be made?
10 mol NO
What is Avogadros number
6.022 x 10^23
Which element has the lowest first ionization energy
(K, Cs, H, Na)
Cs
What is atomic mass
protons + neutrons
What does the peak height represent?
Corresponds to the # of electrons, providing direct evidence for electron configurations
what are the four primary types of stoichiometry problems
mole-to-mole, mole-to-mass (or mass-to-mole), mass-to-mass, and volume-to-volume (or mass-volume)
what is ROYGBIV
ROYGBIV is a mnemonic acronym for the sequence of hues in the visible light spectrum (rainbow): Red, Orange, Yellow, Green, Blue, Indigo, and Violet. It represents the order of colors based on wavelength, with red having the longest wavelength and violet the shortest