Card Set Information
Chem 101 Final
Exams 2,3,4, and 5
Which of the following elements has an atomic number of 4?
Which of the following elements has only 12 protons?
What is the atomic symbol for silver?
Nonmetals are located where on the periodic table?
A) right side
Group 1A elements are also called:
B) alkali metals.
Group 7A elements are also called:
Mg is a member of which family?
D) alkaline earth metals
Xe is a member of which family?
D) noble gases
Ions are formed when atoms
A) gain or lose electrons.
When an atom gains an electron, the resulting particle is called
A) an anion
What is the charge on the barium ion?
How many protons and electrons are present in O
C) 8 protons and 10 electrons
How many electrons would be in a -2 charged anion of sulfur?
B) atoms of the same element that have different number of neutrons.
An atom of a carbon-14 isotope would contain
B) 6 protons, 8 neutrons and 6 electrons
An atom that has the same number of neutrons as 138/56 Ba is:
D) 136/54 Xe
When elements combine to form compounds,
A) their properties change completely.
How many carbon atoms are in the formula
Which formula shows the proper use of parentheses?
How many of each type of atom are there in the formula (NH
D) N = 2, H = 9, P = 1, O = 4
Carbon is considered which of the following?
D) atomic element
Fouorine is considered which of the following?
D) molecular element
What is the formula for an ionic compound made of magnesium and sulfur?
The ionic compound that forms between potassium and oxygen is
What is the name of Ca(NO
C) calcium nitrate
Which formula shown is incorrect for the name given?
C) lithium sulfate: LiSO
The charge of a vanadium ion in the compound V
What is the name of the molecular compound SO
B) sulfur trioxide
What is correct name of the compound whose formula is BF
C) boron trifluoride
What is the formula mass for potassium nitrate?
C) 101.10 amu
What is the correct value for Avogadro's Number?
C) 6.022 x 10
How many atoms are in 5.8 moles of He?
D) 3.49 x 10
How many atoms are in 1.50 moles of fluorine gas?
C) 1.81 x 10
One mole of boron has a mass of ______g.
One mole of oxygen gas has a mass of _____g.
What is the mass in grams of 5.40 moles of lithium?
How many moles of iron are contained in 1.75 kg of iron?
How many hydrogen atoms are in 35.0 grams of hydrogen gas?
D) 1.05 x 10
What is the mass of 1.56 x 10
atoms of magnesium in grams?
The mass of one mole of carbon dioxide is _______g.
What is the mass in grams of 1 mole of P
A) 141.96 g
Which of the following has the lowest number of atoms?
The molecular weight of Ca
If 3.011 x 10
molecule have a mass of 20.04 grams, what is the molar mass of this substance?
C) 10.02 g/mol
One mole of amonium nitrate contains:
D) 2 moles of nitrogen.
What is the mass percent of chloride in hydrochloric acid?
The empirical formula of a compound:
C) indicates the simplest ratio of atoms in the compound.
Which of the following is already in its empirical forrmula?
The chemical formula CH
O can be classified as:
B) empirical, possibly molecular.
What would the empirical formula be for the molecular compuond C
E) none of the above
A reaction which forms a gaseous product is an example of a _________.
D) gas evolution reaction
A reaction which forms a solid product is an example of a ________.
D) precipitation reaction
When the equation, __N
is balanced, the coefficient of hydrogen is:
What are the coeffecients for the following reaction when it is properly balanced?
__HCl + __Mg ----> __MgCl
C) 2, 1, 1, 1
What are the coefficients for the following reacation when it is properly balanced?
__nitrogen monoxide + __carbon monoxide --> __nitrogen + __carbon dioxide
A) 2, 2, 1, 2
An aqueous solution is:
B) water with another compound dissolved in it.
Which of the following compounds is INSOLUBLE?
B) magnesium phosphate
Which of the following compounds is SOLUBLE?
C) aluminum sulfate
The compoud sodium sulfate is soluble in water. When this compound dissolves in water, which ion isted below would be present in the solution?
In writing the chemical equation for a precipitation reaction, what abbreviation of the physical state must appear with one of the products?
Which compound would not form ions in the complete ionic equation?
What is the correct complete ionic equation?
What is the correct net ionic equation?
What is the net ionic equation for the reaction of hydrochloric acid with potassium hydroxide?
D) H+ + OH- ----> H
What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution?
B) gas evolution
What type of reaction occurs when potassium metal reacts with fluorine gas?
Methane gas (CH
), on complete combustion in air, produces:
A) 1 and 3 only
What type of reaction is the generic equation
A + B ---> AB
A) synthesis/ combination
What type of reaction is the generic equation
AB + CD ---> AD + CB
How many moles of water are made from complete reaction of 1.4 moles of hydrogen gas?
How many grams of water are made from the reaction of 4.0 grams of hydrogen gas?
When 4.50 mol of H
O are formed, the amount of NO formed is
C) 3.00 mol.
The theoretical yield of a reaction is 75.0 grams of product and the actual yield is 42.0g. What is the percent yield?
How many moles of water are neededd to react with 2.2 miles of Li
If the theoretical yield of the reaction below corresponds to 99.2 g and the actual yield was 60.9 g, calculate the percent yield.
Starting with 156g of Li2O and 33.3 g H2O, decide which reactant is present in limiting quantities.
The balanced equation involves the corresponding coefficients _________.
The theoretical number of carbon dioxide moles produced from 3 moles C2H6O is _______.
The theoretical number of moles of water produced from 2 moles of C2H6O is _______.
What is the theoretical mass of carbon dioxide produced from one mole of C2H6O?
The distance between adjacent wave crests is called
The number of cycles of a wave that passes a stationary point in one second is called its
Which color of the visible spectrum has the longest wavelength (750 nm) ?
How are wavelength and frequency of light related?
A) Wavelength increases as the frequency decreases.
Which form of electromagnetic radiation has the shortest wavelength?
A) Gamma Rays
When sunglight is passed through a prism, what is observed?
C) continuous spectrum
The principal quantum number (n):
C) specifies the principal shell of the orbital
How many subshells are there in the n = 4 principal shell?
The subshell leter:
B) specifies the 3-D shape of the orbital.
The n = ____ principal shell is the lowest that may contain a d-subshell.
Which subshell letter corresponds to a 4-leaf clover orbital pattern?
The "d" subshell can hold a maximum of ___ electrons.
How many electrons can exist in an orbital?
Which element is represented by the electron configuration 1s2 2s2 2p2?
What is the electron configuration for Kr?
How many core electrons are in a chlorine atom?
Which Lewis structure below correctly represents KCl?
B) K+ [:Cl:]-
Lewis theory predicts that the formula of a compound formed between bromine and aluminum is:
When a nonmetal bonds with a nonmetal
D) all of the above are true
What is the correct Lewis structure for water?
What is the correct Lewis structure for Br
C) :Br - Br:
The Lewis structure for carbon monoxide is :C three O:
This structure shows
B) 2 lone pains and 3 bonding pairs.
Which sequence below represents the proper order of increasing bond strengtrh?
B) single < double < triple
The correct Lewis structure for BF3 would have exactly:
C) no double bonds
What is the electron geometry if you have 4 electron groups around the center atom?
What is the molecular geometry of PH3?
A) trigonal pyramidal
Which substance listed below is a polar molecule?
Which molecule listed below is a nonpolar molecule?
All of the compounds
Which compound below will dissolve in water?