Chemistry Final Exam
C3H8 + 5O2 = 3C02 +4H20 At STP, how many liters of O2 are needed to completely burn 5.0 liters of C3H8?
25
Which solution contains the greatest number of moles of solute?
2L of 2M
What is the total number of orbitals containing only one electron in an atom of nitrogen in the ground state?
3
A sample of H2(g) at STP contains 9.03 x 10^23 molecules. The volume of the sample is...
33.6L
Atom X is in Group 11A and atom Y is in Croup V11A. A compound formed between these two elements would have the formula...
XY2
Which of the following electron configurations represents the least active metal?
[Ne]3s2
Element A and Element B chemically combine to form substance C. Substance C must be...
a compound
Which type of bond is found in a molecule of methane?
a covalent bond
An orbital is defined as a region of the most probable location of
a electron
The formula H202 is an example of...
a molecular form
Which material is a mixture?
air
Which particle has the same electron configuration as a potassium ion?
argon atom
In the modern Periodic Table, the elements are arranged in order of increasing...
atomic number
If an equation is balanced properly, both sides of the equation must have the same number of
atoms
Electronegativity is a measure of an atom's ability to...
attract the electrons in the bond between the atom and another atom
Which temperature change would cause a sample of an ideal gas to double in volume while the pressure is held constant?
from 200K to 400K
The pH of a 0.1M CH3COOH solution is
greater than 1 but less than 7
When sugar is dissolved in water, the resulting solution is classified as a...
homogeneous mixture
An example of a heterogeneous mixture is
soil
2N2O5(g) Which set of products completes and balances the incomplete equation?
4NO2(g) + 02(g)
What is the total number of carbon atoms contained in 22.4 liters of CO gas at STP?
6.02 x 10 ^23
The diagram given shows a eudiometer tube in a water bath. The water levels inside and outside the tube are equal. If the atmospheric pressure is 750 torr, what is the pressure inside the tube?
750 torr
Which statement explains why sulfur is classified as a Group 16 element?
A sulfur atom has 6 valence electrons
Which is the formula of a binary compound?
Al2S3
Which is an example of a compound?
Ammonia
Which of the following elements has the greatest ability to attract electrons?
Be
What is the molecular formula of a compound that has a molecular mass of 42 and an empirical formula of CH2?
C3H6
The gram molecular mass of CO2 is the same as the gram molecular mass of...
C3H8
Which compound has the least ionic character?
CCl4
Which substance represents a compound?
CO(g)
Which ion has the electron configuration of a noble gas?
Ca2+
Which particle has the largest radius?
Cl
Which element in Period 3 has the greatest tendency to gain electrons?
Cl (Chlorine)
Which atom has the strongest attraction for electrons?
F (Fluorine)
A 2.00 gram sample of helium at STP will occupy...
11.2L
Which quantity of N2 gas has a volume of 11.2L at STP?
14 grams
What is the electron configuration for Be2+ ions?
1s2
Chlorine combines with element M to form a compound with the formula MCl2. Which group in the Periodic Table contains element M?
2 (IIA)
Which of the following elements has the highest electronegativity?
H
Which of the following bonds exhibits the greatest ionic character?
H-F
Which formula represents a hydronium ion?
H3O+
Which formula represents a mixture?
HCl(aq)
Which pair of elements form an ionic bond with each other?
KCl
Which compound contains ionic bonds?
NaBr (s)
Which of the following represents a mixture?
NaCl(aq)
Which of these elements has an atom with the most stable outer electron configuration?
Ne
Which element at STP is a poor conductor of electricity and has a relatively high electronegativity?
S
Which species does not have a noble gas electro configuration?
S
At constant temperature, which line best shows the relationship between the volume of an ideal gas and its pressure?
B
Which halogen is a solid at STP?
Iodine
More than two-thirds of the elements are classified as
metals
Which unit can be used to express solution concentration?
mol/L
Molarity is defined as the...
moles of solute per liter of solution
Which gas is monatomic at STP?
neon
The molarity (M) of a solution is equal to the...
number of moles of solute/liter of solution
Which of the following elements has the strongest attraction for electrons?
oxygen
Which polyatomic ion has a charge of 3-?
phosphate ion
The volume of a 1.00-mole sample of an ideal gas will decrease when the
pressure increases and the temperature decreases