Chemistry Test 1
the average distance from Earth to the Sun is 150 megameters. what is the distance in meters?
1.5x10^8m
which of the following correctly expresses 52,030.2m in scientific notation?
5.20302x10^4m
the mass of a sample is 550 milligrams. which of the following expresses that mass in kilograms?
5.5x10^-4kg
calculate the mass percent of oxygen in kaolinite
55.81 mass%
what is the formula of chlorine dioxide?
ClO2
what is the formula for lithium nitrite?
LiNO2
what is the formula for magnesium sulfide?
MgS
a large pizza has a diameter of 15 inches. Express this diameter in centimeters
38cm
calculate the molecular mass for ammonium sulfate (NH4)2SO4
132.13amu
given that 1 inch = 2.54cm, 1cm^3 is equal to
.0610 in^3
The speed needed to escape the pull of Earth's gravity is 11.3 km/s. What is this speed in mi/h?
25,300 mi/hr
Isotope Bromine -81 select the combination which lists the correct atomic number, neutron number, and mass number, respectively
35, 46, 81
which of the following correctly expresses .000007913g in scientific notation?
7.913x10^-6g
what is the formula for barium sulfate?
BaSO4
what is the chemical formula of diiodine pentaoxide?
I2O5
After an atom has lost an electron it becomes a/an ______ and has a _______ charge.
cation, positive
what is the name of CoCl2
cobalt (II) chloride
S Ge Hg H I Si
nonmetal mettaloid metal nonmetal nonmetal metalloid
which one of the following combinations of names and formulas of ions is incorrect?
oxide
what is the name of PCL3
phosphorus trichloride
what is the name of P4S10
tetraphosphorus decasulfide
what is the name of P4Se3
tetraphosphorus triselenide
the chmeical symbol of potassium is
K
which of the following gives the formula and the bonding for sodium oxide?
Na2O, ionic compound
what is the formula for lead (II) oxide?
PbO
Atoms X, Y, Z, and R have the following nuclear compositions: Which two are isotopes?
X & Z
what is the formula of tetrasulfur dinitride?
S4N2
what is the chemical symbol for the group 6A(16) element that lies in Period 4?
Se
what is the name of (NH4)2S
ammonium sulfide
when an atom is represented by the symbol, the value of A is the
atomic mass of the element
what is the name of BBR3
boron tribromide
what is the name of the acid formed when HBr gas is dissolved in water?
hydrobromic acid
which of the following is a metal?
thallium, TI, Z=81
