An inorganic chemist might be found working on:

a method to speed up the production of a metal from its ore

Chemistry is the study of...

matter, its composition, structure, and the changes they undergo

Which of the following is NOT a true statement?

pure substances have only 1 type of atom

Which of the following is a chemical change of matter?

baking soda and vinegar reacting

two or more elements chemically combined

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Unit 1

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Questions 22

Answers

1
When iron melts into molten iron:
a chemical change occurs
a change of state occurs
none of the options
mass is not conserved
2
An inorganic chemist might be found working on:
determining how much NaCl will dissolve in a liter of water
identifying the genes that control insulin production
a study to determine the amt. of heat released when a fuel burns
a method to speed up the production of a metal from its ore
3
Chemistry is the study of...
the physical features of Earth
living things and their life processes
matter, its composition, structure, and the changes they undergo
atoms
4
The branch of chemistry in which the composition of materials are identified is known as...
biochemistry
organic chemistry
analytical chemistry
physical chemistry
5
Elements are arranged in the periodic table according to their__.
atomic mass
number of neutrons
number of electrons
number of protons
6
Which of the following is NOT a property of a gas?
definite shape
easily compressible
indefinite shape
indefinite volume
7
A gaseous substance that is generally a solid or liquid at room temperature is referred to as a(n) ___.
base
vapor
acid
solution
8
Element symbols are based on:
first letter of element name
places
people
all of the options
9
Which of the following are pure substances?
mixtures and compounds
atoms and homogeneous mixtures
nitrogen and carbon dioxide
carbon and brass
10
Which of the following is NOT a true statement?
2 or more atoms bonded make up a molecule
pure substances have only 1 type of atom
2 types of atoms are required to make a compound
mixtures can involve multiple elements, compounds, or both
11
Which group of elements is generally unreactive?
non-metals
metals
noble gases
metalloids
12
Filtration is a method of mixture separation based upon:
melting point
particle size
boiling point
solubility
13
A ___ is an insoluble solid produced in a chemical reaction.
participant
precipitate
acid
vapor
14
Which of the following is a nonmetal?
indium
nickel
phosphorus
mercury
15
Which of the following is a chemical change of matter?
Ice melting
liquid silica solidifying into glass
baking soda and vinegar reacting
water boiling
16
Which is a homogeneous mixture?
Cu wire
Chex Mix
air
CO2
17
Which of the following is an example of an extensive physical property?
hardness
melting point
boiling point
volume
18
Homogeneous mixtures...
are known as solutions
always contain liquids
have a variable composition
consist of 2 or more phases
19
Which of the following describes a metal?
low luster
conducts heat and electricity
can't be hammered into sheets
gas or brittle solid
20
Which of the following substances listed could be considered organic?
H2O
C25H52
In
NH3
21
Which is a compound?
salt
air
chlorine
Chex mix
22
A compound is...
a single element
two or more elements chemically combined
two or more atoms chemically combined
made of inseperable atoms

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