Chemistry Review: Question Preview (ID: 9339)

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A beaker with 100 mL of water is placed on a hot plate and heated. The water boils at 100C. At what temp would 90 mL of water boil?
a) 100C
b) 10C
c) 30C
d) 20C

Which of the following substances will heat up the fastest?
a) Lead - 128 degrees C
b) Iron - 448 degrees C
c) Glass - 837 degrees C
d) Ice - 2,090 degrees C

Chemical X has a mass of 5g, and chemical Y has a mass of 10g. If a chemical reaction takes place, what most likely will be the mass of the product(s)?
a) 5g
b) 10g
c) 15g
d) 50g

Aluminum can be made into aluminum foil becase it is
a) hard
b) malleable
c) ductile
d) square

Silicon is best used for
a) a container to keep coffee hot in
b) as a material to make airplane bodies
c) jewelry and coin making
d) as a semiconductor

Which is an example of a physical change?
a) boiling
b) burning
c) rotting
d) rusting

Which element is a poor conductor of heat?
a) K
b) Fe
c) F
d) Ag

Which is a naturally occurring chemical?
a) aspirin
b) nylon
c) plastic
d) salt

Which pure substance is composed of more than one element?
a) carbon
b) gold
c) water
d) sodium

After a chemical reaction occurs in an open test tube, the mass of the products is less than the mass of the reactants. Why?
a) a gas was produced
b) a solid was produced
c) the salinity of the reactants was high
d) the temperature of the reactants was low

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