CI Investigation 9 Question Preview (ID: 46929)
Molecules
Compounds.
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Is water an element or compound?
a) element
b) compound
c)
d)
The chemical formula of magnesium sulfate is MgSO4. How many atoms are in this molecule?
a) 4
b) 5
c) 6
d) 3
The chemical formula for ascorbic acid is C6H8O6. How many elements and atoms is this molecule composed of?
a) 4 elements, 3 atoms
b) 20 elements, 3 atoms
c) 1 element, 3 atoms
d) 3 elements, 20 atoms
The starting substances in a chemical reaction are called
a) reactants
b) products
c)
d)
The ending substances in a chemical reaction are called
a) reactants
b) products
c)
d)
Which of the following represents a chemical reaction?
a) burning
b) melting
c) color change
d) temperature change
A chemical reaction _____ creates a new substance.
a) never
b) sometimes
c) rarely
d) always
Products and reactants are separated with
a) plus signs
b) minus signs
c) yield signs
d) equal signs
A chemical reaction is balanced when
a) each atom present is equal on both the product and reactant side.
b) there are the same number of atoms total on each side.
c) the chemical reaction has taken place.
d) the products are gases.
Which statement represents the the law of conservation of matter?
a) No matter can be destroyed, but it can be created through chemical reactions.
b) Matter is created and destroyed through the processes of chemical reactions.
c) None of these options.
d) In reactions, new substance are formed by rearranging the original atoms. No matter is created or destroyed.
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