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CI Investigation 9
Test Description: Molecules compounds
Instructions: Answer all questions to get your test result.
1) Is water an element or compound?
A
element
B
compound
2) The chemical formula of magnesium sulfate is MgSO4. How many atoms are in this molecule?
A
3
B
5
C
4
D
6
3) The chemical formula for ascorbic acid is C6H8O6. How many elements and atoms is this molecule composed of?
A
20 elements, 3 atoms
B
1 element, 3 atoms
C
4 elements, 3 atoms
D
3 elements, 20 atoms
4) The starting substances in a chemical reaction are called
A
products
B
reactants
5) The ending substances in a chemical reaction are called
A
reactants
B
products
6) Which of the following represents a chemical reaction?
A
burning
B
temperature change
C
color change
D
melting
7) A chemical reaction _____ creates a new substance.
A
always
B
sometimes
C
rarely
D
never
8) Products and reactants are separated with
A
minus signs
B
yield signs
C
equal signs
D
plus signs
9) A chemical reaction is balanced when
A
the chemical reaction has taken place.
B
there are the same number of atoms total on each side.
C
the products are gases.
D
each atom present is equal on both the product and reactant side.
10) 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
In reactions, new substance are formed by rearranging the original atoms. No matter is created or destroyed.
D
None of these options.
*select an answer for all questions
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