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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
compound
B
element
2) The chemical formula of magnesium sulfate is MgSO4. How many atoms are in this molecule?
A
3
B
4
C
5
D
6
3) The chemical formula for ascorbic acid is C6H8O6. How many elements and atoms is this molecule composed of?
A
3 elements, 20 atoms
B
20 elements, 3 atoms
C
4 elements, 3 atoms
D
1 element, 3 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
color change
B
melting
C
burning
D
temperature change
7) A chemical reaction _____ creates a new substance.
A
never
B
sometimes
C
always
D
rarely
8) Products and reactants are separated with
A
yield signs
B
minus signs
C
plus signs
D
equal signs
9) A chemical reaction is balanced when
A
there are the same number of atoms total on each side.
B
the chemical reaction has taken place.
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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