The Importance of Water Answers
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There are several ways to model a compound. One type of model is shown.
A
CHOB
C4H11O2C
C6H12O2D
C6H9O2
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What does the chemical formula CaCl2 show about the compound it represents?
A
It is made up of one element.B
It is made up of two elements.C
It is made up of three elements.D
It is made up of four elements.3
Which statement describes how chemical formulas, such as H2O, represent compounds?
A
They show the types of molecules that make up an atom.B
They show the elements that make up a compound.C
They show the three-dimensional shape of a molecule.D
They show the types of bonds that exist between elements.4
How many atoms of each element are in 4Na3PO4?
A
3 sodium, 1 phosphorus, 4 oxygenB
4 sodium, 4 phosphorus, 4 oxygenC
12 sodium, 1 phosphorus, 4 oxygenD
12 sodium, 4 phosphorus, 16 oxygen5
What does the chemical formula CaCl2 show about the compound it represents?
A
It is made up of one element.B
It is made up of two elements.C
It is made up of three elements.D
It is made up of four elements.6
Carl makes the table below to determine the number of atoms of each element in the chemical formula 4Ca(ClO3)2.
A
He did not multiply the calcium atoms by the subscript 2.B
He did not add the coefficient 4 to the chlorine and oxygen atoms.C
He did not add the subscript 2 to the calcium atoms.D
He did not multiply the chlorine and oxygen atoms by the coefficient 4.7
Which statement correctly describes why a compound is a pure substance?
A
A compound is not a pure substance because each of its molecules is made up of the atoms of two or more different elements.B
A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means.C
A compound is not a pure substance because it is not an element, and only elements are pure substances.D
A compound is a pure substance because it consists of two different elements, which are pure substances.9
Two models of the same compound are shown.
A
Model B shows the types of elements in the compound, but Model A does not.B
Model B shows the three-dimensional shape of the molecule, but Model A does not.C
Model B shows how the atoms in the molecule are connected, but Model A does not.D
Model B shows the number of atoms of each element in the molecule, but Model A does not.10
Two models of the same compound are shown.
A
Model A shows the types of elements in the compound, but Model B does not.B
Model A shows the total number of atoms in the molecule, but Model B does not.C
Model A shows the three-dimensional shape of the molecule, but Model B does not.D
Model A shows the number of atoms of each element in the molecule, but Model B does not.Did you find these answers helpful?
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