Chemical Formulas

Chemical Formulas

Multiple Choice

How many oxygen atoms are in this chemical formula?

• 7 oxygen atoms
• 4 oxygen atoms
• 3 oxygen atoms
• 1 oxygen atom

Multiple Choice

How many different ELEMENTS are in H₂O?

• 1

• 2

• 3

• 4

Multiple Choice

How many atoms of carbon (C) are in  C₆H₁₂O₆?

• 3
• 6
• 12
• 24

Multiple Choice

How many atoms of carbon are in the formula CH₃CH₂CH₂OH?

• 3

• 1

• 7

• 4

Multiple Choice

Which of the following formulas would be used to describe molecule 4?

• C₃HO

• C₄HO

• CH₄O

• CH₃O

Multiple Choice

Which elements are in the formula shown above?

• Cobalt only

• Carbon and Oxygen

• Copper only

• Carbon and Osmium

Multiple Choice

Alanine is an amino acid with formula C₃H₇NO_2. How many atoms in all are in each molecule of alanine?

• 3

• 7

• 12

• 13

Multiple Choice

The blue atoms are called 

• metals
• nonmetals
• metalloids
• noble gases

Multiple Choice

What carries no charge 

• Neutrons
• Electrons
• Protons

Multiple Choice

Which of the following is a positively charged subatomic particle found in the nucleus of an atom?

• Electron
• Proton
• Neutron
• Quark

Multiple Choice

How many atoms are there TOTAL in:
H₂SO₄

• 6
• 5
• 7
• 3

Multiple Choice

The blue numbers in the image below represent ________

• I don't know, and don't want to try
• coefficients
• subscripts
• none of the answers are correct

Multiple Choice

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄
• HSO₄
• H₄S₃O
• H₂O

Multiple Choice

Which of the following is a compound?

• Co
• O₂
• C
• CO₂

Multiple Choice

Element or compound?
H₂O

• element
• compound

Multiple Choice

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3
• 6
• 12
• 24

Multiple Choice

How many carbon atoms (C) are in a CO₂ molecule?

• 1
• 2
• 3
• 0

Multiple Choice

Which of the following is NOT an element?

• H₂O
• H₂
• O₂
• Au

Multiple Choice

Element or compound?
O₂

• Element
• Compound

Multiple Choice

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

• The shape of the coal changes
• Oxygen is present
• A new substance is produced
• Coal is made up of more than one element

Multiple Choice

For an investigation a student poured a blue solution of CuSO₄ into a beaker. The student placed a shiny, silver-colored strip of zinc metal in the solution and observed the changes.
The student inferred that a chemical reaction occurred. What evidence supports this inference?

• A dark solid formed on the zinc metal.
• The zinc metal remained silver-colored and shiny
• The CuSO₄ solution turned blue when the zinc metal was added.
• None of these

Multiple Choice

All of the following are chemical changes except

• iron rusting
• water evaporating
• wood burning
• food rotting

Multiple Choice

A substance that undergoes a(n) _____ change becomes a new kind of substance.

• large
• physical
• chemical
• state of matter

Multiple Choice

Which of these is an element?

• H₂Cr
• Cr₃
• OH
• PNi

Multiple Choice

How many molecules are in 10MgCl₂?

• 10
• 2
• 30
• 13

Multiple Choice

How many elements are present in this compound?
Mg₂As₃COHNi₂

• 2
• 4
• 6
• 10

Multiple Choice

If there is no subscript, there is ______ atom(s) of that element.

• 0
• 2
• only 1
• 1 million

Multiple Choice

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

Multiple Choice

Which elements are in the formula shown above?

• Tin and Chlorine

• Tin, Carbon and Lithium

• Sulfur, Nitrogen and Chlorine

• Sulfur, Nitrogen, Carbon and Lithium