Decoding Chemical Formulas

What is the chemical formula for water?

• NO2

• CO2

• H2O

• SO4

Tags

NGSS.MS-PS1-1

Which element is represented by 'H' in chemical formulas?

• Holmium

• Hafnium

• Hydrogen

• Helium

How many oxygen atoms are present in sulfuric acid (H2SO4)?

• One

• Two

• Four

• Three

Tags

NGSS.MS-PS1-1

What does the subscript '4' in the formula H2SO4 represent?

• Four sulfur atoms

• Four molecules

• Four oxygen atoms

• Four hydrogen atoms

Tags

NGSS.MS-PS1-1

What does the subscript outside the parentheses indicate in a chemical formula?

• Number of groups

• Number of molecules

• Number of electrons

• Number of bonds

What role do parentheses play in chemical formulas like C7H5(NO2)3?

• None of the above

• Group certain elements together

• Indicate charge

• Separate different molecules

In the formula Mg3(P4)2, how many phosphorus atoms are present?

• Two

• Four

• Eight

• Six

Tags

NGSS.MS-PS1-1

In the formula C2H4O taken twice, how many hydrogen atoms are there?

• Ten

• Four

• Six

• Eight

Tags

NGSS.MS-PS1-1

How many total atoms are in the structure Mg3P4 taken twice?

• 13

• 15

• 17

• 19

Tags

NGSS.MS-PS1-1

What is the total number of atoms in the compound Al2S23 taken three times?

• 21

• 15

• 17

• 19

Tags

NGSS.MS-PS1-1