Exploring Molecule Values through Formulas and Subscripts

The video tutorial explains the basics of chemical formulas, focusing on how they convey information about the elements, atoms, and molecules in compounds. It uses examples like Fe2O3, sodium acetate, calcium hydroxide, and nitric acid to illustrate how to interpret chemical formulas. The tutorial covers the role of element symbols, subscripts, and coefficients in determining the composition of compounds and the total number of atoms present. It also demonstrates the application of the distributive property in calculating the total number of atoms in multiple molecules.

What does a subscript in a chemical formula indicate?

• Type of chemical bond

• State of the substance

• Number of molecules

• Number of atoms of each element

What elements are present in Fe2O3?

• Sodium and Oxygen

• Iron and Oxygen

• Carbon and Oxygen

• Iron and Hydrogen

Tags

NGSS.MS-PS1-1

How many total atoms of oxygen are in two molecules of Fe2O3?

• Nine

• Six

• Twelve

• Three

Tags

NGSS.MS-PS1-1

What is the chemical name of NaC2H3O2?

• Sodium bicarbonate

• Sodium chloride

• Sodium acetate

• Sodium carbonate

How many atoms of hydrogen are in sodium acetate?

• Four

• Two

• Three

• One

Tags

NGSS.MS-PS1-1

What elements does calcium hydroxide contain?

• Calcium, Oxygen, Hydrogen

• Calcium, Hydrogen, Nitrogen

• Calcium, Oxygen, Carbon

• Calcium, Sulfur, Oxygen

Tags

NGSS.MS-PS1-1

How many atoms of oxygen are in one molecule of calcium hydroxide?

• Four

• Three

• Two

• One

Tags

NGSS.MS-PS1-1

What is the total number of nitrogen atoms in three molecules of HNO3?

• Nine

• Three

• Two

• One

How many molecules of nitric acid are indicated by the formula 3HNO3?

• Three

• Four

• Two

• One

In nitric acid, what is the ratio of hydrogen to nitrogen atoms per molecule?

• 1:1

• 2:1

• 1:2

• 1:3

Tags

NGSS.MS-PS1-1