STOICHIOMETRY-MOLE CONCEPT

How many atoms of oxygen are there in a molecule of water?

• 1

• 2

• 3

• 4

How many molecules are there in a mole of glucose (C6H12O6)?

• 6.02x10^23

• 2.06x10^32

• 6.02x10^32

• 2.06x10^23

What type of substance is sodium chloride?

• Pure Substance-Element

• Pure Substance-Compound

• Pure Substance-Ions

• Pure Substance and Mixture

Which of the following mass will you solved for hydrochloric acid (HCl)?

• Formula Mass

• Atomic Mass

• Molecular Mass

• Atomic Weight

You can calculate the formula mass of the following compounds EXCEPT?

• Aluminum oxide

• Zinc chloride

• Carbonic acid

• Silver nitrate

You are given the mass of the substance which of the following will you use to calculate the number of moles?

• mass in grams multiplied by molecular or formula mass

• molecular or formula mass divided by mass in grams

• mass in kg multiplied by its atomic weight

• mass in grams divided by molecular or formula mass

Which of the following formula will you use when you want to find out the mass of a substance given its number of moles?

• number of moles divided by the formula or molecular mass

• molecular or formula mass times the number of moles

• number of moles divided by the molecular or formula mass

• Formulas mass multiplied by the mass given

The unit use to express formula or molecular mass is ____________.

• grams (g)

• unified atomic mass unit (u)

• moles (n)

• Avogadro's number (N)

The molecular formula of Sodium Chloride is _________. If sodium is 23 and chlorine is 35.

• 58.0g

• 58.0g/mol

• 58.0particles

• 58.0N

The empirical and molecular formula of aluminum oxide are the same.

• TRUE

• FALSE