Chemistry final review 23

A catalyst is

• the product of a combustion reaction

• not used up in a reaction

• one of the reactants in a single-replacement reaction

• a solid product of a reaction

What is the mass of 1.2 x 10²⁴ atoms of C?

• 2.0 grams

• 24 grams

• 0.17 grams

• 1.4 x 10²⁵ grams

What is the molar mass of table salt (NaCl)? Read all options! Be careful!

• 58.44 amu

• 35.45 g/mol

• 22.99 g/mol

• 58.44 g/mol

Determine the mass of 4.20 moles of C₆H₁₂

• 353 g

• 0.0499 g

• 337 g

• 2.53 x 10²⁴ g

What physical state symbol should be included for oxygen?

• (s) - solid

• (l) - liquid

• (g) - gas

• (aq) - aqueous

The numbers needed to balance the equation are:

• 2, 7, 6, 4
• 2, 1, 3, 2
• 3, 1, 1, 3
• 2, 3, 1, 3

The numbers needed to balance the equation are:

• 1, 1, 1, 2
• 1, 1, 2, 2
• 1, 1, 1, 1
• 2, 3, 1, 3

What physical state symbol should be included for water?

• (s) - solid

• (l) - liquid

• (g) - gas

• (aq) - aqueous

When two substances react to form products, the reactant which is used up is called the

• determining reagent

• excess reagent

• limiting reagent

• catalytic reagent

Avogadro's number of representative particles is equal to

• mole

• kilogram

• kelvin

• gram