Chemistry Spring Final 2021

Which of the following balances the following chemical equation?

_____P + ____O₂ → ____P₂O₅

• 2,3,1

• 2,5,2

• 4,5,2

• 4,4,2

What is the percent composition of magnesium in MgCl₂?

• 25.5 %

• 33.3%

• 40.6%

• 66.7%

Calculate the pH of a solution if [H⁺]= 1 x10^-11

• 3

• 10.89

• 11

• 9

Emmerie has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper turns red. The substance in the beaker-

• is an acid

• is a base

• is neutral

• cannot be determined

Correct name for LiCl?

• Lithium Chloride

• Lithium Chlorate

• Lithium monochloride

• Monolithium monochloride

In the reaction, N₂ + 3 H₂ → 2 NH₃, what is the mole ratio of hydrogen to nitrogen?

• 1:1

• 1:2

• 3:1

• 3:2

What is the molar mass of C₆H₁₂O₆?

• 180.16 g/mol

• 180.12 g/mol

• 180.24 g/mol

• 180.06 g/mol

What are properties of acids?

• Bitter, slippery, pH above 7

• Sour, reacts with metals, pH below 7

• Sour, reacts with metals, pH above 7

• Bitter, pH of 7, does not react with metals

What are properties of a base?

• Slippery, bitter, does not react with metals, pH above 7.
• Slippery, bitter, reacts with metals, pH below 7.
• Sour, reacts with metals, pH below 7
• Sour, reacts with metals, pH above 7.

Avogadro's number of representative particles is equal to one_____.

• kilogram
• gram
• kelvin
• mole