Unit 4 Test Review: Naming Compounds, molarity, Thermochemistry

Front

What is the formula to calculate moles from volume and molarity?

Back

Moles = Molarity (M) × Volume (L)

Front

If you have 0.045 L of 0.465 M potassium bromide, how many moles of potassium bromide are present?

Back

0.0209 mol

Front

What does an energy level diagram represent in thermochemistry?

Back

It shows the energy changes during a chemical reaction, indicating whether the reaction is exothermic or endothermic.

Front

What is the name of Mg(OH)2?

Back

Magnesium Hydroxide

Front

How many grams of KNO3 can be dissolved in 100 grams of water at 100 degrees Celsius?

Back

250 grams

Front

What is the heat of fusion (Hfus) for water?

Back

6.00 kJ/mol

Front

How much energy must be removed to freeze 150.0 grams of water at 0.0 C?

Back

49.9 kJ

Front

Define molarity.

Back

Molarity is the number of moles of solute per liter of solution (mol/L).

Front

What is an exothermic reaction?

Back

A reaction that releases energy, usually in the form of heat.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.