Chemistry

Chemical Reactions

100

What is Endothermic v.s. Exothermic

Endothermic is when heat is absorbed and Exothermic is when heat is released

200

Identify the type of reaction below:

NaCl (aq) + H2 (g) ----> HCl (aq) + Na (s)

What is: single replacement.

300

Give an example of a Chemical Reaction

• Combustion: Burning wood or gasoline combines oxygen with hydrocarbons to release energy (heat), water, and carbon dioxide.
• Acid-Base Reaction: Mixing baking soda and vinegar produces a rapid reaction that creates carbon dioxide gas, resulting in fizzing and bubbling.
• Oxidation (Rusting): Iron combines with oxygen and moisture over time to form iron oxide (rust).
• Photosynthesis: Plants convert carbon dioxide and water into glucose and oxygen using energy from sunlight.
• Digestion: Stomach acids and enzymes continuously break down complex food molecules into simple nutrients your body can use. [1, 2, 3, 4, 5, 6]

400

What is the missing letter in a Periodic Table?

What is: J

500

What are the five indicators of a chemical change?

What is: change in energy (heat/light), production of a gas, new chemical formed (solid), change in color, and formulation of precipitate.

Stoichiometry

100

What is Avargardos number

What is 6.022 x 10 23

200

What is the Law of Conservation of Mass?

What is: Matter can never be created nor destroyed, only transfered.

300

1. Carbon monoxide reacts with oxygen to produce carbon dioxide. If 1.0 L of carbon monoxide reacts with oxygen at STP,

a. how many liters of oxygen are required to react?

What is:  0.5 L O₂

400

What is element has an 208.98 Average Atomic Mass on the periodic table?

What is: Bismuth

500

If 45.0 L of natural gas, which is essentially methane (CH₄), undergoes complete combustion at 730 mm Hg and 20 Celsius , how many grams of each product are formed?

 What is: CO₂ = 79.2 grams, H₂O = 64.8 grams

Acids + Bases

100

What is Kw?

What is: Kilowatt

200

What color is an Acid v.s. a base indicator color?

 What is: litmus paper turns pink/red in acidic solutions (pH < 7) and blue in basic solutions (pH > 7)

300

What is a titration?

What is: a laboratory method used to find the exact concentration (amount) of a specific chemical in a solution (aproxímate wording)

400

What is the Ph of stomach acid

What is: 2

500

What are the ingredients in gunpowder and what is their ratio?

What is: Gunpowder (or black powder) is a mixture of three primary ingredients: potassium nitrate (saltpeter), charcoal, and sulfur. Traditional black powder consists of about 75% saltpeter, 15% charcoal, and 10% sulfur by weight

Gas Laws

100

What is the Ideal Gas Law?

What is: PV=nRT

200

What is ¨n¨ in the ideal gas laws formula PV=nRT

What is: number of Moles

300

What gas is called ¨The Silent Killer¨?

What is: Carbon Monoxide (CO)

400

Who wrote one of the fundamental Gas Laws?

Who is:  Robert Boyle, Jacques Charles, Gay-Lussac and Avogadro

500

What is the force of a gas?

What is: Pressure

Nuclear C./Random

100

Balance and describe this equation: H₂o

What is: for every two hydrogen there are one oxygen item

200

What is the chemical symbol of Beta?

What is: B^-

300

While oxygen gas is colorless, its liquid and solid forms are: _______ ?

What is: Blue

400

How many legs does a Water Bear have?

What is: 8

500

What food is ytterbium in?

What is: Corn, Almonds, Pistachios, Cucumbers