5th Six Weeks Exam

Gas inside a balloon originally had a volume of 3.12 L. Ernesto decides to sit on the balloon and compresses it to a final volume of 0.12 L and a final pressure of 3.14 atm. What was the original pressure?

• 2.29 atm

• 0.12 atm

• 8.28 atm

A sample of gas has an original temperature of 50°C. It is cooled to a final temperature of -10°C and has a final volume of 0.05 L. What was its original volume?

(Enter just the number and round to the nearest hundredths...your answer should have two numbers after the decimal)

• 0.12 L

• 16.28 L

• 0.06 L

A gas has an original temperature of 25°C. It is heated to a final temperature of 48°C and has a final pressure of 2.64 atm. What was its original pressure?

• 2.46 atm

• 0.41 atm

• 2.84 atm

Gas inside a balloon has an original volume of 1.68 L with an original amount of 0.68 moles. Moles are increased and there is a final amount of 3.14 moles. What is the final volume?

• 7.76 L

• 0.13 L

• 0.36 L

A sample of gas 2.5 L of a gas at 36°C has a pressure of 2.97 atm. How many moles are in this sample?

• 0.29 mol

• 3.42 mol

• 2.51 mol

What are 4 factors that affect solubility?

Please place them in alphabetical order.

a

f

i

j

Stirring

Solutions

Insoluble

Particle Size

Solute

Alloy

Soluble

Pressure

Suspension

Temperature

Tags

NGSS.HS-PS1-5

A solution that has water as a solvent called ​ (a)   .

• Aqueous solution
• Solid solution
• Gas solution
• Solute
• Solvent
• Homogeneous
• Suspension

A temporary solution that after it is mixed will eventually settle out is called a(n)​ (a)  

• Suspension
• Solution
• Emulsion
• Solute
• Solvent
• Homogeneous

What is the molarity of a solution formed by dissolving 0.45 mol of potassium hydroxide (KOH) in enough water to form 0.674 L of solution?

• 0.67 M

• 1.50 M

• 0.30 M

What is the molality of a solution formed by dissolving 1.2 moles of a solute in 0.800 kg of solvent?

• 1.5 m

• 0.67 m

• 0.96 m