CHEM B week9 final quiz

Is photosenthysis an Exothermic or an Endothermic reaction?

• Endothermic

• Exothermic

At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K₂Cr₂O₇?

• 60 ºC

• 30 ºC

• 50 ºC

• 83 ºC

Charles' Law States...

• As Pressure goes up volume goes down

• As Pressure goes up temperature goes up

• As Volume goes up temperature goes up 

• As Pressure goes down volume goes down 

Which of the following statements regarding the mole is INCORRECT?

• A mole is a unit of quantity equal to 6.02 x 10²³ particles.

• The number of particles in a mole is known as Avogadro’s number.

• A mole of particles of an element is numerically equal to the atomic mass of the element.

• none of the above

The mass of one mole of an element is equal to

• its atomic number from the periodic table, but in amus.

• its atomic mass from the periodic table, but in amus.

• its atomic mass from the periodic table, but in grams.

• its atomic number from the periodic table, but in grams.

What is the molar mass of PbSO₄?

• 303.27 g/mol

• 255.27 g/mol

• 163.87 g/mol

• 372.27 g/mol

A  pH and a pOH will add up to:

• 0

• 7

• 14

• 1.0 x 10^-14

Determine the mass of 4.20 moles of C₆H₁₂

• 353 g

• 0.0499 g

• 337 g

• 2.53 x 10²⁴ g

If the pH of a solution is 7 the solution is said to be

• Acidic

• Basic

• Neutral

• Tasty

Gas Laws involve what three terms?

• Solid Liquid Gas 

• Speed Velocity Acceleration 

• Elements Compounds Mixtures 

• Pressure Temperature Volume