STEM Quiz Bee Finals

Which of the following terms means that a crystal has the ability to capture and hold water molecules?

• hydroponic

• hygroscopic

• hydrophobic

• hydropholectic

Which of the following terms has as its definition: a mixture having continuous and dispersed phases?

• colloid

• solute

• suspension

• solvent

Which of the following terms denotes the polar molecules or negative ions clustered about a central positive ion?

• dipoles

• isomers

• complex ions

• ligands

The difference in the osmotic pressures of one molar solutions of different compounds in a given solvent at a given temperature results from?

• Different values for R

• Different values for Avogadro's number

• Ionization or dissociation

• None of the above

Which of the following substances would be the best choice to neutralize sulfuric acid?

• sodium hydroxide

• silicon dioxide

• copper metal

• phosphorus pentoxide

Which of the following would be least soluble in water?

• Magnesium Bromide

• Sodium Oxide

• Carbon Tetrachloride

• Potassium Phosphate

Elements that exist in two or more distinctly different solid forms are known as:

• allotropes

• azeotropes

• isotopes

• isochores

For the hydrogen atom, which series describes electron transitions to the N=1 orbit, the lowest energy electron orbit? Is it the:

• Lyman series

• Balmer series

• Paschen series

• Pfund series

One barrel of oil has about the same heat content as how much coal:

• 70 pounds

• 700 pounds

• 1,400 pounds

• 2,800 pounds

The idea that we CANNOT know both the position and velocity of a subatomic particle at the same time was formulated by:

• Einstein

• Heisenberg

• Fermi

• Schrödinger