Pentathlon 2023-Science

What is the name of the method when acids and bases are mixed and the pH is monitored as different amounts react?

• Acidity test

• Concentration

• Titration

• Hydration

Why do metals have a lustrous appearance?

• reflection of light from the arrangement of atoms

• absorption of light from the arrangement of atoms

• the difference in atomic structure between light in metal

• the similarities between light and metal atomic structures

Tags

NGSS.HS-PS4-3

_______ conditions can be measured such that the rate at which particles leave a phase is the same as the rate at which they enter the phase.

• Balance

• Equilibrium

• Harmony

• Synergy

Tags

NGSS.HS-PS1-5

What is the most abundant element in the universe?

• Hydrogen

• Nitrogen

• Oxygen

• Helium

Tags

NGSS.HS-ESS1-2

If hydrolysis results in the anion of salt reacting with water to produce the conjugate acid of the anion and hydroxide ion, the solution will be what?

• Acidic

• Basic

• Neutral

• Cation

Compounds with ionic bonds exist as a lattice network extending in three direct dimensions, what is the most common example of this?

• Acetic acid

• Nitrous oxide

• Methane

• Sodium chloride

Tags

NGSS.HS-PS1-3

Why does ice float on water?

• The structural changes cause the molecules to attract one another.

• Solid water is heavier than liquid water.

• Solid water has a lower density than liquid water.

• Solid water has a higher density than liquid water.

Which of the following is a rule of oxidation numbers?

• All neutral atoms have an oxygenation number of zero.

• All oxygenation numbers must be greater than one.

• All oxygenation numbers are positive.

• All oxygenation numbers are negative.

What are mixtures of substances that are homogeneous, meaning that no change in properties can be detected throughout the sample?

• Concentrations

• Stabilizers

• Compounds

• Solutions

What is the name of the outer most electrons?

• Valence electrons

• Perimeter Electrons

• Molecular coefficients

• Lewis Structures

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2