Biol211Ch3

A mole of table sugar and a mole of vitamin C have the same:

• Mass
• Volume
• Number of atoms
• Number of molecules
• Specific heat

Which of the following is hydrophobic?

• Paper
• Table salt
• Cotton
• Sugar
• Wax

Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake?

• 4.0 M

• 10⁴

• 10^-4

• 10¹⁰

• 10^-10

In solution, an acid increases the concentration of:

• hydrogen ions
• hydroxide ions
• water molecules
• electrons
• neutrons

Adhesion:

• is the clinging of one substance to itself
• is the clinging of one substance to another
• is a measure of how difficult it is to stretch or break the surface of a liquid
• allows a spider to walk on the surface of a pond

1 calorie is the amount of heat it takes to heat what amount of water by 1°C?

• 1L
• 100g
• 10g
• 1g
• 0.1g

Tags

NGSS.MS-PS3-4

Which characteristic of water molecules explains the 4 emergent properties that enable life?

• Covalent bond between oxygen and hydrogen
• Covalent bonds between adjacent water molecules
• Hydrogen bonds between adjacent water molecules
• Ionic bonds between adjacent water molecules
• Ionic bonds between oxygen and hydrogen

1 "calorie" as listed on a food packages actually equals how many true calories?

• 1
• 10
• 100
• 1000
• 10,000

What are the 4 emergent properties of water that are important for life?

• cohesion, expansion upon freezing, high heat of evaporation, capillarity
• cohesion, moderation of temperature, expansion upon freezing, solvent properties
• moderation of temperature, solvent properties, high surface tension, capillarity
• heat of vaporization, high specific heat, high surface tension, capillarity
• polarity, hydrogen bonding, high specific heat, high surface tension

Water shows high cohesion and surface tension and can absorb large amounts of heat because of large numbers of which type of bonds between water molecules?

• strong ionic bonds
• nonpolar covalent bonds
• polar covalent bonds
• hydrogen bonds
• weak ionic interactions

Tags

NGSS.HS-ESS2-5