5th Six Weeks Remediation Quiz

Formula for barium sulfide

• B₂S₃

• BaS

• Ba₂S

• BaS₂

Tags

NGSS.MS-PS1-1

Formula for lead (II) chloride

• PbCl₂

• Pb₂Cl

• Pb₂Cl₃

• Pb₃Cl₂

Tags

NGSS.MS-PS1-1

silicon dioxide

• SO₂
• NaO₂
• SiO₂
• SiO

Tags

NGSS.MS-PS1-1

What is a water molecule composed of?

• 1 Hydrogen atom and 2 Oxygen atoms
• 2 Hydrogen atoms and 1 Oxygen atom
• 3 Oxygen atoms
• 2 Helium atoms and 1 Oxygen atom

Tags

NGSS.MS-PS1-1

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

The substance being dissolved is called the ________

• solvent

• solid

• solute

• solvate

What does "like dissolves like" mean?

• polar solvents dissolve in polar solutes

• polar solutes dissolve in polar solvents

• non-polar solvents dissolve in polar solutes

• non-polar solutes dissolve in polar solvents

Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?

• The insects are light enough so they do not break the hydrogen bonds holding the water molecules together
  
• The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.
• The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.
• The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
  

Tags

NGSS.MS-PS2-5