« previous next »

Author Question: Why do water drops bead on a freshly waxed surface? A) The wax, which is nonpolar, pushes the ... (Read 33 times)

soccerdreamer_17

  • Hero Member
  • *****
  • Posts: 552
on: Aug 27, 2018
Why do water drops bead on a freshly waxed surface?
 
  A) The wax, which is nonpolar, pushes the water into a bead shape.
  B) The strong cohesive forces between water molecules attract each other and the result is a sphere, which is squashed down into a bead by the force of gravity.
  C) Water's cohesive forces between molecules results in a spherical shape and prevents the water droplet from spreading out evenly over the wax.
  D) A freshly waxed surface carries a small electrical charge, which repel the outer electrons on the water molecules.

Question 2

If you mix a typical aluminum ion (Al, atomic no. = 13 ) with a typical oxygen ion (O, atomic no. = 8 ), what compound is formed?
 
  A) Al2O3
  B) Al3O2
  C) Al13O8
  D) Al3O
  E) Al2O2


Jsherida

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Aug 27, 2018
Answer to Question 1

B

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

soccerdreamer_17

  • Hero Member
  • *****
  • Posts: 552
Reply #2 on: Aug 27, 2018
Both answers were spot on, thank you once again


Jsherida

  • Sr. Member
  • ****
  • Posts: 314
Reply #3 on: Aug 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Water Molecules Water Molecules
water movement water movement
Properties of Water Properties of Water
viable surface sampling using contact plates viable surface sampling using contact plates
Lakes and standing water Lakes and standing water
Hydrozoan. Hydra, a freshwater species capturing and digesting a water flea. Hydrozoan. Hydra, a freshwater species capturing and digesting a water flea.
Video: Depolarization of the SA node, Action potentials of the myocardium & ANS effects

For a complete list of videos, visit our video library