Lois Said:

Easy points middle school chemistry?

We Answered:

96.8 kPa to atm = .955 atm

PV=nRT
.955 atm x 20L = n x .0821 x 298K
n = .781 moles of Argon

Ashley Said:

A great middle school chemistry science fair idea?(please i need this under 5 min and due 2moro)?

We Answered:

Make a potato gun and test different distances of objects (Potatoes, apples, tennisballs, pears.) I did it when i was little, just fire them at the same angle at the same PSI all you need is PVC pipe, glue, and an air compressor, you just cant take your gun in the school for obvious reasons. for your hypothesis: If I shoot a potatoe and an apple out of a spud gun, then the potatoe will go further because it is more dense. or something along the lines of that, my school let me do that, but that was 5 years ago...

Jonathan Said:

Can you help me w/this middle school Chemistry question?

We Answered:

A. average atomic mass - it is true that the average atomic mass is different, but that does not explain the difference in a metal and a nonmetal.
B. # of valence electrons - since they are in the same group the trend states that they have the same number of valence electrons. So that one is out.
C. average atomic radius - This is a periodic trend that states as you move down a group the average atomic radius increases. This makes sense because there are more electrons in lead than carbon.
D. # of isotopes - Nothing to do with the property of metal or nonmetal

Amber Said:

What should i do for my inter school (middle school) science fair that about chemistry?

We Answered:

GO TO WHAT I TOLD YOU TO GO TO ON THE SOUCERS LIST

Melissa Said:

Come up with best multiple choice test question! - Middle School Chemistry #2?

We Answered:

How does salt (sodium chloride) differ from it's constituent elements (sodium and chlorine).

A. Salt is a harmless solid, chlorine is a poisonous gas.
B. Salt disolved in water, sodium burns in water.
C. Sodium is a metal, salt is a . . . well . . . salt.
D. All of the above.