Blog 12 due 12/04 at 10:00 pm

Ammonia reacts with oxygen gas to produce nitrogen monoxide and water.
a. Write a blalnced equation for this reaction.
b. If 25 grams of ammonia is placed in a chamber with excess oxygen, how much nitrogen monoxide will be produced?

Blog 11 due 10/31 10:00 am

Write the oxidation number for each element in the following substances:

LiBF4

CaCO3

H3O+

CuSO4

Blog 10 Due Monday Oct 24 10:00 pm

Determine the electronegativity difference, probable bond type, and then arrange them in order from  least to greatest bond/lattice energy.

a. H and I
b. S and O
c. K and Br
d. C and H

Blog 7 due 10/03/2011 at 10:00am

Which of the following does NOT have noble gas configuration:
Na+, Rb+, O2-, Br-, Ca+, AL3+, S2-

Blog 6 due mon 9/26

What is the wavelength of a wave with an energy of 1,000,000 Joules and a frequency of 0.00025 Js? Is it in the visible spectrum?Hint: use the speed of light and energy equations combined.

Blog 5 Chemistry

IDENTIFY THE FOLLOWING ELEMENTS BASED ON THE ELECTRON CONFIGURATION:

A. 1S22S2SP5=
B. 1S22S22P63S1
C. 1S22S22P63S23P4
D. [Ne] 3S23P1

Chem Blog 3

Naturally occurring boron is 80.20% boron 11(atomic mass 11.01 daltons) and 19.80% of some other isotope. What must the mass of the other isotope be in order to have an average atomic mass of 10.81 daltons?

Chemistry Blog 2

Element Z was recently discovered and has three different isotopes. Isotope 1 has a mass of 45 daltons and is found in nature 33% of the time. Isotope 2 has a mass of 46 daltons and is found in nature 57% of the time, and Isotope 3 is 48 daltons and is found in nature 10% of the time. What is the average atomic mass of element Z?

Chem post 1

How can the scientific method be applied to our everyday lives?