Chemistry - October 2006

2006-10-23 16:59:54 · 6 answers · asked by laxeroflax04 2

2006-10-23 16:58:16 · 2 answers · asked by Bill B 2

I need a UV, light, not "black light" that has a much stronger, lighter glow for my genetics class, where could I get it and how much money would it cost?

2006-10-23 16:40:35 · 2 answers · asked by mr.jeremy 2

If the pH of 0.043 M BH+ is 6.44, find PKb for the weak base, B

2006-10-23 16:11:48 · 2 answers · asked by justjbk 3

Consider an acid, HA, with pKa = 8.259. 0.129 moles of hydroxide ion are added to 13.83mL of a 0.931M solution of the acid. What is the resulting pH?

So I know pH = pKa + log([acid]/[base])

So really, how would I find the concentration of the base and the new concentration of the acid? If I have those, I can do the rest.

Thanks for any help!

2006-10-23 16:11:42 · 2 answers · asked by Anonymous

Can someone please explain to me how to do the following problem please?
The heat of combustion of C8H18 is 47.8 kJ/g and one gallon of C8H18 has a mass of 2620g. If a car using C8H18 is driven 10,000miles in one year and gets 25mpg of C8H18, what is the total energy consumption?

2006-10-23 16:03:22 · 1 answers · asked by foxtrot 3

2006-10-23 16:01:21 · 6 answers · asked by Anonymous

How do you draw a formation of a peptide bond with two amino acids in structural formation?

2006-10-23 15:40:38 · 5 answers · asked by Anonymous

1. a radioisotope has a half life of 4 days. How much of a 20 gram sample of this radioisotope remains at the end of each time period.
a. 4 days
b. 8 days
2. the mass of cobalt-60 in a sample is found to have decreased from 0.800 g to 0.200 g in a period of 10.5 years. From this info calculate the half life of cobalt-60

please answer these, i really need help

2006-10-23 15:35:08 · 4 answers · asked by BlahBlahBlah 3

2006-10-23 14:37:06 · 7 answers · asked by <--tsk--> 3

2006-10-23 14:31:53 · 5 answers · asked by chippa_10 2

2006-10-23 14:01:15 · 6 answers · asked by chelsea 3

Can someone please help me balance this equation:

NO2- (aq) + Al(s) ==> NH3(g) + AlO2- (aq)

2006-10-23 13:50:43 · 1 answers · asked by unt1lid13 1

how much will an ounce of iron cost me?

2006-10-23 13:46:53 · 2 answers · asked by mireya v 1

A student determined that one of the lines in the hydrogen atom spectrum had a wavelength for which the calculated photon energy was 4.1 x 10-19 joules. To what electronic transition in the hydrogen atom should this line be assigned?

a. 7 - 2
b. 6 - 2
c. 5 - 2
d. 4 - 2
e. 3 - 2

I am not even sure what it is asking me to do?

2006-10-23 13:40:08 · 3 answers · asked by Anonymous

Answer for below questions for the following ion


F2+


a) how many electrons are in bonding orbitals?
b) how many electrons are in antibonding orbitals?
c) what is the bond order of the ion?

2006-10-23 13:29:48 · 2 answers · asked by MARK 2

2006-10-23 13:14:12 · 4 answers · asked by summer 1

2006-10-23 13:11:05 · 15 answers · asked by babbsie_101 2

2006-10-23 13:03:11 · 6 answers · asked by nicole0691 1

What do Tin- Sn, Lead- Pb, and Bismuth- Bi have in common. Are they Transition metals or not

2006-10-23 12:58:35 · 4 answers · asked by THE ICE AGE 2

(Assume that the volumes are additive.)

(c) 3.50 g of NaCl in 58.6 mL of 0.425 M CaCl2 solution
Na+___M

Ca2+__M

Cl -____M

2006-10-23 12:41:27 · 1 answers · asked by Poopz 2

2006-10-23 12:26:47 · 18 answers · asked by Anonymous

1) Al (OH)3 (2) NH3 (3) LiOH

2006-10-23 12:14:49 · 3 answers · asked by BILLY D 1

I need help:

Benzene is a nonpolar solvent, would you expect sodium chloride to dissolve in benzene (C6H6)?

2006-10-23 12:13:13 · 3 answers · asked by Mia16 3

It contains 92.26% C. what is its empirical formula? A) C3H4 B)CH2 C) C2H3 D)CH E)C2H5

2006-10-23 12:09:20 · 2 answers · asked by BILLY D 1

2006-10-23 12:06:42 · 5 answers · asked by z 2

A) Cu + 2Ag+=Cu2+ 2Ag (B)NH4 2NO2= N2+2H2O (C)N2+3H2= 2NH3 ( D) 2CrO42- +2H+ = Cr2O7- +H2O (E) C2H4 + H2= C2H6

2006-10-23 12:05:30 · 2 answers · asked by BILLY D 1

2006-10-23 12:01:03 · 2 answers · asked by voraciousant 2

2006-10-23 11:58:43 · 2 answers · asked by t-man foshizzle 2

2006-10-23 11:50:46 · 3 answers · asked by arielle t 1