Science & Mathematics - 17 October 2006

2006-10-17 08:00:19 · 9 answers · asked by Gabriel B 1 in Engineering

cud anyone help me with this

mass of iron (II)ammonium sulphate used is 0.0693 +/- 1x10-4 g

Relative molar mass: 392.14

hence the molarity of standard solution:

............................. +/- ......................... moldm3

the volume of the standard solution is 1000cm3 by the way

how do i work out the errors with the molarity

2006-10-17 07:59:15 · 9 answers · asked by Anonymous in Chemistry

5/8 - 75/120

2006-10-17 07:58:33 · 8 answers · asked by momoftwins1986 1 in Mathematics

ok, well i actually kinda have 2. we have to make a made up galaxy, and i was wondering what color would be more appropriate for the sun (orange or yellow) and if i use yellow, would blue spots stand for the cold spots on the sun ? or would the cold spots be a different color ? if u don't get what i'm saying, then just leave a comment so i can explain it better

2006-10-17 07:55:29 · 8 answers · asked by Melissa♥ 3 in Astronomy & Space

What nerve would be damanged if a person is unable to flex their left hip or extend their left knee but they are in no pain?

2006-10-17 07:51:07 · 2 answers · asked by Erin D 2 in Other - Science

2006-10-17 07:50:48 · 3 answers · asked by Justin 2 in Other - Science

2006-10-17 07:50:35 · 53 answers · asked by Kizzy_ 5 in Other - Science

2006-10-17 07:47:58 · 7 answers · asked by spokane_emo_boy 1 in Astronomy & Space

2006-10-17 07:47:51 · 17 answers · asked by Anonymous in Astronomy & Space

and an object could travell in two directions at the same time.
Electrons seem to do that.
If we lived in 2d space we would have no idea what up and down is, mabe our unidirectional time limits us and we have no idea what travelling in two directions at the same time is.
What do you think?

2006-10-17 07:47:41 · 6 answers · asked by Yahoo! 5 in Physics

2006-10-17 07:40:29 · 3 answers · asked by All.your.answers 2 in Chemistry

my scocil studys teacher wanted us to find out the 1 president that was elected 3 times... not in a row but at diffrent times can any1 help me!

2006-10-17 07:39:53 · 6 answers · asked by why hello there 2 in Geography

2006-10-17 07:38:03 · 5 answers · asked by BOISESTATEFAN208 1 in Physics

2006-10-17 07:35:40 · 2 answers · asked by Madhur 1 in Botany

2006-10-17 07:32:56 · 2 answers · asked by Ghee 1 in Zoology

2006-10-17 07:30:27 · 2 answers · asked by Anonymous in Other - Science

2006-10-17 07:29:51 · 8 answers · asked by luan r 2 in Zoology

Recently i went to a science show and they set up an experiment where they ran a light bulb on just a potato and another on just a an apple.
I know this is possible, however I don’t know the science behind it.
Could u give me a hand?

2006-10-17 07:29:49 · 3 answers · asked by Anonymous in Chemistry

2006-10-17 07:19:35 · 4 answers · asked by Lester G 1 in Astronomy & Space

2006-10-17 07:19:14 · 1 answers · asked by chastityelizabeth 5 in Other - Science

TA says that nitric acid is not acting as an acid. What role is nitric acid playing?

2006-10-17 07:18:14 · 5 answers · asked by Josh 1 in Chemistry

2006-10-17 07:15:34 · 7 answers · asked by Anonymous in Engineering

2006-10-17 07:14:57 · 2 answers · asked by nandu 1 in Physics

check my answer and sig figs please

Calculate the pH of the solution below. Show chemical equations for all equlibria involved. Include complete dissociations whenever necessary.

0.55M ammonium choride and 0.80 M ammonia.

okay I had a Pkb of 4.76, I changed this to Kb = 1.7 x 10^-5

NH4CL ---H20---> NH4+ Cl-

all of these are .55M

NH3+H20<--> NH4+ + OH-

okay I have the Molarity of NH4+ and NH3 now

the ICE method gives an equation of (0.55+x)(x)/(0.80-x)=
1.7x10^-5

x= 2.5x10^-5 = [OH-]
change to pOH by -log = 4.60 pOH 14-4.60 = 9.40 = PH

so pH = 9.40

2006-10-17 07:14:24 · 1 answers · asked by farxfromxlonelyx 1 in Chemistry

why we call the aliens to living things that live out of earth.do you think that someone is living somewere else but not on earth.

2006-10-17 07:12:56 · 23 answers · asked by Anonymous in Astronomy & Space

2006-10-17 07:07:37 · 7 answers · asked by richard e 1 in Biology

2006-10-17 07:03:34 · 1 answers · asked by Anonymous in Biology

2006-10-17 07:02:27 · 1 answers · asked by c_sewe11 1 in Other - Science

What are the sign conventions of work done by the system in thermodynamics?

2006-10-17 07:00:19 · 2 answers · asked by Mihir Durve 3 in Chemistry

2006-10-17 06:56:12 · 1 answers · asked by Anonymous in Biology