Science & Mathematics - 21 November 2006

benzene and ethyne both have the same empirical formula of CH .if the mass of a mole of one of the compounds is 26 g, what is a possible mass of a mole other compound ?

2006-11-21 14:19:57 · 3 answers · asked by henry f 2 in Chemistry

2006-11-21 14:19:57 · 6 answers · asked by brittanykahlen.s2 2 in Mathematics

1) magnesium nitride

2) calcium oxide

3) silver fluoride

4) beryllium chloride

5) potassium iodide

***thank you in advance =)

2006-11-21 14:16:01 · 7 answers · asked by Anonymous in Chemistry

Machinery's Handbook is too contradictory and I can't make sense of their charts on this. I need to cut some internal Acme threads on a set of jackscrews I am making as a school assignment. The thread is 1/2"-10 Acme. I need to find out the right tap drill size so I have some material left in there for the threads to be made out of.

2006-11-21 14:13:28 · 3 answers · asked by Anonymous in Engineering

find the answer fast!!! please

2006-11-21 14:12:14 · 3 answers · asked by pago 1 in Mathematics

I'm kind of confuse with micron or mil. Please can anyone help.

2006-11-21 14:12:06 · 6 answers · asked by Tech student 1 in Engineering

2006-11-21 14:10:48 · 7 answers · asked by Anonymous in Chemistry

2006-11-21 14:08:13 · 1 answers · asked by Anonymous in Chemistry

I know its hard but if you can figure it out and show me how, i would really appreciate it

If 1 x 10^A + 2 x 10^B + 3 x 10^c + 4 x 10^D = 24,130 and
A ≠ B ≠ C ≠ D then what does A/2 + B/4 + C/8 + d/16 equal?

2006-11-21 14:08:07 · 10 answers · asked by VHS123 2 in Mathematics

Simplify. (a^8b^8)^3

2006-11-21 14:07:54 · 8 answers · asked by jazminda S 1 in Mathematics

If you could dig a straight shallow tunnel through the earth, say from NY to LA, and then evacuate it and put in a zero friction track, you could roll a train from one end to the other with no propulsion system other than gravity. As the train left NY it would roll very slowly, gain speed until it got half way to LA, then start to slow down, pull very gently into the LA station, then stop.

I need mainly the time it takes for the train to go from NY to LA.
I need to know the calculations needed and how to do them.
Thanx!

2006-11-21 14:06:46 · 3 answers · asked by Anonymous in Physics

2006-11-21 14:05:20 · 10 answers · asked by Anonymous in Other - Science

sorry...im completely ignorant about this. where does it belong? pharma? chemicals? i haven't seen microbiology companies here and i was planning which section of the phonebook am i going to start...does anybody know? lol i didnt realize i was this ignorant. toinks!

2006-11-21 14:03:51 · 4 answers · asked by abstemious_entity 4 in Biology

Here is what I need to enter: X^2 -2x +1

I know x ^2 =1

Generally how do you enter the quad equation to solve the equation where X^2 - BX + X into the graphing caculator?

2006-11-21 14:03:16 · 4 answers · asked by Dave 6 in Mathematics

A triangle has sides 2x – 5, 3x + 1, and 4x + 2. Find the polynomial that represents its perimeter.

2006-11-21 14:02:44 · 5 answers · asked by jazminda S 1 in Mathematics

evaluate. 5^-2

How do you solve this kind of problem?

2006-11-21 14:01:42 · 8 answers · asked by jazminda S 1 in Mathematics

2006-11-21 14:00:13 · 11 answers · asked by tbone5shot 1 in Zoology

Divide. 32y^16/4y^4

can someone show me the steps how to do this problem?

2006-11-21 14:00:05 · 6 answers · asked by jazminda S 1 in Mathematics

1) sodium chromate

2) barium nitrate

3) ammonium sulfate

4) aluminum hydroxide

5) calcium phosphate



(*PLEASE NOT THAT THE #'S ARE SUPPOSED TO BE IN SMAL FORM)

2006-11-21 13:54:54 · 2 answers · asked by Anonymous in Chemistry

Using y, x, and a, write a general equation for the parabola whose vertex is at the origin and whose axis of symmetry is the x-axis.

My answers were y^2=x or y^2=-x.

What's the real answer? Or did I get it right.

2006-11-21 13:54:43 · 7 answers · asked by Anonymous in Mathematics

Find: Domain.Range.X int,Y int. Asymtotes, local extrema.Concavity. and if you can try to graph it

2006-11-21 13:53:27 · 3 answers · asked by pago 1 in Mathematics

1) NH(4)Cl

2) HClO(2)

3) Ca(BrO(3))2

4) BeSO(4)

5) (NH(4)) (3)N

6) RbI

(*PLEASE NOT THAT THE #'S ARE SUPPOSED TO BE IN SMALL FORM)

2006-11-21 13:49:47 · 3 answers · asked by Anonymous in Chemistry

2006-11-21 13:49:16 · 7 answers · asked by hhskd922 2 in Physics

2006-11-21 13:46:04 · 4 answers · asked by maggzbaby 1 in Astronomy & Space

I need help with these questions. Answer as many as you can.

1) Gases do not form liquids, unless the temperature is lowered, because of the
a) extremely small size of the gas particles
b)relatively slow motion of the gas particles
c)weak attractive forces between particles
d)presence of repulsion forces between particles.

2)One way for a balloon to rise in air is to
a)heat the air inside the balloon
b)increase the pressure of the air inside the balloon
c)choose a gas with a weight less than the air it displaces
d)choose a gas with a density greater that the air it displaces

3) Which of the following gases would you expect to have the greates lifting power?
a)hydrogen
b)oxygen
c)astatine
d)hydrogen fluoride

2006-11-21 13:39:47 · 3 answers · asked by Anonymous in Chemistry

x -2 -1
-3 x all equals zero.

There are two answers

2006-11-21 13:36:01 · 2 answers · asked by twistacm 1 in Mathematics

Then do this :)

Simplify:

- (2x – 3y) + 3(3x + y)

2006-11-21 13:34:55 · 22 answers · asked by Anonymous in Mathematics

I'm desperate!!! please help me! I have to write a story from the point of view of a rock. (does it become metaconglomerate?)

2006-11-21 13:33:11 · 2 answers · asked by alex wolfgang black 2 in Earth Sciences & Geology

http://online.math.uh.edu/webct/spring06/1310/pt5/images/pt5_f05_problem21__43.gif

By the way, thank you so much for helping me out (those who replies to my other boards) It means a lot, I have a final coming up!

2006-11-21 13:30:20 · 5 answers · asked by saira n 1 in Mathematics

how do you find it?
I need to know the Mass in grams of CO2
can you also show me the steps
THANKS

2006-11-21 13:28:36 · 5 answers · asked by Smile.. it makes a difference! 1 in Chemistry