Science & Mathematics - 28 January 2007

What is the concentration of NH3 in household ammonia when 48.25 mL of 05246M HCL are needed to neutralize 22.00 mL of the ammonia solution?

What does the M stand for?
What is the end answer?

That's all I need to know so far.

2007-01-28 09:21:34 · 3 answers · asked by Basiate 5 in Chemistry

0 ⤊

maths problem including an isosceles trapezium?

a diagram shows a field which a farmer wants to fence.
THIS IS THE KIND OF ARRANGEMENT THE CORNERS ARE IN:
.....D.......C

A..................B

SO IF U JOINED UP THE LETTERS, THEY ARE THE SHAPE ITS IN.

The field is in the shape of an isosceles trapezium in which AB is parallel to DC and AD = BC

AB=80m and CD =60m
The distance between the parallel sides is 30m.

Calculate the length of fencing the farmer will need. (basically the perimeter of the trapezium)

2007-01-28 09:20:56 · 3 answers · asked by clemmie 2 in Mathematics

0 ⤊

Soluble and insoluble compounds of Lead?

1) Select a water soluble compound of lead from the following and name it giving its correct formula:

Pb2+ No3-
Pb2+ CH3COO-

2) Select a water insoluble compound of lead from the following and name it giving its correct formula:

Pb2+ Cl-
Pb2+ Br-
Pb2+ I-
Pb2+ SO4 2-
Pb2+ CO3 2-
Pb2+ S 2-
Pb2+ OH-

2007-01-28 09:20:11 · 2 answers · asked by Anonymous in Chemistry

1 ⤊

[(2000)(0.6)(0.4)]^(1/2) =? calculator batteries out can someone punch this in quick?

2007-01-28 09:19:53 · 4 answers · asked by Olivia 4 in Mathematics

0 ⤊

Is 3x^3+2x^2+1 even, odd, or neither?

2007-01-28 09:19:38 · 6 answers · asked by ford 2 in Mathematics

0 ⤊

Why can radio astronomers observe at any time during the day?

2007-01-28 09:16:14 · 2 answers · asked by Anonymous in Astronomy & Space

2 ⤊

Are ravens & crows the same species of bird? If not, what's the difference?

2007-01-28 09:15:58 · 6 answers · asked by mhb 1 in Zoology

0 ⤊

Homework probs?

Can u show me the steps to complete this problem

it is suppose to be one of those
equations with variebles on each side

5n + 9 = 2n

2007-01-28 09:15:27 · 6 answers · asked by big boy 1 in Mathematics

6 ⤊

I'm building a stud wall?

size of wood required is it
3x2 inches 75x50 mm
4x2 inches 100x50 mm
NOT load bearing

2007-01-28 09:15:06 · 14 answers · asked by dublindutri 1 in Engineering

0 ⤊

maths problem ininequalities?

solve the inequality

(r+1)/3

2007-01-28 09:14:34 · 2 answers · asked by clemmie 2 in Mathematics

1 ⤊

If everything in the universe, at the same time, shrunk to half its size...how would you know?

2007-01-28 09:14:20 · 9 answers · asked by don c 1 in Astronomy & Space

6 ⤊

what is the largest city in Alaska?

2007-01-28 09:13:06 · 7 answers · asked by cindy v 1 in Geography

1 ⤊

The following information shows the colors of cars preferred by 180 customers at Slippery Sam's used car lot.

red:50
white: 60
blue: 40
tan: 20
green: 10.
In a pie chart, how many degrees will the red represent?

2007-01-28 09:12:02 · 3 answers · asked by Olivia 4 in Mathematics

0 ⤊

How have the biologist been able to prove the relation ship of humans to animals science Charles Darwin?

i need specifics this is for a paper (websites please i havent had any luck)

2007-01-28 09:12:00 · 4 answers · asked by leofire94 1 in Biology

1 ⤊

If a Lion and a Black bear fought who would win? Both males in the primes of there life?

2007-01-28 09:09:13 · 9 answers · asked by Anonymous in Zoology

0 ⤊

How to solve: csc(x)^2 -2(csc x) + 4csc(x) = 2?

0< show steps. thanks, for x

2007-01-28 09:07:25 · 3 answers · asked by feelinglikeastar 2 in Mathematics

0 ⤊

Equilibrium Constant?

If Kc is less than 1, which is true of this reaction?
COCl2 <-->CO+Cl2
1. concentration of reactant is much greater than the concentration of products
2. concentration of products is much greater than the concentration of reactants
3. catalyst will increase concentration of products formed
4. at equilibrium, the concentrations of reactants and products are equal.
5. the concentrations of products and reactants are approx. equal.

since Kc<1, the reactants are favored, so doest hat mean that the concentration of reactants is much greater than the conc. of products? (choice1)?

2007-01-28 09:07:10 · 1 answers · asked by Anonymous in Chemistry

0 ⤊

In statistics, the class 22 - 42, the upper class limit would be?

2007-01-28 09:06:49 · 1 answers · asked by Doug 2 in Mathematics

2 ⤊

Does space have an elasticity limit?

Such as when it is bent by matter?

2007-01-28 09:06:38 · 15 answers · asked by Source 4 in Physics

0 ⤊

Beetroot experiment, what control should I use?

I'm carrying out an experiment to investigate the effect of temperature on the release of pigment from beetroot tissue. I've heard of ethanol as a control, would it work? If not, what other control should I use?

2007-01-28 09:05:22 · 1 answers · asked by lykastar 3 in Biology

1 ⤊

TRIG QUESTION: Two observers are 200 feet apart in line with a tree containing a bird's nest?

the angles of elevation to the bird's nest are 30 degrees and 60 deg. How far is each observer from the base of the tree?
We don't just want the answer, but would like to know a step by step on how to do it also. THANK YOU!!! (We won't forget to pick the best answer)

2007-01-28 09:04:22 · 4 answers · asked by TJTB 7 in Mathematics