Science & Mathematics - 21 September 2006

Cobalt(II) sulfate heptahydrate has pink-colored crystals. When heated carefully, it produces cobalt(II) sulfate monohydrate, which has red crystals. If 3.542 g of the heptahydrate yields 2.119 g of the monohydrate, how many grams of the anhydrous cobalt(II) sulfate could be obtained?

2006-09-21 04:55:32 · 3 answers · asked by Anonymous in Chemistry

should we offer sacrifices to appease them?

2006-09-21 04:54:43 · 4 answers · asked by Anonymous in Physics

2006-09-21 04:52:58 · 6 answers · asked by bwhited@sbcglobal.net 1 in Physics

formula for nitric acid is HNO3

2006-09-21 04:51:34 · 3 answers · asked by Anonymous in Chemistry

2006-09-21 04:50:41 · 4 answers · asked by krishna m 2 in Botany

ok you accidentally shrink yourself with a shrink ray. the only way to stop this is to go back in time. you go back to leave yourself a note. after the first note do you have to keep going back and leaving yourself a note?

2006-09-21 04:50:31 · 7 answers · asked by Anonymous in Physics

A pink substance that loses water on heating and changes to a blue-colored compound has the formula CoCl2*6H2O . What is its chemical name?

2006-09-21 04:49:19 · 9 answers · asked by Anonymous in Chemistry

2006-09-21 04:46:17 · 10 answers · asked by Anonymous in Biology

in some text books i read in the standard quadratic equation the roots are infinite if a = 0. But if a = 0 the equation cannot be a quadratic equation. How then such formulae are given?

2006-09-21 04:45:00 · 7 answers · asked by Anonymous in Mathematics

if so how big is it?

2006-09-21 04:44:39 · 2 answers · asked by jlynlove58 1 in Botany

2006-09-21 04:43:26 · 1 answers · asked by goring 6 in Other - Science

2006-09-21 04:41:29 · 4 answers · asked by goring 6 in Physics

area of a figure is fixed , then how can it have irrational value.

eg: area of a cirle or radius 2 units is fixed , but when calculated its value works out to be pi*(2^2) - which is irrational. how??

2006-09-21 04:40:29 · 11 answers · asked by Anonymous in Mathematics

The least integer of a set of consecutives integers is -25. If the sum of this integers is 26, how many integers are in this set?

Thanks

2006-09-21 04:39:04 · 4 answers · asked by Nif 2 in Mathematics

What went BANG, and what was it doing before it went bang, (considering this THEORY is true)

2006-09-21 04:37:23 · 13 answers · asked by Anonymous in Astronomy & Space

2006-09-21 04:34:31 · 3 answers · asked by philax_america 1 in Engineering

well i need help on fractions and how to add divide and subtract them
please help
3 examples:
3 1/7 + 2 2/5
8 1/12 - 4 3/4
2 8/7 divide by 8
please help

2006-09-21 04:32:37 · 19 answers · asked by ???????? 2 in Mathematics

2006-09-21 04:29:16 · 7 answers · asked by julie_moodley 1 in Geography

most electrical conductors are made of metals. however some are are made of others. what are these?

2006-09-21 04:28:37 · 9 answers · asked by raja v 2 in Other - Science

2006-09-21 04:27:11 · 3 answers · asked by tsu 1 in Geography

Atterberg Limit Test

2006-09-21 04:26:51 · 3 answers · asked by Jon L 1 in Engineering

If I am to expect the unexpected, than what happens when the expected happens and I was to busy expecting the unexpected, does now the expected become the unexpected?

2006-09-21 04:25:41 · 10 answers · asked by Big D 3 in Other - Science

2006-09-21 04:25:02 · 4 answers · asked by babyjay 1 in Mathematics

2006-09-21 04:24:23 · 13 answers · asked by chockybikky 3 in Chemistry

Prove:

Tn=e^(-1)*integral[x(subscript n)*e^x]dx is equal to

Tn=1-n*T(subscript n-1)

note: boundary conditions for integral are from 0 to 1

2006-09-21 04:20:38 · 3 answers · asked by Rori S 1 in Mathematics

the most dangerous to humans

2006-09-21 04:19:44 · 37 answers · asked by Christopher L 1 in Biology

2006-09-21 04:19:21 · 4 answers · asked by CIBUMOL B 1 in Engineering

2006-09-21 04:19:19 · 7 answers · asked by Anonymous in Biology

Any part of USA, and how long would it take to drive??? (what route would you take?) to a heavily snowed mountain area? The more detail the better.

2006-09-21 04:17:21 · 9 answers · asked by caseybecker82 2 in Geography

A guest @ my B&B was telling me about seeing this @ a Pet Parade and it was soooo cool! He has his "doggles" to wear...and a water floatation vest...any other ideas?

2006-09-21 04:16:56 · 5 answers · asked by sassydebber 1 in Physics