Open Question: What are the physical and chemical properties of flour?
Open Question: Chemical Properties of Calcium Carbonate?
Open Question: Investigating Chemical Equilibrium:?
Alicia Member since:September 19, 2010Total points:46 (Level 1)Some inexpensive humidity detection systems consist of a piece of paper saturated with Na2CoCl4 that changes color in dry or humid air. What color is the piece of paper in dry air? What color is the piece of paper in humid air? Justify your answer with an explanation.Answer QuestionBe the first to answer this question.
Open Question: Chemical bonding between boron trifluoride and sodium fluoride.?
sunbeams Member since:April 16, 2011Total points:100 (Level 1)BF3 is a pungent colourless gas (b.p. -101 degree celcius). NaF is a solid (m.p. 992 degree celcius). When BF3 reacts with NaF, it forms a compound NaBF4.a) Describe, in terms of bonding, how NaBF4 is formed.
b) Suggest, with reasons, 2 properties of NaBF4.Answer Question
Open Question: I need an idea of a chemical reaction to use in a Rube Goldberg machine?
A few penny-auctions that ended on http://www.powerhousebids.net in the time it took you to type that question:
Jesus -- Nikon Coolpix 12.1 MP Digital Camera robbed for as little as $18.45
Dennis -- Xbox 360 Console 4GB Kinect Bundle robbed for as little as $21.89
Angela -- Samsung 55" 3D 1080p LED HDTV for just $5.89
Jimmy -- Nikon Coolpix 12.1 MP Digital Camera taken for $12.46
Douglas -- LG 42" 1080p LED Plus HDTV ending bid of just $15.68
Register for FREE! BBB Accredited Business! The Best discount merchandise from certified sellers. See for yourself...
Open Question: is there a way to count polar bonds given chemical formula only?
i mean without drawing a lewis structure
Sorry, I could not read the content fromt this page.
Open Question: Chemical Thermodynamics?
For a particular reaction, ?H = -32 kJ and ?S = -97 J/K. Assume that ?H and ?S do not vary with temperature.
Questions:
1.) At what temperature will the reaction have ?G = 0? (Answer In K.)
2.) If T is increased from that in part A, will the reaction be spontaneous or nonspontaneous?
Any help would be great! Also show work on how you got the answer to #1 so I know how to do it for other problems, thanks! :)
*****
Open Question: Hi I need help with obtaining the original concentration of a chemical please!?
The amount used was 50 microlitres and the original dilution was a 1 in 500.
What was the original concentration of the chemical?
Thanks so much for any help!!
Open Question: As a gasoline engine is running, an amount of gasoline containing 15,000 J of chemical potential energy?
cindy Member since:February 20, 2011Total points:40 (Level 1)As a gasoline engine is running, an amount of gasoline containing 15,000 J of chemical potential energy is burned in 1.0 s. During that second, the engine does 3100 J of work. (a) What is the engine’s efficiency? (b) The burning gasoline has a temperature of about 2500 K. The waste heat from the engine flows into air at about 290 K. What is the Carnot efficiency of a heat engine operating between these two temperatures?Answer QuestionBe the first to answer this question.
Open Question: Is the chemical equation balanced?
2 S 2
6 O 6
Open Question: Seeing My Chemical Romance april 6th?
Emily Member since:December 10, 2009Total points:400 (Level 2)I was just wondering if it would be better to stand near the front or the middle? Also what songs are they going to sing? do they sing a lot of songs from the black parade and the past albums? how are they live?Answer Question
by Matteo Chirco Member since:January 14, 2011Total points:1 (Level 1)
Open Question: How do you Balance chemical equation?
Open Question: a result of a chemical reaction between pollutants and water and is one cause of chemical weathering of rock?
Open Question: Chemical test to confirm the presence of -OH group in ethanol?
Thanks
Sorry, I could not read the content fromt this page.
Open Question: Balanced chemical equation?
Open Question: What is the chemical formula for stainless steel?
When nickel is added, for instance, the austenite structure of iron is stabilized. This crystal structure makes such steels virtually non-magnetic and less brittle at low temperatures.
In fact, there are multiple grades of stainless steel, and each of them varies in what various metals are present in small amounts.
Open Question: Finding pOH in a Chemical Reaction?
Do I use this equation?
NaCN(aq) + H2O(l) ? [Na+](aq) + [OH-](aq) + [H+](aq) + [CN-](aq)
? Kb/Kw = [Na+][CN-]/[NaCN] = x²/(0.0827 - x) = 4.49*10^4
---? x = 0.0826998 M = [Na+] = [CN-]
But then how would I get a pOH out of that? adding NaCN doesn't directly affect the concentration... or am I supposed to look up the pH of [CN-] on a table or something? I'm sorry, I really have no idea how to solve this.
