how is melting of ice is a physical change
In school, we learned that filtering means to drain out unwanted substances, and there are many steps to apply.
Chemistry is important in medicine because most diseases, injuries, and treatments involve chemicals and chemical processes. By understanding chemistry, we are able to develop drugs that fight disease, develop better nutrition, and develop healthier environments to avoid disease.
water.
Maybe it relies on the improvement of physical health. Chemistry is significant to people's daily life.
H20 is water.
I notice that no one has included theoretical chemistry.
https://en.wikipedia.org/wiki/Theoretical_chemistry
The woman who worked with the African Grey Parrot was trained as a theoretical chemist. ( memory escapes me as to her name, but the bird's name was Alex )
Organic chemistry could be the most important one, I think. But synthetic chemistry seems to show increasing importance.
25.0 g TiO2 (1 mol TiO2/236.4 g)(2 mol Br2/3 mol TiO2)(159.8 g/1 mol Br2)
= 11.27 grams theoretical yield
======
4.85/11.27 * 100
= 43% yield
======
Wrought iron was customarily purified at a moderately low temperature in the strong state to deliver a spongey mass of metal called a blossom from which the contaminations were driven off as fluid slag by pounding, thus the expression "created" ie "worked" iron. Created iron is exceptionally unadulterated, with a carbon substance of under 1%, … Read more
Mostly calcium hydroxide, Ca(OH)2, but some potassium and sodium hydroxide also, plus water.
Used as an anesthetic and a carbon dioxide filter.
Fascinating.
Hoover & Strong has a chat function on its, but you have already contacted them.
http://www.answers.com/Q/How_much_does_mercury_cost_per_kilogram does not contain a price, but it does nicely summarize the "issues" surrounding the possession of liquid mercry.
You might try a search in the town where your niece lives. Look for "hazardous waste" or something like … Read more
NaOH + NH4Cl --> NaCl + NH4OH
Rock salt most definitely. You can also use urea to melt ice.
2FeCl3 + 3Na2CO3 --> Fe2(CO3)3 + 6NaCl
Pretty basic really but here is all the info you will need.
Litmus Paper - Encyclopedia.com
www.encyclopedia.com/topic/Litmus_Paper.aspx
A molecule is an actual piece of something like steel. While it takes a combination of atoms to make a molecule. Different atoms like carbon and ferrite are in a molecule of steel
A molecule is a particular configuration of atoms. This can be both a molecular formula, which is quite meaningless compared to a 3d model of the molecule. An atom is made up of electrons, protons, and neutrons, split between an electron cloud and a nucleus.
Particles? I assume you mean molecules/atoms per mole, or atoms per species. Anyway..., Ba3(PO4)2
15.5 g Ba3(PO4)2 (1 mol Ba3(PO4)2/601.8 g)(6.022 X 10^23/1 mol Ba3(PO4)2)
= 1.6 X 10^22 "particles" of barium phosphate in 15.5 g Ba3(PO4)2
======Now, to find, say, atoms of barium in Ba3(PO4)2
15.5 g Ba3(PO4)2 (1 mole Ba3(PO4)2/601.8 g)(3 mole Ba/1 mol Ba3(PO4)2)(6.022 X 10^23/1 … Read more
It is an ionic compound.
Table salt = NaCl
Dissolved.
Na^+
Surrounded by molecules of water, oxygen end of water, as water is slightly polar and the oxygen end of the water molecule is slightly negative in charge.
Cl^-
Also surrounded by the polar water molecule, but the hydrogen end(s), as the hydrogen end(s) are slightly positive in charge.
Baking … Read more
