what will change hydroxyapatite to fluorapatite?
402622
Hydroxyapatite is the material in the enamel of your teeth.  If you brush with a fluoride toothpaste, or get a fluoride rinse at your dentist, the fluoride ion in the rinse/toothpaste replaces some of the hydroxyl groups, converting the hydroxyapatite into fluorapatite.\n\nFluorapatite is a harder material, and more resistant to the acids caused by bacteria in your mouth.  This helps prevent cavities.\n\nHowever, it is important not to overdo the fluoride treatment -- excess fluoride ion in the body reacts with calcium (forming calcium fluoride), which screws up the electrolyte balance in your body, and can kill you.  This is why they recommend spitting out your toothpaste, rather than swallowing it.
839902
Just reconstituted/altered to another chemical.....
560779
You don't need to PCT N.O. Xplode if that's what you are asking.  N.O. Xplode doesn't mess with ph like steroids.  \n\nIf you are asking what to take instead of N.O. Xplode get yourself some Creatine Monohydrate, HMB, and ZMAs.  Nitric Oxide enhancing supplements don't have enough solid, scientific research backing them as safe supplements. Therefore I don't recommend the NO2.
745644
H3PO4 + 3NaOH ----> 3H2O + Na3PO4
487220
Changing the subscripts will all together alterate the chemical.  It will be a completely different chemical.  The coefficients only define how much of that chemical is being used, but changing it won't change what type of chemical it is.
869402
D. Mg, because it will oxidize instead of the iron.
977474
Ca+2 combines with PO4-3in the formula Ca3(PO4)2, calcium biphosphate\n\nCaHPO4 is another compound you may be referring to. Calcium hydrogen phosphate or calcium biphosphate
861717
2 HNO3(aq) + Sr(OH)2(aq) --> Sr(NO3)2 (aq) + 2 H2O\n\n2 H3PO4(aq) + 3 Ba(OH)2(aq) --> Ba3(PO4)2 (cr)* + 6 H2O\n\n* Barium Phosphate will precipiate out of an aqueous solution in this reaction
42181
Cool white phosphors are traditionally a calcium halophosphate (often a fluorophosphate) activated with small amounts of metals.  White is achieved with antimony and manganese, blue with antimony only.
906746
a)silver bromide\nb) tricalcium phosphate\nc)Lithum Hydride\nd)Radium Chloride
844446
AsF3=Arsenic tri fluoride\nAg2CO3=silver carbonate\nFeSO4=Iron[II] Sulfate\nP5O10=Phosphorus Di oxide or penta phosphorus deca oxide\nPb(OH)4=Lead Hydroxide
410572
according to the common ion effect, placing CaF2 in either solution will decrease its solubility.  However when having to choose between the two, it will be most soluble in Ca(NO3)2.  This is because Ksp=[Ca+][F-]^2  The fluorine component is squared making it a bigger factor in lowering the solubility.
713170
K2CrO4 +Pb(NO3)2 ---> PbCrO4(s)  + 2KNO3\n\nNice yellow ppt.
921680
Calcium and Strontium
519971
depends on the mineral
763299
There's two things you're being asked to recognize.\n(1) what kind of reaction is this\n(2) is it going to go forward?\n\nLets deal with them in order.\n\n(1)  What kind of reaction is it.  \n\nI find it very helpful personally to say the names of the molecules out loud.\n\nPhosphoric Acid reacts with Strontium Hydroxide to form what?\n\nWell, the first reactant is an acid, right? The second reactant is a metal hydroxide, like sodium hydroxide, so its a base.  That makes this an acid-base neutralization.  There's no redox chemistry going on here, so the bonds in the polyatomic anion, phosphate (PO4 (3-) ) are going to all remain intact.\n\nRemember, an acid + base neutralization will always form water and a salt.  In this case , your salt would be a combination of the non-hydrogen portions of the acid (PO4) and the metal.  \n\n\n(2)  Will this reaction go forward?\nStrontium hydroxide is moderately soluble in water.  The phosphate salt very nonsoluble.  That means that the product of the displacement will be taken "out" of the solution, driving the reaction towards formation of products.\n\n*********NOTE**********\nMany of your choices aren't charge-balanced molecules.  This may help you tremendously.  I think you may have a typo in your question.\n\n*********NOTE 2*********\nOnce you fixed the choice (d) your typo was taken care of.
861843
Start with the Ca then balance the number of PO4 ions, then balance the Oxygen and the hydrogens should balance themselves out.  Its just trial and error. Monkey with it until it works.