Chemistry

Oxidation/Reduction Questions??? Please help!

1.) In the reaction 2Ca(s) + I2(g) ---> 2CaI2(s), iodine is....a. reduced, b. electrolyzed, c. synthesized, d. oxidized or e. none of these 2.) In the reaction 2Na(s) + Cl2(g) ---> 2NaCl(s), the sodi

Ca+Cl2 ->CaCl2, 1 mole of Ca and 1 mole of Cl2 were present as reactants. Only 106g of CaCl2 is made. % yield

please help-Ca + Cl2 → CaCl2 1 mole each of reactants produce 1 mole of CaCl2. (1 mol CaCl2) x (110.9848 g/mol) = 110.9848 g CaCl2 in theory 106 / 110.9848 = 95.5%

How to balance NaCl + Ni(NO3)

I believe Ni is either 2+ or 3+ So I get: 2NaCl + Ni(NO3)2 -> 2Na(NO3) + NiCl2 Is that right?-YUP thats right! Good job! 2 Na each side CHECK! 2 Cl each side CHECK! 1 Ni each side CHECK! 2 N eac

At a constant temperature in a saturated aqueous salt solution in contact with undissolved salt...

a) addition of a common ion enables more salt to dissolve b) the rate of dissolving exceeds that of crystallization c) the rate of dissolving equals the rate of crystallization of the salt d) the mass

What is phosphorus used for

Can someone please tell me the great uses of phosphorus.. Or send me helpful links if you like...But I would highly appreciate it if the answers were detailed.. Thank you.-Most importantly it is a ver

What are electrons further divided into. pls answer needed.

The electrons is an elementay particle of the lepton family. It cannot be subdevided.

What is the chemical name for propane -- C3H8

Its actually propane, the same as the name commonly used. The root prop- refers to a three-carbon hydrocarbon.The suffix -ane means that the hydrocarbon is saturated (no double or triple bonds).-prop

Estimate the enthalpy change for the combustion of one mole of methane (CH4)

Use the following bond energies to estimate the enthalpy change for the combustion of one mole of methane (CH4). Hint: You should write a balanced equation and Lewis structures. Bonds Bond Energies i

Chemistry help pleaseee!!!!!!!!!!!!!!

This is my sons acount he is homeschooled and needs help with this homework someone please help with any answers so i can help him http://snapserve.net/teacher/141484/SCI401_-_Mod_15,_Test.pdf?110519

CHEMISTRY HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

1.) The Band of Stability refers to the a.) neutron vs electron plot indicating the location of stable nuclei b.) electron vs. proton plot indicating the location of stable nuclei c.) proton vs neutr

Avogadro's number question!

How are the mass of a single atom in an element (in amu), the mass of one mole of atoms of that element, and Avogadros number related? Thanks for the help!-One mole is equal to Avogadro number times t

What is the equilibrium concentration of Pb2+ ion in a solution of PbCl2 that is 0.075 M in chloride ion

PbCl2(s)Pb2+(aq) + 2Cl1-(aq) K = 1.7e-5 Please help-K = [Pb] [Cl]^2 1.7e-5= [Pb] [0.075]^2 [Pb] = 1.7e-5/ (0.005625) Pb+2 = 0.0030 Molar

What would happen if you double the amount of solute in a given amount of a solvent

For example, if I dissolve 12 g of KCl in 400 mL of water, will the boiling point differ from a solution with doubled the amount of KCl (24 g) in 400 mL of water? Please explain, my teacher was not ve

Why is an indicator solution so important to use for titrations 10 points!

need help-Because, you need either a pH meter or an indicator to tell you when you reach the appropriate point. If you have a clear solution of NaOH, and you are trying to titrate it to pH 7 with a c

I do not understand this Chemistry work at all.....please help

I went in to get extra help and still dont get it, and my teacher knows this. It would be appreciated if someone could help with these questions? 5. Convert 9.14 mol of PCI5 to number of molecules 7.