In chemistry we turned pennies silver and then gold using zinc and sodium hydroxide and then holding them over a flame. I know that the pennies didnt really turn into gold, so what actually happened t
Please.
I actually have the answers i just wanna make sure ththeyreight so if i get called on tomorrow in class i wont feel embarassed. (: You actually dont even need to solve them, I just need to see
Uggh...chem test tommorow...i get everything, until i saw these 3 problems...
So the 3 ones are:
a. 15.75 m x 8.45 m
b. 5650 L/ 27 min
c. 6271 m/59.7 s
How do i do these? Work please also...first
Can you walk me through this step-by-step?
This occurs in basic solution:
Zn(s) + NO3^- (aq)--->NH3(aq) + Zn(OH)4^2- (aq)
(The carrot symbol indicates charge).-I recommend balancing the reaction i
If I have 4 M of acetone in 10 mL.is the number of moles, 0.04??
because of the equationA (no moles)=Molarity x Volume
THANK YOU! I just need reassurance I did it right.-That is right.
Hi, my teacher doesnt teach us well. I direly need help I am in regular Chemistry. Can you explain and help me with these problems. I am stressing about the test tomorrow and its not MULTIPLE CHOICE.
HELP! Ideal Gas Law Question for Practice TEST!?
Problem #1
SO3 is produce in enormous quantities each year for use in the synthesis of sulfuric acid.
S(s) + O2(g) = SO2(g)
2SO2(g) + O2(g) = 2SO3
W
Some diamonds appear yellow because they contain nitrogen compounds that absorb purple light of frequency 7.401014 Hz. Calculate the wavelength (in nm and ) of the absorbed light?-To find the waveleng
the answer came out to be 2.5 x 10^5
i need to understand how to arrive to that answer.
thank you in advance-Look at the identities (equalities) for the units.
1 m = 10 dm where dm stands for dec
For IB Chemistry HL, I have to prepare an experiment in which i create 1 gram of a precipitate using an ionic reaction.
However i have NO IDEA what I could use to do that.
Please keep in mind that my
Write the formulas of the compounds produced from the listed ions.
Na+ and Cl-
Na+ and CO3 ^-2
Na+ and OH-
Na+ and SO4 ^-2
Na+ and PO4 ^-3
Na+ and NO3 --The key to making formulas is the drop and swa
A certain weak base has a base ionization equilibrium constant Kb of 5.8 x 10^-6. What concentration of this base would have a pH of 10.92?
Thanks!-since pH + pOH = 14
at a pH of 10.92, the pOH = 3.
The instructions on the container of caustic soda reads that 100 grams of it should be solved in 1 litter of water. But I dont have a scale to measure 100 grams.-100gr(1 tablespoon/15.0015 grams)=6.66
A student weighs 1254 pennies and finds them to have a mass of 3501.4 g. If the pre-1982 pennies weigh on average 3.09 g and the post-1982 pennies weigh 2.51 g, how many of the pennies are pre-1982?-N
Need help with metric conversions, scientific notation, and significant figures!!
Please give me the most simple ways to answer problems for the topics above.-metric conversions:
if you draw out a ch
