Number of results: 209
chemisrty
5
Sunday, March 22, 2009 at 9:42pm by Losr
chemisrty
L x M = L x M
Sunday, December 12, 2010 at 10:12pm by DrBob222
chemisrty
What else is in the mixture?
Sunday, April 14, 2013 at 2:56am by DrBob222
Chemisrty
kjhlkjh
Tuesday, February 22, 2011 at 9:56pm by Anonymous
chemisrty
ertywgwgh
Monday, November 16, 2009 at 12:28pm by Anonymous
ap chemisrty
xcvvc
Thursday, January 27, 2011 at 9:15pm by Anonymous
Chemisrty
how do i solve for XXXX
Monday, February 22, 2010 at 8:38pm by Jenna
Chemisrty
formula for silicon dioxide?
Monday, September 8, 2008 at 12:52am by Me
college Chemisrty
what's the 25.2??? is it a mass?
Monday, May 13, 2013 at 2:18am by bonjo
CHEMISRTY
See your other post.
Friday, May 3, 2013 at 6:28pm by DrBob222
chemisrty
853 WHAT 1.50 WHAT 7.00 WHAT
Wednesday, October 19, 2011 at 8:39pm by DrBob222
chemisrty
For determining what? molar mass? No.
Wednesday, April 27, 2011 at 8:58pm by DrBob222
Chemisrty
Still doesn't change my overall answer.
Sunday, March 17, 2013 at 11:39am by Devron
Chemisrty
I am having trouble balancing this reaction!
Saturday, January 29, 2011 at 1:12pm by Anonymous
ap chemisrty
Can't you use the Arrhenius equation?
Thursday, January 27, 2011 at 9:15pm by DrBob222
chemisrty
q = mass x specific heat x delta T.
Tuesday, June 29, 2010 at 11:17pm by DrBob222
Chemisrty
moles = grams/molar mass.
Monday, May 10, 2010 at 10:47pm by DrBob222
Chemisrty
algebra xxx= .1*molmassNa3PO4*.25
Monday, February 22, 2010 at 8:38pm by bobpursley
chemisrty
Ag+(aq) + e- ----> help me finish it.
Monday, May 12, 2008 at 12:05pm by becci
Chemisrty
None. Mg will not displace Li^+ from LiCl.
Saturday, May 5, 2012 at 1:02pm by DrBob222
chemisrty
q = mass Ag x specific heat x 12
Tuesday, March 20, 2012 at 4:54pm by DrBob222
chemisrty
Read about hydrogen bonding. That's the secret.
Monday, January 16, 2012 at 4:44pm by DrBob222
chemisrty
Doesn't that depend upon how you define an acid and a base?
Sunday, April 17, 2011 at 3:57pm by DrBob222
chemisrty - ICE CHART DEPOSTION
See your post above.
Thursday, November 22, 2012 at 1:06pm by DrBob222
Chemisrty
can someone please explain this question more in detail thank you
Tuesday, February 23, 2010 at 1:33am by Tersa
Chemisrty
How can I test for catalase in a carrot using an experiment?
Tuesday, November 20, 2007 at 12:15pm by Christy Fultz
chemisrty
I forgot. The sulfur must be rubbed on the ankles, also.
Tuesday, October 23, 2007 at 6:32pm by DrBob222
chemisrty
what is sulfur and what are the uses please make it simple as possible:D
Tuesday, October 23, 2007 at 6:32pm by joe
Chemisrty
How many grams of KClO3 must react to form 42.0 mL?
Thursday, April 4, 2013 at 5:24pm by Mia
College Chemisrty
There are 140 g of H2SO4 in 400 mL of a solution. What is the molarity?
Thursday, October 27, 2011 at 7:41pm by Jane
chemisrty ASAP
name and give the formula for six diatomic elements.
Thursday, October 6, 2011 at 8:07pm by miguel
chemisrty
could freezing point depression be used for substances not soluble in water?
Wednesday, April 27, 2011 at 8:58pm by Anonymous
Chemisrty
increases. the left side of the chart is the easy to remove electrons.
Tuesday, January 11, 2011 at 9:49pm by bobpursley
Chemisrty 1
Probably not to 100% certainty BUT the density can narrow the possibilities tremendously.
Monday, October 4, 2010 at 4:54pm by DrBob222
Chemisrty
.1M=XXX grams/molmassNa3PO4*.25 solve for xxxx
Monday, February 22, 2010 at 8:38pm by bobpursley
chemisrty
Why do gases deviate from ideal behavior at very high pressures?
Friday, September 26, 2008 at 11:03am by mike
chemisrty
Is this percent w/v? Use the dilution formula. c1v1 = c2v2 c = concn v = volume.
Friday, April 26, 2013 at 1:45am by DrBob222
Chemisrty
What volume of oxygen, measured at STP, can be prepared by heating 2.16g HgO?
Wednesday, April 10, 2013 at 11:10am by Sam
chemisrty
how many grams of cai2 are present in 3.28 moles? Can someone explaine how to do this question as well?
Thursday, January 24, 2013 at 12:36am by omar
chemisrty
calculate the delta H when 0.150 mmol of AgCl dissolves in water?
Sunday, September 9, 2012 at 6:00pm by samadhi kandekumbura
chemisrty
what is the final concentration of a solution if 100mL of water is added to a 25mL of 5.0 M NaCl?
Wednesday, November 16, 2011 at 9:02pm by mandy
chemisrty
calculate the percent by mass of carbon(c) in the amino acid arginine,C6H16N4.
Sunday, February 27, 2011 at 5:09pm by michelle
Chemisrty
What is the pH of a 0.20 M solution of NH4Cl? [Kb(NH3) = 1.8 × 10−5]
Tuesday, February 22, 2011 at 9:56pm by Peter
Chemisrty
what mass of sodium phosphate is required to make 250mL of 0.10mol/L solution?
Monday, February 22, 2010 at 8:38pm by Jenna
CHEMISRTY
Calculate the energy required to raise the temperature of 160.0 g Ag from 273 K to 295 K.
Sunday, April 21, 2013 at 10:45pm by Tonya
chemisrty
how many ml of a .1M HCl are required to react completely with 1 gm mixture of Na2CO3 ?
Sunday, April 14, 2013 at 2:56am by swati
Chemisrty
the equation is supposed to say: CS2 + 3O2 -> CO2 + 2SO2 * O2 not 3CO2
Sunday, March 17, 2013 at 11:39am by M
chemisrty
What is ΔGo at 1000 oC for the following reaction? CaCO3 (s) CaO (s) + CO2 (g)
Tuesday, November 27, 2012 at 4:37pm by laquisha
Chemisrty
How many L of carbon dioxide gas will be produced from the decomposition of 5.0g of sodium hydrogen cardonate?
Saturday, May 5, 2012 at 12:55pm by Elizabeth
chemisrty
5.0M x (25/125) = ?? and this assume that the volumes are additive. Otherwise the problem can't be solved.
Wednesday, November 16, 2011 at 9:02pm by DrBob222
chemisrty
I'm sorry but I can't envision the activity. And I don't know what you removed from the paper bag, in what order, and how they were clipped together.
Monday, November 16, 2009 at 12:28pm by DrBob222
chemisrty
how can you calculate the net charge of an ion if you know the number of protons, neutrons, and electrons it contains?
Wednesday, November 4, 2009 at 11:23pm by rica
chemisrty
volumeof oxygen produced if 130.0g of water is completely decomposed at STP?
Thursday, February 9, 2012 at 4:02pm by mike john
chemisrty
Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of MgSO3 and HI are mixed
Tuesday, April 12, 2011 at 2:53pm by Anonymous
Chemisrty
I need help on what exactly to put on 10-12 slides on a pwoerpoint of anders celsius?? (for 2m)
Sunday, March 27, 2011 at 7:36pm by Tiara
chemisrty
What is the ratio of the average velocity of hydrogen molecules to that of neon atoms at the same temperature and pressure?
Thursday, May 13, 2010 at 6:38pm by someone
college Chemisrty
at what kelvin temperature will 25.2 of xe occupy a volume of 645 L at pressure of 732 torr?
Monday, May 13, 2013 at 2:18am by judy
chemisrty
I would caution you that lower case letters don't tell me much. grams = mols x molar mass.
Thursday, January 24, 2013 at 12:36am by DrBob222
chemisrty
It appears for each mole of chlorine, you get twice that number of moles of sodium chloride. What is the mass of 7.2moles of NaCl?
Friday, July 15, 2011 at 2:58pm by bobpursley
Chemisrty
calculate the final Celsuis Temp when 5.0 L of Flourine gas at 50 is cooled to give a volume of 3.75?
Thursday, March 24, 2011 at 1:33pm by Dee
Chemisrty
The clue is in the name silicon (Si) dioxide (two atoms of oxygen O2) SiO2
Monday, September 8, 2008 at 12:52am by Dr Russ
Chemisrty
How many kilojoules of heat are absorbed when 40.7g of MgO(s) is decomposed into Mg(s) and O2 (g) at constant pressure?
Sunday, March 10, 2013 at 10:02pm by Anonymous
Chemisrty
as you move left to right across period 3 from mg to cl, the energy needed to remove an electron from the atom does what?
Tuesday, January 11, 2011 at 9:49pm by Kathy
chemisrty
what voule of 12M hydrochloric acid must be diluted with distilled water to prepare 5.0L of 0.10M HCl?
Sunday, December 12, 2010 at 10:12pm by Cassie
CHEMISRTY
What's the product? What's the reaction? You need to post the entire problem and not just a part of it. My crystal ball is fuzzy tonight.
Sunday, February 28, 2010 at 5:01pm by DrBob222
chemisrty
Under what conditions of temperature and pressure do you think that the gas laws would work best? Please be specific
Tuesday, September 29, 2009 at 1:29am by Anonymous
chemisrty - ICE CHART DEPOSTION
How do i find pH of HNO2 i just need a formula to follow cause i cant figure out the equation.
Thursday, November 22, 2012 at 1:17pm by Tara
Chemisrty
When 7.76 grams of magnesium bicarbonate are mixed with 300. mL of 0.10 M hydrocyanic acid, how many liters of gas are evolved at STP?
Saturday, January 29, 2011 at 1:12pm by Mary
Chemisrty
Calculate the work done when 60.0 g of tin dissolves in excess acid at 1.00 atm and 20°C. Assume ideal gas behavior.
Thursday, October 14, 2010 at 12:49pm by Amber
CHEMISRTY
q = mass Ag x specific heat Ag x (Tfinal-Tinitial)
Sunday, April 21, 2013 at 10:45pm by DrBob222
Chemisrty
You have P, V, and T in the same problem. Boyle's Law is P and V. Charles' Law is V and T.
Wednesday, October 19, 2011 at 3:18pm by DrBob222
cHEMISRTY 101
(A) What is the mass of 150 mL of a liquid with a density of 1.4 g/mL
Thursday, February 3, 2011 at 6:26pm by Anonymous
Chemisrty
okay so if the molar mass of Na3PO4 is 164. a multiply that by 0.1 and then multiply that by o.25 ??
Monday, February 22, 2010 at 8:38pm by Jenna
chemisrty
what is the balance equation of CH3COOH(aq)+NH3(aq)
Monday, April 18, 2011 at 12:18am by yr
Chemisrty
Calculate the moles of aluminum ions present in 250.0 g aluminum oxide
Monday, May 10, 2010 at 10:47pm by Sam
college chemisrty
You don't have any units. Please repost the entire question but use units.
Wednesday, July 7, 2010 at 7:20pm by DrBob222
cHEMISRTY 101
150 * 1.4 grams or 210 grams
Thursday, February 3, 2011 at 6:26pm by Damon
chemistry
Thank you so with those corrections my new calculations would be .0090*100.05 = .90045g Hopefully this time it is right. Obviously I am not chemisrty gifted.
Friday, January 29, 2010 at 6:20pm by Krissy
chemisrty
A 853 solution is diluted to a volume of 1.50 and a concentration of 7.00 . What was the initial concentration? PLEASE HELP
Wednesday, October 19, 2011 at 8:39pm by lola
Chemisrty
This is a 1:1 reaction between acid and base. For such a reaction, mL1 x M1 = mL2 x M2
Sunday, October 9, 2011 at 3:33pm by DrBob222
Chemisrty
Calculate the amount of solute needed to make the solution .50kg of a 18% (m/m) KOH solution
Wednesday, May 18, 2011 at 3:07pm by Monster
Chemisrty
How many grams of lithium metal would be produced if 0.500g of magnesium was added to a solution of lithium chloride?
Saturday, May 5, 2012 at 1:02pm by Elizabeth
chemisrty
%C = (mass C/molar mass)*100 = ??
Sunday, February 27, 2011 at 5:09pm by DrBob222
chemisrty
Ag^+(aq) + e ==> Ag(s)
Monday, May 12, 2008 at 12:05pm by DrBob222
Chemisrty 1
If ou knew the density of an unknown metal, do you think you could accurately determine the identity of the metal based on that property?
Monday, October 4, 2010 at 4:54pm by Mariah
CHEMISRTY
How many liters of H2O will form when excess O2 reacts with 100 liters of H2 according to the gas phase reaction:
Friday, May 3, 2013 at 6:28pm by KRISTY
chemisrty
what is the concentration of [H+} in molars, millimolars, and micromolars for a solution of pH 5? In case you need this information: milli= 10^-3 micro=10^-6 Thank you.
Saturday, February 2, 2008 at 12:47pm by alex
chemisrty
how many liters of oxygen can be produced at stp from the decomp. of .25 liters of 3M H2O2 ACCORDING TO THE REACTION 2H2O-2 H2O+O2
Saturday, November 24, 2012 at 6:59pm by chris
Chemisrty
How many milliliters of a 2.0M NaOH solution are needed to neutralize 20.0 ml of a 2.5M CH3COOH solution? How do I begin to figure this out?
Sunday, October 9, 2011 at 3:33pm by Shelly
chemisrty
put in decreasing freezing point 0.10m Na3PO4,0.35m NaCl,0.20 m MgCl2, 0.15 m C6H12O6,0.15 m CH3COOH
Sunday, June 27, 2010 at 11:25pm by Anonymous
Chemisrty Lab
It looks ok to me. Did you use google to make the conversions? If so, you need to know how to do them if you are asked to show your work and you don't have google in your hip pocket.
Tuesday, September 11, 2007 at 10:30pm by DrBob222
chemisrty
what volume of hydrogen gas at STP can be produced by reacting 15.0 grams of uluminum with sulfuric acid? the equation is: 2Al+ 3H2SO4---> Al2(SO4)3+ 3H2
Thursday, March 29, 2012 at 6:49am by kim
chemistry
i am a sophmore but i reallyy really suck at chemisrty i am passing with a c luckily but the teacher i have is really bad but thanxs soo much DrBob222
Sunday, May 11, 2008 at 9:54pm by amethyst
chemisrty
How many moles are in 5.56 g KOH. moles = grams/molar mass Then moles HNO3 = M x L.
Sunday, November 21, 2010 at 5:55pm by DrBob222
college chemisrty
no units again. That's like going to the store and asking the price of a gallon of milk. The clerk tells you 2. What does that mean? Absolutely nothing. It could be 2 mils, 2 cents, 2 dollars, 2 euros, 2 lira, what?
Wednesday, July 7, 2010 at 7:20pm by DrBob222
chemisrty
Is this the stuctual formula for hydolosis of tocainide CH3 NHCOCH^2N(C^2H^3)^2 CH3 WITH THE HEXAGON LINKING THE 2 X CH3
Thursday, March 15, 2007 at 4:08pm by bex
chemisrty
The molar heat capacity of silver is 25.35j/mol C . How much energy would it take to raise the temperature of 9.30 grams of silver by 12.0 C?
Tuesday, March 20, 2012 at 4:54pm by help
chemisrty
a 445 g sample of ice at -58 degrees celcious untill its temperature reaches -29 degrees celcius. find the change in heat content system
Sunday, March 22, 2009 at 9:42pm by daniel
CHEMISRTY
HOW MANY GRAMS OF MAGNESIUM ARE REQUIRED TO PRODUCE 2.154 GRAMS OF PRODUCT? STEP BY STEP EXPLAINATION
Sunday, February 28, 2010 at 5:01pm by Donna
chemisrty
If 55.0 grams of KCIO3 is decomposed by the following equation, how many grams of oxygen can be produced? 2 KCIO3 > 2 KCL + 3 O2
Tuesday, June 29, 2010 at 11:21pm by gary
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