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February 12, 2016

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

CHEMISTRY!!
For the diprotic weak acid H2A, Ka1 = 2.0 × 10^-6 and Ka2 = 6.7 × 10^-9. What is the pH of a 0.0800 M solution of H2A? What are the equilibrium concentrations of H2A and A2– in this solution?
Monday, November 2, 2015 by GARRETT

Chemistry
How much carbon dioxide is produced upon the complete combustion of 17.3L of propane (approximately content of one 5-gal tank)? Assume that the density of the liquid propane in the tank is 0.621 g/mL. Can you please list the steps! I am really confused! I tried many ways but I...
Monday, November 2, 2015 by Maira

chemistry
if 40g of KNO3 is dissolved in 100ml water at 25 C WHAT WILL FINAL TEMP BE? SHOW ALL WORK
Monday, November 2, 2015 by sara

Chemistry
H3PO4(aq) + 3 KOH(aq) → K3PO4(aq) + 3 H2O(l) How many grams of potassium hydroxide are required to completely neutralize 3.23 grams of phosphoric acid?
Monday, November 2, 2015 by ...

Chemistry
Determine the number of grams of water in 7.00 g of copper(II) sulfate pentahydrate.
Monday, November 2, 2015 by Liz

Chemistry
A hypothetical covalent molecule, X–Y, has a dipole moment of 1.62 D and a bond length of 179 pm. Calculate the partial charge on a pole of this molecule in terms of e (where e is the charge on an electron).
Monday, November 2, 2015 by Jordann

Chemistry (Help)
For the chemical reaction, sodium hydroxide + copper (II) chloride = "robin's egg blue" precipitate, do the following: write the balanced molecular, balanced total ionic, and balanced net ionic equations; determine the Limiting Reactant (LR) for each chemical ...
Monday, November 2, 2015 by Anonymous

Chemistry (Check and Help)
Upon the combustion of propane, C3H8, 150. g of propane was reacted with excess oxygen gas. A. Determine the limiting reactant if the water is the product of interest. B. Determine the number of grams of water produced. C. Calculate the number of grams of water obtained in the...
Monday, November 2, 2015 by Anonymous

Chemistry (Check and Help)
Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount in grams of excess reagent. 8.75 g of mercury (II) nitrate solution is mixed with 9.83 g sodium iodide solution (ppt). Hg(NO3)2(aq) + 2NaI(aq) --> ...
Monday, November 2, 2015 by Anonymous

Chemistry (Check and Help)
Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount in grams of excess reagent. 6.95 moles of glucose C6H12O6(s) is combusted with 7.54 moles of O2 gas (both products!) C6H12O6(s) + 6O2(g) --> 6CO2(g...
Monday, November 2, 2015 by Anonymous

Chemistry (Check)
Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount in grams of excess reagent. Calcium nitrate is decomposed with heat to give calcium nitrite and oxygen gas. Start with 15.99g of calcium nitrate. Ca(NO3...
Monday, November 2, 2015 by Anonymous

Chemistry
Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount of grams of excess reagent. Chromium metal is heated with oxygen to give chromium (III) oxide. Start with 38.5 moles chromium metal and unlimited oxygen...
Monday, November 2, 2015 by Anonymous

Chemistry
Calculate the work, in kJ, done when 126 g of tin dissolves in excess acid at 25.0˚C and 1.00 atm. Assume Ideal Gas behavior. Sn(s) + 2 H+(aq) → Sn2+(aq) + H2(g) I basically need to know how to find the change in volume since work=-pressure*volume change and I have ...
Monday, November 2, 2015 by Carol

Chemistry
How much heat (in kilojoules) is released on reaction of 5.30 g of Al?
Sunday, November 1, 2015 by Donny

Chemistry
Pb + S yield FeS
Sunday, November 1, 2015 by D

Chemistry
3.90g sample of Al with an unknown initial temperature is dropped into 10 mg of water at 22.6 degrees Celsius. What will teh change in temperature be of the Al if its final temperature is 28.6 degrees Celsius?
Sunday, November 1, 2015 by Connor

cheMistry
a) Silver iodide(s) is formed by the following reaction: Ag (aq) + I (aq) --> AgI (s) The Ksp for AgI = 1.8 x 10^-10 Describe, using the chemical reaction, the mathematical formula for these ions. Assuming these ion concentrations are equal, what would the molarity be for ...
Sunday, November 1, 2015 by hank

Chemistry
Ca(OH)2+Na2CO3> 2NaOH + CaCO3 50g hydroxide and 50g sodium carbonate are reacted. How many grams sodium hydroxide will be made?
Sunday, November 1, 2015 by Ashley

Chemistry
Suppose that 120 g of ethanol at 24◦C is mixed with 275 g of ethanol at 81◦C at constant atmospheric pressure in a thermally insulated vessel. What is the ∆Ssys for the process? The specific heat capacity for ethanol is 2.42J/g K. Answer in units of J/K. Can ...
Sunday, November 1, 2015 by Alexis

Chemistry
The heat of neutralization of HCl(aq) and NaOH(aq) is -55.90 kJ/mol of water produced. If 50.00 mL of 1.16 M NaOH at 25.15 ºC is added to 25.00 mL of 1.79 M HCl at 26.34 ºC in a plastic-foam cup calorimeter, what willthe solution temperature be immediately after the ...
Sunday, November 1, 2015 by Alexis

Chemistry
How do you find the Ka1 and Ka2 of oxalic acid when it is in a solution that is 1.05 M H2C2O4 and has a pH of 0.67. [C2O4^2-] = 5.3x10^-5 M. I have tried using an ICE table for both reactions, as oxalic acid is a diprotic acid, but I am having trouble knowing where to put ...
Sunday, November 1, 2015 by Erika

Chemistry
An experiment requires 0.34 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.34 M base?
Sunday, November 1, 2015 by Liz

chemistry
How much does the molar enthalpy change when 147g of water cools from 90°C to 17.0°C? The molar heat capacity for water is 75.3 j/k•mol
Sunday, November 1, 2015 by Gino

Chemistry
For the chemical reaction, sodium hydroxide + copper (II) chloride = "robin's egg blue" precipitate, do the following: write the balanced molecular, balanced total ionic, and balanced net ionic equations; determine the Limiting Reactant (LR) for each chemical ...
Sunday, November 1, 2015 by Anonymous

Chemistry
Dissolving calcium hydroxide (∆Hsoln = -16.2 KJ/mol) in water is an exothermic process. How much lithium hydroxide (∆Hsoln = -23.6 KJ/mol) is needed to deliver the same amount of heat as 15.00 g of Ca(OH)2? Hello everyone, thank you for taking a look at my question...
Sunday, November 1, 2015 by Ka_Chin

Burnhamthrop Chemistry
initially 0.25 mol of water vapour and 0.20 mor of carbon monoxide are place in a 1.00 L reaction vessel. at equilibrium spectroscopic evidence shows that 0.10 mol of corbon dioxide is present calculate K for the reaction
Saturday, October 31, 2015 by Omar

chemistry
0.5 mol CCl4 is introduced into a 10.0L flask.what fraction of the total volume of the flask is occupied by CCl4 molecules?
Saturday, October 31, 2015 by faiz

Chemistry
A 0.1818 g sample of sodium oxalate required 28.12 ml of a potassium permanganate solution to reach the endpoint (assume the reaction was carried out in excess acid). A 5.000 g sample of tin (II) sulfate containing potassium sulfate as an impurity was found to require 35.00 ml...
Saturday, October 31, 2015 by Anonymous

Chemistry
A ball bearing at 22.0 Celsius is dropped into a cup containing 250.0 g of water at 20.0 Celsius. The water and ball bearing come to a temperature of 30.0 Celsius. What is the heat capacity of the ball bearing in J/Celsius? How do I do this kind of question? I don't expect...
Saturday, October 31, 2015 by Aurora

Chemistry
A weather balloon is inflated to a volume of 29.9 L at a pressure of 755 mmHg and a temperature of 33.0 ∘C. The balloon rises in the atmosphere to an altitude where the pressure is 385 mmHg and the temperature is -16.2 ∘C. Assuming the balloon can freely expand, ...
Saturday, October 31, 2015 by Anonymous

Chemistry
I have to prepare 1ppm of Fe+2 solution in 1litre. How many grams of ferrous ammonium sulphate will be dissolved in 1litre to make above solution.. plzz guide me
Saturday, October 31, 2015 by Syed

chemistry
How many kilojoules are absorbed when 318 g of Ca(OH)2 reacts?
Saturday, October 31, 2015 by kiersten

chemistry
pls balance the equation AL3C4+H2O-CH4+AL(OH)3
Friday, October 30, 2015 by seun

Chemistry
Balance the equation: NO2- (aq) + Al (s) --> NH3 (g) + AlO2- (aq) (basic solution) ** please note the "2-" on the NO2- and AlO2- are not subscripts, they are the charges. I missed a few classes in Chemistry and find myself lost. I have tried to learn these ...
Friday, October 30, 2015 by Nikki

Chemistry
An unknown diatomic gas has a density of 1.428 g/L at STP. What is the identity of the gas? (Enter the formula of the gas. Omit states-of-matter from your answer.)
Friday, October 30, 2015 by WhiteRabbit

Chemistry
Find number of hydrogen atoms: 1 mol of NH3 1 mol of N2H4 4 mol of NH3 3 mol of N2H4
Thursday, October 29, 2015 by Anonymous

Chemistry
How many atoms are there in: A. 1 mole of Si? B. 2 mole of Si? C. 0.5 moles of Si? D. 0.10 moles of Si? I'm having trouble setting these up.
Thursday, October 29, 2015 by Anonymous

Chemistry
Calculate the mass of Fe(OH)3 s) produced by mixing 50.0 mL of 0.153 M KOH (aq) and 25.0 mL of 0.255 M Fe(NO3)3 (aq), and the number of moles of the excess reactant remaining in solution. I got 0.00383 mol Fe(NO3)3 remaining. I don't know how to obtain the mass of Fe(OH)3...
Thursday, October 29, 2015 by Tiffany

chemistry (helppp me)
what is the bond order for BeF2? according to the lewis structure? ....according to MO diagrams its 0. 16 valence e-
Thursday, October 29, 2015 by Anonymous

CHEMISTRY! HELP
1. Given the following set of quantum numbers: 3py -1/2. A chemistry student claims that this represents a peanut-shaped electron. Is she correct? Answer (Am I correct? If not, how?) : She is correct because 3py is a peanut shape with -1/2 being the spin. 2. A chemistry ...
Thursday, October 29, 2015 by Sophia

Chemistry
When Zn(OH)2(s) was added to 1.00 L of a basic solution, 1.24×10−2 mol of the solid dissolved. What is the concentration of OH− in the final solution?
Thursday, October 29, 2015 by Amber

chemistry
if there are 8 homo orbitals, how do i know how many lumo orbitals there are?
Thursday, October 29, 2015 by Anonymous

chemistry
what is the bond order for BeF2?
Thursday, October 29, 2015 by Anonymous

Chemistry
What is the mass of an atom's nucleus called?
Thursday, October 29, 2015 by Anonymous

Chemistry
Does adding a proton to lithium-7 make it a positively charged ion?
Thursday, October 29, 2015 by Anonymous

mathematics
in a class of 60 students, the number of students who passed biology is 6 more the number of student who passed chemistry. Every student passed at least 1 subject and 8 passed both subject. How many passed chemistry
Thursday, October 29, 2015 by conan

Chemistry
Sulfur dioxide SO2 is released in the combustion of coal. Scrubbers use aqueous slurries of Ca(OH)2 to remove the sulfur dioxide from the flue gases. Write a balanced equation for this reaction and calculate delta So at 298 K (So for CaSO3(s) = 101.4 J/{mol*K}). include the ...
Thursday, October 29, 2015 by Mark

Chemistry
HOW MANY MOLES OF solute are present in each of the following 50.0mL OF1.20M HNO3
Thursday, October 29, 2015 by Felicia

Chemistry
Methanol, a major industrial feedstock, is made by several catalyzed reactions, such as CO(g) + 2H2(g) ----> CH3OH (l) One concern about using CH3OH as an auto fuel is its oxidation in air to yield formaldehyde, CH2OH(g) which poses a health hazard. Calculate ÄG o at ...
Thursday, October 29, 2015 by Henry

Chemistry
The equilibrium constant for the reaction 2SO2 + O2 <=> 2SO3(all are gases) at a certain const temperature is 846.4mol/dm^3. At equilibrium in a 1dm^3 vessel, 0.5 moles of SO2, 0.1 moles of O2, and 4.6 moles of SO3 were found. How many moles of oxygen must be added to ...
Thursday, October 29, 2015 by Karan

college chemistry
Describe the preparation of 250cm^3 of 0.05M H2SO4 given the following stock bottle solution. %purity=98 Specific gravity=1.84 Molecular weight=98
Wednesday, October 28, 2015 by Ezinase

chemistry
Calculate Delta G for each reaction using Delta Gf values: answer kJ ...thank you a) H2(g)+I2(s)--->2HI(g) b) MnO2(s)+2CO(g)--->Mn(s)+2CO2(g) c) NH4Cl(s)--->NH3(g)+HCl(g) is this correct? a) H2(g)+I2(s)--->2HI(g) From tables: G HI = +1.3 kJ/mol G H2 = 0 G I2 = 0 dG...
Wednesday, October 28, 2015 by Patrick

chemistry
If the specific heat of water is 4.180 J/(g/°C), what mass of water can be heated from 5.0 °C to 80°C by 27.0 kJ of heat?
Wednesday, October 28, 2015 by wendi

Chemistry
Two aqueous solutions, both at 25.00°C (100.0 mL of 0.223 M Pb(NO3)2 and 100.0 mL of 0.144 M Na2S), are mixed together in a calorimeter with a Ccalorimeter of 11.8 J/°C. The temperature of the solution increases by 2.40°C. Assuming that the density and heat ...
Wednesday, October 28, 2015 by Matt

Chemistry
2 KMnO4 + 5 H2C2O4 + 3 H2SO4 ---> 2 MnSO4 + 10 CO2 + 8 H2O + K2SO4 How many milliliters of a 0.123 M KMnO4 solution is needed to react completely with 3.141 of oxalic acid? Please help I've worked this every way I know.
Wednesday, October 28, 2015 by Tyler

Chemistry! HELP
A chemistry student used the symbol "sx" to represent an s orbital that lies along the x-axis. Is this reasonable. Justify your answer.
Wednesday, October 28, 2015 by Sarah

Chemistry! HELP
What information about an electron in an atom is given by the following quantum numbers? 2px+1/2 Answer? (idk if this is right) : An electron located in the p orbital in the 2nd main enrgy level would be said to be located in the 2p sublevel.
Wednesday, October 28, 2015 by Sarah

Chemistry
How many joules of heat are needed to completely vaporize 24.40g of H2O at its boiling point. Delta H vap = 40.6kJ/mol
Wednesday, October 28, 2015 by Cindi

Chemistry
Identify the excess reactant (HCl or NaOH) and its molar concentration when 1.55 g of NaOH is stirred into 150.0 mL of 0.250 M HCl.
Wednesday, October 28, 2015 by Tiffany

Chemistry DRBOB HELP ME PLEASE
Please help me N2O5(g) + H2O(l) --> 2HNO3(l) delta H° = -76.2 kJ H2O(l) --> H2(g) + 1/2O2(g) delta H° = 286.0 kJ 1/2N2(g) + 3/2O2(g) + 1/2H2(g) --> HNO3(l) delta H° = -174.0 kJ Calculate delta H° for the reaction 2N2O5(g) --> 2N2(g) + 5O2(g)
Wednesday, October 28, 2015 by Brooke

Chemistry DRBOB HELP ME PLEASE
Please help me N2O5(g) + H2O(l) --> 2HNO3(l) delta H° = -76.2 kJ H2O(l) --> H2(g) + 1/2O2(g) delta H° = 286.0 kJ 1/2N2(g) + 3/2O2(g) + 1/2H2(g) --> HNO3(l) delta H° = -174.0 kJ Calculate delta H° for the reaction 2N2O5(g) --> 2N2(g) + 5O2(g)
Wednesday, October 28, 2015 by Brooke

Chemistry
Calculate the mass of Fe(OH)3 s) produced by mixing 50.0 mL of 0.153 M KOH (aq) and 25.0 mL of 0.255 M Fe(NO3)3 (aq), and the number of moles of the excess reactant remaining in solution. I got 0.242 g Fe(OH)3 and 3.83 mmol Fe3+ remaining.
Wednesday, October 28, 2015 by Tiffany

chemistry conversion
Please help me with this problem converstion 0.04 ug/ul to ng/mL My answer is: 0.04 ug/ul = 40,000,000 ng/mL is this correct?
Wednesday, October 28, 2015 by Estera

Chemistry
Calculating theoretical yield and percentage yield from preparation of 4-acetoxybenzoic acid from the interaction of 4-hydroxybenzoic acid and sulphuric acid
Wednesday, October 28, 2015 by Andrew

Chemistry
how to write a balanced equation for the following reactions with amounts of released or absorbed heat expressed in numbers within the equation 1 mole of methane with O2 yields CO2 and H2O and releases 213 kcal of heat
Wednesday, October 28, 2015 by Tammy

Chemistry 218
assume all of the ionized aspirin remains in the buffer solution and all of the un-ionized aspirin goes into to the ethyl acetate, what is the molarity of the aspirin in the ethyl acetate at pH 2 and pH 8? what equation would ou use for this?
Wednesday, October 28, 2015 by Rebecca

Chemistry
How many oxygen atoms are there in 0.018 mg of H2O?
Wednesday, October 28, 2015 by Ashley

Chemistry
what principles in UV-VIS spectroscopy and IR regions? how to work with organice molecules in both radiations?
Wednesday, October 28, 2015 by jess

Chemistry
Arrange the following 0.100 mol L-1 solutions in order of increasing pH: CH3COOH, NaCl, NaCH3Coo
Wednesday, October 28, 2015 by Litia

Chemistry
How do you write the complete ionic equation and net ionic equation for ammonium chloride and copper (II) sulfate in water?
Wednesday, October 28, 2015 by Tiffany

chemistry
Write the net ionic equation for the following molecular equation. 3FeCl2(aq) + 2(NH4)3PO4(aq) Fe3(PO4)2(s) + 6NH4Cl(aq)
Wednesday, October 28, 2015 by jessica

Chemistry
How do you write the complete ionic equation and net ionic equation for ammonium chloride and copper (II) sulfate in water?
Tuesday, October 27, 2015 by Tiffany

Chemistry
I still don't get this problem! Toxic chemicals in drinking water usually are reported and a safety level specified in units of parts per million (ppm) by mass. What is the molar concentration of arsenic in a water sample that has 1ppm arsenic (As)? My teacher's work...
Tuesday, October 27, 2015 by Tiffany

chemistry BOB
is this the answer to B ) CH3CH2OH + 3O2 → 2CO2 + 3H2O In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are "burned" to water vapor andCO2. Write a combustion reaction ...
Tuesday, October 27, 2015 by Mark

chemistry
is this the answer to B ) CH3CH2OH + 3O2 → 2CO2 + 3H2O In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are "burned" to water vapor andCO2. Write a combustion reaction ...
Tuesday, October 27, 2015 by Mark

Chemistry
A swimming pool, 10.0 m by 4.0 m, is filled with water to a depth of 3.0 m at a temperature of 20.2°C. How much energy is required to raise the temperature of the water to 24.0°C?
Tuesday, October 27, 2015 by Stacey

Chemistry
Arrange the following oxides in order of increasing acidity: As2O5, P2O5, SnO2, N2O5, BaO, and SeO3. (Use the appropriate <, =, or > symbol to separate substances in the list.) I got BaO<SnO_2<As_2O_5<P_2O_5<N_2​O_5<SeO_3 but its wrong
Tuesday, October 27, 2015 by Emily

chemistry
help!!!! is this the answer to B ) C2H5OH(liq)+ 3O2(g) --> 2CO2(g) +3H2O(liq) In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are "burned" to water vapor andCO2. Write a ...
Tuesday, October 27, 2015 by Mark

chemistry DR BOB
is this the answer to B ) C2H5OH(liq)+ 3O2(g) --> 2CO2(g) +3H2O(liq) In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are "burned" to water vapor andCO2. Write a combustion ...
Tuesday, October 27, 2015 by Mark

Chemistry
Consider the reaction of Lithium with water: 2 Li(s) + 2H2O(l) ----> 2 LiOH(aq) + H2(g) The delta H of the reaction is -160 KJ The enthalpy of fusion of H2O is 6.0 kJ/mol The specific heat capacity of H2O(l) is 4.18 J/gC When 10 grams of Li(s) is dropped in a container ...
Tuesday, October 27, 2015 by Vinit

Chemistry
A weather balloon is inflated to a volume of 26.2 L at a pressure of 755 mmHg and a temperature of 32.5 ∘C. The balloon rises in the atmosphere to an altitude where the pressure is 360. mmHg and the temperature is -13.5 ∘C. Assuming the balloon can freely expand, ...
Tuesday, October 27, 2015 by Timmy

Chemistry
A 4.30g sample of solid BaCl2 2H2O was heated such that the water turned to steam and was driven off.Assuming ideal behavior, what volume would that steam occupy at 1.00atm and 373K?
Tuesday, October 27, 2015 by Anonymous

chemistry
Determine the quantity (g) of pure CaCl2 in 7.5 g of CaCl2•9H2O.
Tuesday, October 27, 2015 by lee

chemistry DR BOB!
is this the answer to B ) C2H5OH(liq)+ 3O2(g) --> 2CO2(g) +3H2O(liq) In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are "burned" to water vapor andCO2. Write a combustion ...
Tuesday, October 27, 2015 by Mark

chemistry
Calculate the mass of oxalic acid needed to prepare 150 ml of 0.442 M C2H2O4
Tuesday, October 27, 2015 by james

Chemistry
What is the bond enthalpy of N2(g)+2H2(g) --> N2H4(g)?
Tuesday, October 27, 2015 by E

Chemistry
Please help me N2O5(g) + H2O(l) --> 2HNO3(l) delta H° = -76.2 kJ H2O(l) --> H2(g) + 1/2O2(g) delta H° = 286.0 kJ 1/2N2(g) + 3/2O2(g) + 1/2H2(g) --> HNO3(l) delta H° = -174.0 kJ Calculate delta H° for the reaction 2N2O5(g) --> 2N2(g) + 5O2(g)
Tuesday, October 27, 2015 by Brooke

Chemistry
Iodine, I2, reacts with aqueous thiosulfate ion in neutral solution according to the balanced equation I2(aq)+2S2O2−3(aq)→S4O2ͨ​2;6(aq)+2I−(aq). How many grams of I2 are present in a solution if 33.00 mL of 0.165 M Na2S2O3 solution is needed to ...
Tuesday, October 27, 2015 by Mary

chemistry
At what ph will Al(OH)3 begin to precipitate from a .10 M solution of AlCl3?
Tuesday, October 27, 2015 by lisa

chemistry
150 mL of a solution contiains .00015 M NaI, .0055 M NaC, and .12 M Na3PO4. A solution of .10 M AgNo3 is slowly added. Who precipitates 1st, 2nd, and 3rd? When the last one to precipitate just begins to precipitate, what % of the other 2 anions are still remaining in solution?
Tuesday, October 27, 2015 by lisa

chemistry
How many grams of Ca(OH)2 can be dissolved in 550mL of a .0500 M NaOH solution. Ksp - Ca(OH)2 is 5.5 x 10-5
Tuesday, October 27, 2015 by lisa

chemistry
The nitrogen content of a .2476 g sample of a protein was determined by the Kjeldahl method. The NH3 produced with the whoosh was distilled into exactly 50.00mL of HCl in the receiving flask, which was in excess of the amount required to capture the ammonia gas. The excess HCl...
Tuesday, October 27, 2015 by lisa

chemistry
2. A 500 mL saturated silver carbonate solution at 5¢XC is treated with hydrochloric acid to decompose the compound. Ag2CO3(aq) + 2HCl(aq) ¡÷ 2AgCl(s) + CO2(g) + H2O(l) The carbon dioxide generated is collected in a 19 mL vial and exerts a pressure of 114 ...
Tuesday, October 27, 2015 by yung

chemistry
A 0.8612 g sample of a mixture consisting of NaBr, NaI, and NaNO3 was analyzed by adding AgNO3 to precipitate the Br¡V and I¡V, yielding a 1.0186 g mixture of AgBr and AgI. The precipitate was then heated in a stream of Cl2, converting it to 0.7125 g of AgCl. ...
Tuesday, October 27, 2015 by yung

chemistry Dr BOB
is this right? C2H6O + 3O2 = 2CO2 + 3H2O In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need ...
Tuesday, October 27, 2015 by Mark

analytical chemistry
At what ph will Al(OH)3 begin to preciptate from a .10 M solution of AlCl3?
Tuesday, October 27, 2015 by TK

analytical chemistry
150 mL of a solution contiains .00015 M NaI, .0055 M NaC, and .12 M Na3PO4. A solution of .10 M AgNo3 is slowly added. Who precipitates 1st, 2nd, and 3rd? When the last one to precipitate just begins to precipitate, what % of the other 2 anions are still remaining in solution?
Tuesday, October 27, 2015 by TK

analytical chemistry
How many grams of Ca(OH)2 can be dissolved in 550mL of a .0500 M NaOH solution. Ksp - Ca(OH)2 is 5.5 x 10-5
Tuesday, October 27, 2015 by TK

analytical chemistry
The nitrogen content of a .2476 g sample of a protein was determined by the Kjeldahl method. The NH3 produced with the whoosh was distilled into exactly 50.00mL of HCl in the receiving flask, which was in excess of the amount required to capture the ammonia gas. The excess HCl...
Tuesday, October 27, 2015 by Anonymous

Chemistry Dr. BOB
I don't get it!! In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing ...
Tuesday, October 27, 2015 by Mark

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