Number of results: 10,924
the combustion of 1.83 grams of a compound which only contains C,H, and O yields 4.88 grams of CO2, and 1.83 grams of H2O. What is the empirical formula of this compound? ------------------------------------------ 4.88 g CO2 x 1 mol CO2/44.01 g CO2 x 2 mol O2= .2217 mol O2 1....
August 19, 2012 by greeny
Calcium carbonate reacts w/stomach acid according to the following chemical equation. CaCO3+2HCl(aq)-> CaCl2(aq)+H2O(l)+CO2(g) A. Balance the eqaution B. Tums is one commercially sold antacid that contains CACO3. If Tums is added to 20.0ml of 0.400 M HCl, how many grams of ...
December 14, 2010 by Tony
For each of the following, write a net ionic equation (modeled above). Wherever there is a precipitate, state the name of the precipitate (e.g “lead iodide” from above). Pop onto the net and see if you can find a description of the physical properties (e.g colour) of this ...
September 2, 2010 by Noelle
chemical equation for saponification of methyl salicylate in 6 M NaOH. C8H8O3 + NaOH ---> C7H6O3Na + CH3OH + H2O is this the right reaction? is saponification like hydrolysis? what is the hydrolysis of methyl salicylate in 6M HCL? C8H8O3 + HCl ---> C7H6O3Cl + H2O
November 27, 2012 by 657
Gasohol contains ethanol (C2H4OH)(l), which when burned reacts with oxygen to produce CO2(g) and H2O(g). How much heat is released when 12.5g of ethanol burns? C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 3H2O(l) Delta H = -1368kJ
May 19, 2010 by Keith
Draw the condensed structural formula for the products of the acid hydrolysis of the following amide with HCl: CH3-CH2-C(=O)-NH2 + H2O + HCl ---> I'm afraid I don't even know where to begin with this one, help!
November 24, 2010 by Lindsay
A volume of equimolar strong acid like HCl is mixed with an equal volume of equimolar strong base like NaOH in a beaker of water. What exists after the reaction? 1. mostly water molecules and HCl, NaOH, and NaCl molecules 2. mostly water molecules and Na+ and Cl− ions 3...
October 1, 2012 by cheri
Indicate whether Delta S and Delta H is positive or negative. Then indicate if the reaction is entropy driven, enthalpy driven or neither. NaCl(s) + H2O(l) + Heat => NaCl (aq)
September 19, 2008 by Yuval
2LiOH + Co2 = Li2CO3 +H2O If a cannister absorbed 100.0g of CO2 from the air that resulted in the production of 148.5g of Li2CO3, what was the percent yeild for Li2CO3.
April 19, 2011 by dana
When a mixture of acetylene gas (C2H2) and oxygen is ignited and combusted, the reaction produces CO2 and H2O. What mass of acetylene is required to produce 150g of H2O?
October 31, 2010 by deb
a 0.4617g sample containing sodium bicarbonate was dissolved and titrated with standard 0.106M of hydrochloric acid solution , requiring 40.72ml. the reaction is: HCO3- + H+ -> H2O + CO2 Calculate the percent sodium bicarbonate in the sample. (Given molecular weight of ...
June 16, 2015 by zzz
Table sugar consists mostly of sucrose, C12H22O11. The standard enthalpy of combustion for sucrose is the standard state delta H for the reaction: C12H22O11 + 12 O 2 ---> 12 CO2 + 11 H2O Calculate this standard state delta H. Give answer in units of kJ to five significant ...
December 3, 2016 by Eli
Gasohol contains ethanol (C2H4OH)(l), which when burned reacts with oxygen to produce CO2(g) and H2O(g). How much heat is released when 12.5g of ethanol burns? C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 3H2O(l) Delta H = -1368kJ How do I solve this problem?
May 19, 2010 by Kieth
Complete the following table by replacing question marks with the correct numbers: (Note: Each horizontal row is a separate example, so in row #1, 175.32 grams of NaCl is how many moles of NaCl and how many molecules of NaCl does it contain?)Grams of NaCl Moles of NaCl Number ...
September 14, 2013 by queen
IM SO CONFUSED PLEASE HELP! H2 +CO2-->H2O + CO When H2 is mixed with CO2 at 2,000K, equilibrium is achieved according to the equation above. In one experiment, the following equilibrium concentrations were measured. [H2]= 0.20mol/L [CO2]= 0.30mol/L [H2O]=[CO]= 0.55mol/L a/ ...
April 3, 2007 by linds
Please help with Physical Science 2!! Confused!
Complete the following table by replacing question marks with the correct numbers: (Note: Each horizontal row is a separate example, so in row #1, 175.32 grams of NaCl is how many moles of NaCl and how many molecules of NaCl does it contain?) Grams NaCl Moles NaCl # Molecules ...
February 5, 2013 by Ella
Given the following reaction: 4 KO2 + 2 H2O + 4 CO2 4 KHCO3 + 3 O2 How many moles of H2O are needed to react with 12.15 moles of CO2? moles A chemical reaction occurs between solutions of LiCl and silver nitrate. This reaction produces a precipitate that is recovered, dried ...
October 22, 2010 by Erika
For the following reaction Co(g)+H2o(g)=Co2(g)+H2(g) If the initial concentrations of Co and H2o are 1.00 mol in a 50 L vessel, what is the number of mole of each species at equilibrium, if the equilibrium constant Kc= 0.85 at 1000 C? please can any one explain how to do this ?
October 20, 2016 by b.k
(b) One of your illustrious colleagues continues his/her education and finally obtains employment with a renowned pharmaceutical company as an organic chemist. He or she is asked to synthesize pantothenic acid because the company wants to use it to prepare a synthetic form of ...
April 26, 2011 by adam
Physicain elects to re-hydrate the patient br intravenous(IV) administration of 2.0 L of 0.45% (w/v) of NaCl. 0.45%9w/v) = 0.45g/100ml A.How many grams of NaCl were given? B.How many moles of Nacl were given? C.What is the molarity of the NaCl solution?
May 13, 2013 by Monica
green valley college
the principal constituents of natural gas is methane which burns in air according to the reaction CH4+O2=CO2+H2O How many grams of CO2 is produced when you have 50g of both CH4 and O2 what is the limiting reactant?
September 23, 2015 by rosvel
The mole fraction of CO2 in a certain solution with H2O as the solvent is 3.6 × 10−4. The molality of CO2 in this solution is about: A. 0.00036 m B. 0.0065 m C. 0.020 m D. 2.0 × 10−5 m E. 6.5 m
March 31, 2010 by nnn
the equilibrium constant Kc for the reaction H2 + Co2 to H2O + CO is 4.2 t 1650°C initially .80 mol of H2 and 0.8 mol Co2 are injected into a 5.0 flask. Calculate the concentration of each species at equilibrium
May 6, 2015 by Tintin
college chem 2
Calculate the deltaS univ for the dissolving of NaCl at room temp. S' NaCl(s)=72.11 J/k*mol; S' NaCl(aq)=115.5 J/k*mol;deltaH' NaCl(s)=-411.12 kJ/mol; deltaH' NaCl(aq)=-407.27 kJ/mol.
March 24, 2014 by shel
6.0g of cobolt (II) carbonate was added to 40cm3 of hydrochloric acid, concentration 2.0 mol/dm3. Calculate the maximum yield of cobalt (II) choloride-6-water and show that cobalt (II) carbonate was in excess. CoCO3 +2HCl = CoCl2 +CO2 + H2O CoCl2 + 6H2O = CoCl2.6H2O what is ...
January 1, 2017 by RM
2NaHCO3(s)+ heat -->Na2CO3(s)+ H2O(g)+CO2(g) is this right ? Determine how many moles of CO2(g) is produced when 7mols of NaHCO3 are consumed. question i asked earlier, i got 3.5 moles am i right ?
February 24, 2011 by Hannah
Chemistry Help Please!
An industrial chemist puts 1.00 mol each of H2(g) and CO2(g) in a 1.00-L container at 800oC. When equilibrium is established, 0.49 mol of CO(g) is in the container. Find Kc at 800 C for the following reaction: H2(g) + CO2(g) ⇌ H2O(g) + CO(g).
January 21, 2014 by Josh
Please double check...GK or Dr.Bobb22
Hi, i actually posted this up before..please double check the answers if i got them right have to hand in on Wednesday: The Chemicals are: Baking Soda- NaHC03 Calcium Chloride- CaCl2 Bromothymol Blue - (acid base indicator) _______________________________________ What is: (a) ...
January 19, 2009 by Saira
In a constant-pressure calorimeter, 50.0 mL of 0.300 M Ba(OH)2 was added to 50.0 mL of 0.600 M HCl. The reaction caused the temperature of the solution to rise from 21.73 °C to 25.82 °C. If the solution has the same density and specific heat as water, what is ΔH for ...
October 18, 2014 by wisa bedalie
Acid is required for calcium carbonate to fully dissociate. Determine the volume of 6M hydrochloric acid that must be added to dissolve the mass of CaCO3 you calculated in the question above taking into consideration the equations below. CaCO3->Ca+CO2 2H+CO2->H2CO3->...
October 14, 2015 by Jennifer
Write an equation for the combustion of one mole of benzene, C6H6(l), and use data from Appendix D to determine delta G degrees (which is 124.5) at 298K if the products of the combustion are (a) CO2(g) and H2O(l), and (b)CO2(g) and H2O(g). Describe how you might determine the ...
July 14, 2010 by Ashely
DrBob222 PLEASE HELP Hf of CO2 = -393.5 kJ/mol Hf of H2O = -285.8 kJ/mol The combustion reaction for benzoic acid C6H5CO2H(s) + 15/2 O2(g) → 7 CO2(g) + 3 H2O(ℓ) has ∆H0 = −3226.7 kJ/mole. Use Hess’s Law to calculate ∆H0f for benzoic acid. 1. ...
September 27, 2016 by Rachel M
Consider the following reaction: CO(g)+H2O(g)⇌CO2(g)+H2(g) Kp=0.0611 at 2000 K A reaction mixture initially contains a CO partial pressure of 1348torr and a H2O partial pressure of 1780torr at 2000 K. Calculate the equilibrium partial pressure of CO2. Calculate the ...
February 25, 2015 by Ryan
Chem 204 Lab
Dr. S. N. Too ran the above reaction using 10.00 g of 1,5-pentanediol and 7.00 g of HCl. He obtained 9.23 g of 1,5-dichloropentane. What was his per cent yield? HO(CH2)5OH + 2 HCl --------> Cl(CH2)5Cl + 2 H2O
September 12, 2012 by Justin
If 2.0 mol of propane are burned (reacted with oxygen), how many moles of carbon dioxide will be produced? C3H8 (g) + 5 O2(g) → 3 CO2 (g) + 4 H2O (g) I just want to make sure the answer is 6 mol of CO2 will be produced.
September 18, 2015 by Ashley
Combustion analysis of a 1.00g sample of ascorbic acid yields 1.500g of CO2 and 0.409g of H2O. What is the empirical formula of ascorbic acid? (a. CHO B.CH2O C. C2H4O2 D. C3H4O3 E.Cannot be determined with the information given. ) Convert the 1.5 g of CO2 and 0.409 g of H20 by...
July 24, 2005 by Jon
You have a sample of NaCl that contains 100 mg/ml NaCl. You are trying to perform an reaction that requires 10ml of 20 mg/ml. Enter in the correct amount (in ml) of Stock NaCl solution you need to use to make 10ml of 20 mg/ml NaCl
March 1, 2011 by mina
I have these 5 chemical equations and I keep getting the same 1:1 ratio on all of them. I must be doing something wrong! KCL + NaNO3 = KNO3 + NaCl HNO3 + KOH = H2O + KNO3 H2O + SO3 = H2SO4 4Na + O2 = 2Na2O 2NO2 = 2NO + O2
November 11, 2010 by Ann
Rolaids is an over the counter remedy for upset stomachs that functions by reacting with stomach acid. The active ingredients are calcium carbonate (550 mg) and magnesium hydroxide (110 mg). The inactive ingredients are dextrose, flavoring, magnesium stearate, polyethylene ...
March 13, 2015 by Jen24
I need help with a,b,and c. I tried to balance it but im having a little trouble Ethane gas, C2H6, burns in air and produces carbon dioxide and water vapor. a)write a balanced equation for this reaction. I know this isnt balanced but is this what im working with? C2H6 + O ---&...
March 25, 2007 by beth25
10). What is the molarity of an HCl solution if 42.5 mL of a 0.110 M KOH solution is needed to titrate a 25.0-mL sample of the acid? A) 0.187 M HCl B) 0.587 M HCl C) 0.0647 M HCl D) 5.35 M HCl E) 1.70 M HCl
November 28, 2011 by denis
A red blood cell is placed into each of the following solutions. Indicate whether crenation, hemolysis, or neither will occur. Solution A: 3.21% (m/v) NaCl Solution B: 1.65% (m/v) glucose Solution C: distilled H2O Solution D: 6.97% (m/v) glucose Solution E: 5.0% (m/v) glucose ...
September 29, 2011 by sol
Having trouble balancing redox equations. Teacher says I should use the method of half reactions and I'm not sure how. Any explanation or formula would be nice. C6H12O2 --> C2H4O2 SO2+H2O+O2 --> H2SO4 C2H6O+O2 --> CO2 + H2O
April 1, 2014 by Mike
hey guys need some help here!!! if 0.250mol of CO and 0.250mol of H2O were combined in a 125mL flask and the reaction allowed to reach equilibrium . Kc= 1.56. write the equ expression and calculate each substance Co(g) +H2O(g) .... Co2(g) +H2(g)
December 11, 2012 by Anonymous
Hi, I did an extraction experiment. I've got my basic layer, and getting my acidic salt in return. To do this, I am instructed to first "add a small amount of NaCl to help with the product precipitation". Then, again I am instructed to add HCl to "acidify" the solution. With ...
November 3, 2014 by Juan
Calculate the DHrxn of C57H110O6 (s) + O2(g) --> CO2(g) + H2O(l) with DHf. C57H110O6(s) -390.70 O2(g) 0 CO2(g) -393.5 H2O(l) -285.840 I balanced the equation: 2C57H110O6 (s) + 163O2(g) --> 114CO2(g) + 110H2O(l) and my work: DHrxn = [224mol(-393.5+(-285.840))] - [165mol(-...
November 17, 2015 by Anonymous
Are there formulas to solve the following problem? Complete the following table by replacing question marks with the correct numbers: (Note: Each horizontal row is a separate example, so in row #1, 175.32 grams of NaCl is how many moles of NaCl and how many molecules of NaCl ...
February 6, 2015 by alma
Lithium hydroxide is used in the space program to remove carbon dioxide (from respiration) in spacecraft. Specifically, lithium hydroxide, LiOH, reacts with carbon dioxide, CO2, ro form lithium carbonate, Li2CO3, and water. 2LiOH+CO2->Li2CO3+H2O, What mass of CO2 can be ...
March 30, 2012 by Trinny
I have to find the weight percent of Na2Co3 for my lab report that's due tomorrow but I have no idea how to do it. In the lab I had to wdight 0.4 g of the unknown soda ash sample into an erlenmyer flask and add about 50 mL of deionized water. Then I had to add 2 drops of ...
September 20, 2006 by bria
If 0.0490 mol of solid CaCO3 and 380 mL of 0.135 M aqueous H2SO4 are reacted, what volume (L) of gaseous CO2 measured at 1.1 atm pressure and 301 K is produced. H2SO4(aq) + CaCO3(s) → CO2(g) + CaSO4(s) + H2O(l)
November 21, 2010 by Confused
human blood contains dissolved carbonc acid in equilibrium with carbon dioxide and water according to the reaction: h2CO3(aq)<-->CO2(aq)+H2O(l) explain why decreasing the concentration of Co2 will ultimately decrease the concentration of H2CO3.
March 17, 2011 by Alexis
Using the equations and enthalpy values provided, which mathematical expression can be used to determine the unknown enthalpy change of the decomposition of propane? 3 C + 3 O2 3 CO2 H =-1182 kJ 4 H2 + 2 O2 4 H2O H = -1144 kJ C3H8 + 5 O2 3 CO2 + 4 H2O H = -2222 kJ C3H8 3 C + 4...
June 17, 2011 by bryan
The reaction CO(g) + H2O(g)--> CO2(g) + H2(g) has Kc = 102 at 500 K. If a reaction mixture initially contains 0.154 M CO and 0.154 M H2O, what will be the equilibrium concentration of H2?
May 2, 2011 by Ryan
NaOH(aq) + HCl(aq)----> H20 + Nacl(aq).. solve for the amoont of energy aborbed by the solution. (50ml of 1.0M HCl is 23deg; 50ml of 1.0M NaOH is at 25deg; mixed solutuion= 31deg pls tell me the steps to take inorder to solve the question. Thanks in advance.
May 4, 2010 by Ade
5) How many mL of 1M HCl is used to make the following dilutions? a) 100mL of 0.1M HCl = b) 250mL of 0.5M HCl= c) 10ml of 0.01M HCl= 36.64 is the molar mass of hcl do I divide that into ml?
March 16, 2014 by Selina
CO2 and NH3 combines together to form CH4N2O and H20. What is the mass of NH3 that would be needed to make 2 moles of CH4N2O. Balanced equation is CO2+2NH3-->CH4N2O+H2O
October 26, 2012 by chemdummy08
Consider the reaction between 52.0 mL of liquid ethanol (C2H5OH; density = 0.789 g/mL) and 25.4 L of O2 at 27.0°C and a pressure of 1.65 atm. The products of the reaction are CO2(g) and H2O(g). Calculate the number of moles of H2O formed if the reaction goes to completion.
November 9, 2014 by Tasha
Consider the reaction between 56.0 mL of liquid ethanol (C2H5OH; density = 0.789 g/mL) and 26.0 L of O2 at 27.0°C and a pressure of 1.95 atm. The products of the reaction are CO2(g) and H2O(g). Calculate the number of moles of H2O formed if the reaction goes to completion.
November 1, 2016 by Anonymous
Answer the questions about the following processes in the space provided below. You only need to indicate a process by its number. For each question list as many processes as apply. Process 1: 6 CO2 + 6 H2O → C6H12O6 + 6 O2 Process 2: C6H12O6 + 6 O2 → H2O + 6 CO2...
August 18, 2014 by Sydney
Ca(OH)2 reacts with CO2 to form CaCO3 and H2O. A. How many grams of CaCO3 will be formed if 4 grams of Ca(OH)2 are used? B. If you have 2.5 grams of Ca(OH)2 and 0.5 of CO2, which is the limiting reactant?
October 25, 2012 by Charles
A 1.272 g sample of a mix Na2CO3 and NaHCO3 vol of 0.24 N HCl required for PP end point 26.92 ml after the addition 52.21 ml more of the HCl and boilling out CO2 the vol of 0.12 NaoH required to give a pink colour to the soln = 4 ml
September 10, 2016 by naara
mass-mass conversions and mass-mole conversions: what is the difference and how do you do each? mass is converted to mols by mols = grams/molar mass. mass of one chemical is converted to mass of another chemical by using the coefficients in the balanced chemical equation. For ...
January 18, 2007 by Briana
Simple Chem Question: Please Answer
I can't remember if the reactant always on the left side and the product on the right side? 1 Ex: CaO + H2O arrow Ca(OH)2 2 Ex: 2NaHCO3 arrow Na2CO3 + H2O + CO2
May 24, 2010 by Anonymous
A1g sample of enriched water, a mixture of H2O AND D2O, reacted completely with Cl2 to give a mixture of HCl and DCl. The HCl and DCl were then dissolved in pure H2O to make a 1.00 L solution. A 25.00 mL, sample of the 1 L solution was reacted with excess AgNO3 and 0.3800g of ...
September 21, 2013 by Anirudh
given the following electronegativities Na=0.9, H=2.1, Cl=3.0 which of the following statements is true? H2,Cl2, and HCl are polar covalent molecules NaCl is a polar covalent compound and HCl is an ionic compound HCl is a nonpolar covalent compound and Cl2 is a polar covalent ...
February 23, 2014 by Dee Dee
here I have a (hopefully) balanced equation. Would you mind pointing out my errors, and explaining the right way to fix them? Thanks in advance. C5H12 + O2 yields CO2 + H2O I balanced this as: 2C5H12 +4O2 yields 5 CO2+6H2O.
April 1, 2009 by Krissa
Nitric oxide (NO) can be removed from gas-fired power-plant emissions by reaction with methane as follows: CH4(g) + 4NO(g) --> 2N2(g) + CO2(g) + 2H2O(g) Complete the equation relating the rates for each of the following: a) the rate of appearance of N2 to the rate of ...
October 15, 2012 by Brun
These are the answers I got for the following problems - am I right? 1) How many grams of water, H2O, and propene, C3H6, can be formed from the reaction of 6.0 g of 2-propanol, C3H8O? C3H8O ----> C3H6 + H2O 1.8g H2O and 4.2g C3H6 2) How many moles of water, H2O, can be ...
November 29, 2009 by Mary