Number of results: 19,704
a)consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP? b) What is the freezing point of an aqueous solution that boils at 102.1 C?
April 26, 2010 by Justin
A commercial for a well known cleaning powder says that it "shakes out white, then turns blue" what type of reaction os occuring? what compound can one use to produce this effect?
November 3, 2010 by Ash
What is the minimum amount of 5.2M H2SO4 necessary to produce 22.8g of H2 (g) according to the following reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g) (Please be precise and clear)
February 11, 2014 by Tyler Jones
a procedure in REGRESSION NALYSIS WHERE PREDICTOR OR INDEPENDENT VARIABLES ARE CODED AS 1 OR 0 (REPRESENTING CATEGORIES) AND CAN BE USED TO PRODUCE ANOVA TABLES UNDER THE GENERAL LINEAR MODEL IS KNOWN AS?
April 5, 2014 by Jo
A procedure in regression analysis where Predictor or Independent Variables are coded as 1 or 0 (representing categories) and can be used to produce ANOVA Tables under the General Linear Model is known as…?
April 6, 2014 by C
This type of functional group is often sweet smelling and may be used as a fragrance. When it reacts with water it will produce a carboxylic acid and an alcohol. I chose ester but it is wrong
May 10, 2014 by bekah
consider the chemical reaction, 2Al + 3Cl2 -> 2AlCl3. here, 212.7 g of chlorine can produce a maximum of 266.66 g of AlCl3 (molar mass of Al = 26.98 g and Cl = 35.45 g) true or false
October 4, 2014 by bekah
Hey can someone tell me how to graph this in excel please. Thanks. Produce a chart in Excel showing TC and TR with Q on the horizontal axis. Have Q go from 0 to 15,000 units. Produce a second chart showing MC and MR with Q again on the horizontal axis. Here is the problem for ...
September 16, 2010 by Alexis
8th-g Science: Need help to check answer!!!
Since I will have a science test next week based on these questions but my teacher won't check all answer with the class. I don't want to make a mistake and study to an incorrect answers. Do you mind to check the answers for me so that I am able to see if I got it correct or ...
March 6, 2014 by Cassidy
Select the paragraph which is correctly punctuated: A) Her medications include Premarin 0.625 mg q.d., Hismanal 10 mg q.d., Enalapril 10 mg q.a.m., 5 mg q.p.m., normal saline nasal spray, as needed, Vancenase nasal spray, Septra one p.o. b.i.d., Afrin 1 spray t.i.d. B) Her ...
December 12, 2012 by Marie
For the lab of Determining the % of iron in an iron ore sample The instructions were to: 1) Weigh out btw 0.3-0.4g of iron ore 2) disolve in concent HCl (10ml) and 3ml of 0.25M SnCl2 3) add enough tin so the yellow color disapeared 4) heat until sample decomposes and disolves ...
July 17, 2007 by christina
explain how to set up: what mass of iron(III) carbonate would be produced if 545 ml of 0.150 M iron(III) choloride were added to a solution containing excess sodium carbonate. Given reaction of 2FECL3(aq) + 3Na2CO3(aq)---- Fe2(CO3)3 (s) + 6 NaCl (aq) thank you
July 2, 2011 by Jamie
chemistry step by step thank a lot
Al2(s04)3 solution of a molal concentration is present in 1 litre solution of 2.684g/cc. How many moles of bas04 would be precipitated on adding bacl2 in excess? the answer 6M Who helps me step by step for me clearly I am thankful to all tutors
July 11, 2014 by ken
The antacid in question (with an active ingredient of Ca(HCO3)2), upon treatment with excess hydrochloric acid, a 0.413 g sample gives 92.85 mL of CO2 at 25.00oC and 1.000 atm. What percentage of the antacid is active ingredient? Assume a perfect system (i.e. the yield is 100%)
November 1, 2014 by kimberly
A health club offers memberships at the rate of $300, provided that at least 50 people join. For each member in excess of 50, the membership fee will be reduced by $2 for all members. Due to space limitations, at most 125 memberships will be sold. How many membersips should ...
October 22, 2012 by dino
Two companies, A and B, produce widgets. Each can produce 0, 1, 2, 3, or 4 widgets (they canâ€™tÂ produce fractions of widgets). Let X be the number of units produced by A, and Y be the number of units produced by B. Given X and Y, widgets will sell at a price equal to $(14-X...
May 5, 2011 by Phil
A constant pressure calorimeter having a heat capacity of 60.8 kJ/K is used to measure the energy released from burning a compound in excess oxygen to form CO2(g) and H2O(l). If the enthalpy of combustion of the compound is -2914.0 kJ/mol and the temperature of the calorimeter...
December 4, 2011 by LaurenB
Two charges q1 and q2 when separated by a distance r1 = R produce a force F1on each other. If the separation is increased to r2 = 2R, what is the new force F2 in terms of F1?
February 8, 2011 by Alex
CALCULATE THE MASS OF Na3PO3 PRODUCED AFTER 28.0g OF H3PO3 IS TREATED WITH 42.0g OF NaOH, AND ALSO CALCULATE THE MASS REMAINING OF THE EXCESS REAGENT. H3PO3+ 3NaOH = Na3PO3+ 3H2O
April 19, 2011 by dana
Two companies, A and B, produce widgets. Each can produce 0, 1, 2, 3, or 4 widgets (they canâ€™t produce fractions of widgets). Let X be the number of units produced by A, and Y be the number of units produced by B. Given X and Y, widgets will sell at a price equal to $(14-X-Y...
May 5, 2011 by Phil
A patient with polycythemia vera(excess production of red cells) receives raioactive phosphorus-32. Why would this treatment reduce the production of red blood cells in the bone marrow of the patient?
October 7, 2012 by Boo Boo
A 2.33-g sample of a mixture of CaCl2 and Ca(NO3)2 is treated with excess AgNO3(aq). The precipitate is filtered off, dried and weighed. The dried precipitate weighs 3.9 g. What is the percentage by mass of CaCl2 in the original mixture?
October 7, 2012 by Kevin
1.578 g of an unknown hydrocarbon (110.7 g/mol) burns in bomb calorimeter in excess oxygen. The heat capacity of the calorimeter,Cv, = 5.709 kJ/ºC and ΔT =7.995 ºC. Find ΔE for this hydrocarbon in kJ/mol.
March 31, 2015 by JUNDY
Aluminum oxide is formed by reaction of excess oxygen with aluminum. 4 Al(s) + 3 O2(g) -> 2 Al2O3(s) Calculate the mass of aluminum required to form 18.2 kg of aluminum oxide if the reaction has a percent yield of 83.4%.
October 2, 2014 by Cj
Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3NO2(g) + H2O(`) −! 2HNO3(`) + NO(g) If 745 L of NO2 gas react with water, what volume of NO gas will be produced? As- sume the gases are measured under the same conditions.
February 7, 2012 by Aaron
Air in the vicinity of a local power station contains 8.8x10^-4 gm^-3 SO2. What volume of 0.001moldm^-3 Iodine solution would be required to react with a solution obtained from 200dm^3 of contaminated air? The equation given is SO2 + I2 + 2H2O ==> H2SO4 + 2HI Thanks! :)
January 26, 2013 by Matt
In the SN2 mechanism, considering that the nucleophile attacks at the same time as the leaving group leaves, what would the effect of having a hindered (crowded) reaction center be on the rate of the reaction? Would you expect it to react slower or faster than an unhindered ...
April 14, 2014 by Laura
How many milliliter of 0.150 M H2SO4 (sulfuric acid) are required to react with 1.87 g of sodium hydrogen carbonate, NaHCO3, according to the following equation? H2SO4 + 2NaHCO3 --> Na2SO4 + 2H2O + 2CO2 dont understand this am i suppose to change 1.87 into Molarity for ...
July 23, 2011 by Henry
Estimated and Actual Goodwill Passion Company is trying to decide whether or not to acquire Desiree Inc. The following balance sheet for Desiree Inc. provides information about book values. Estimated market values are also listed, based upon Passion Company’s appraisals. ...
April 11, 2010 by Tina
1. I liked the work very much because I could help orphans who needed love. 2. I liked the work very much because I could help children who had no father and mother. 3. I liked the work very much because I could help orphans who needed care. 4. I liked the work very much ...
October 24, 2010 by rfvv
The hydrolysis of sucrose into glucose and fructose in acidic water has a rate constant of at 25 degrees C. Assuming the reaction is first order in sucrose, determine the mass of sucrose that is hydrolyzed when 2.60 L of a 0.150 M sucrose solution is allowed to react for 190 ...
February 28, 2010 by Katherine
1. Which of the following statements is incorrect about homologous chromosomes? a. Homologous chromosomes are similar but not identical b. Homologous chromosomes have the same size and function c. Homologous chromosomes contain genes for the same kind of protein products d. ...
October 23, 2013 by Phillip
With which of the following will the weak acid HCHO2 react? If a reaction occurs, write the balanced molecular equation. If no reaction occurs write the left half of the reaction and use "NR". Do not include physical states in your answers. KOH: NH3:
November 1, 2011 by Colt
write out the balanced equation when Iron(II) sulfate, potassium permanganate, and sulfuric acid react to form Iron (III) sulfate, manganese (II) sulfate, Potassium sulfate, and water.
October 14, 2013 by Jane
A 11.0-mL sample of an unknown H3PO4 solution requires 116mL of 0.140 KOH to completely react with the H3PO4. What was the concentration of the unknown H3PO4 solution (answer in M). H3PO4(aq) + 3KOH(aq) --> 3H2O(l) + K3PO4(aq)
July 23, 2014 by April