Wednesday
April 23, 2014

Search: zn+2hcl=zncl2+h2

Number of results: 4,503

Chemistry
first let's see if the chemical equation is balanced. Zn + HCl --> ZnCl2 + H2 since not yet balanced, then we balance it :P Zn + 2HCl --> ZnCl2 + H2 since we are given grams of Zinc, we need to find the mass of Zn from periodic table to convert it to moles. thus Zn = 65....
Friday, April 15, 2011 at 10:23am by Jai

Chemistry check
I need to balance the following equation. I just want to make sure I', right: Zn + HCl-> ZnCl2 + H2 Zn + 2HCl-> ZnCl2 + H2
Wednesday, March 11, 2009 at 5:16pm by Mike

Chemistry
Perhaps you aren't understanding what the equation tells you. Zn + 2HCl ==> ZnCl2 + H2. The equation tells us that 1 mol of Zn reacts with 2 mols HCl to produce 1 mol ZnCl2 AND 1 mol H2. So if we start with 4.3 g Zn, we have 4.3/65.4 = 0.06575 mol Zn metal. That IMMEDIATELY...
Thursday, January 10, 2008 at 5:23am by Anonymous

chemistry
In the reaction:Zn+ 2HCL>ZnCl2+h2.What mass ZnCl2 is produced when 10g of zn reacted
Monday, November 7, 2011 at 4:52am by Luc

chemistry
In the reaction:Zn+ 2HCL>ZnCl2+h2.What mass ZnCl2 is produced when 10g of zn reacted
Monday, November 7, 2011 at 4:53am by Luc

chemistry
Zn+ 2HCl ==> H2 + ZnCl2 Use PV = nRT and solve for n = number of mols H2. Substitute [0.980 atm - (23.8/760)] for P. Don't forget T must be in kelvin. After you have obtained n, convert from mols H2 to mols Zn using the coefficients in the balanced equation. The g Zn = mols...
Saturday, April 28, 2012 at 9:07pm by DrBob222

Chemistry
Zn + 2HCl ==> ZnCl2 + H2 moles Zn = 4.15/molar mass Zn = xx. xx moles Zn will produce xx moles H2 (since 1 mole Zn produces 1 mole H2 according to the equation.) xx moles H2 x (22.4 L/1 mol) = yy liters H2. Voila!
Monday, November 9, 2009 at 6:48pm by DrBob222

Chemistry
Are these reactions correct? I was told to do them in "reaction de deplacement simple", or simple moving reaction, I think. 1. Mg + 2HCl = H2 + MgCl2 2. Li + HCl = H2 + LiCl 3. Fe + 2HCl = H2 + FeCl2 4. Zn + 2HCl = H2 + ZnCl2 5. Ca + 2HCl = H2 + CaCl2 6. 2Li + H2O = H2 + Li2O ...
Thursday, October 2, 2008 at 10:26pm by Holly

Chemistry
Zn + 2HCl ==> H2 + ZnCl2 mols Zn = 4 from the problem. Using the coefficients in the balanced equation, convert mols Zn to mols H2. That's 4 mols Zn x (1 mol H2/1 mol Zn) = 4 mols H2. 1 mol H2 occupies 22.4 L at STP; therefore, 4 mols will occupy 4 mols x 22.4 L/mol = ? ...
Wednesday, December 12, 2012 at 6:33pm by DrBob222

Chem
Zn + 2HCl ==> ZnCl2 + H2 H2 gas is evolved. ZnCO3 + 2HCl ==> H2O + CO2 + ZnCl2 Both acid/base reaction AND CO2 gas is evolved.
Tuesday, December 2, 2008 at 3:38am by DrBob222

chemistry
Reacts with what? I'll assume HCl but it could be anything. 1. Write the equation. Zn + 2HCl ==> ZnCl2 + H2 2. Convert 25.0 g Zn to moles. moles = grams/molar mass. 3. Using the coefficients in the balancd equation, convert moles Zn to moles H2. 4. Now convert moles H2 to L...
Monday, July 5, 2010 at 1:30pm by DrBob222

Chemistry-Gases
Zn + 2HCl ==> H2 + ZnCl2 Use PV = nRT and solve for n = number of mols H2 at the conditions listed. Convert mols H2 to mols Zn, then g Zn = mols Zn x atomic mass Zn. b) Convert mols H2 to mols HCl, then M HCl = mols HCl/L HCl. Solve for L and convert to mL.
Wednesday, April 2, 2014 at 11:01pm by DrBob222

Chemistry
What mass of Zn will be dissolved in 10 mL pH=2 HCl solution? Zn + 2HCl--> ZnCl2 + H2
Monday, May 10, 2010 at 9:51pm by Kelly

CHEMISTRY
how many grams of zinc are required to react with excess acid to make one liter of hydrogen at STP? i have no clue how to go about this i need help Write the balanced equation. Zn + 2HCl ==> ZnCl2 + H2 2. Use PV = nRT to convert 1 L H2 gas to mols OR take the shortcut ...
Monday, April 23, 2007 at 10:48pm by yellowone

chemistry
This is a regular stoichiometry problem. Zn + 2HCl ==> ZnCl2 + H2 1. Convert HCl to moles. moles = M x L = ? 2. Use the coefficients in the balanced equation to convert moles HCl to moles Zn. 3. Convert moles Zn to grams. g = moles to molar mass. b) Convert moles (either Zn...
Wednesday, December 7, 2011 at 9:44am by DrBob222

chemistry
Zn + 2HCl ==> ZnCl2 + H2
Thursday, March 31, 2011 at 1:30am by DrBob222

chemistry
I wont show all work, ever. What teacher would ever do that? balance the equation Zn+ 2HCl>>ZnCl2 (aq) + H2(g) so for each mole of acid, you need half that moles of Zn. moles HCL: Volume*concentraioninMolarity moles of Zn needed: half of that. grams of Zn: molesZn*...
Wednesday, December 7, 2011 at 9:44am by bobpursley

chemistry
The reaction is: Zn + 2HCl --> ZnCl2 + H2 1 mole of any gas at STP is 22.4 L 112L of H2 / 22.4 L/mol = 5 moles H2 (5 mol H2)(1 mol Zn / 1 mol H2) = 5 moles of Zn The above relationship assumes that the reaction is 100% efficient. Since the reaction is only 85% efficient, ...
Tuesday, June 10, 2008 at 8:48pm by GK

chemistry
how many moles of HCl are needed to react with 2.3 moles of Zn in the following reaction? 2HCl + Zn --> ZnCl2 + H2
Tuesday, July 6, 2010 at 10:12am by Anonymous

chemistry
2 places and Zn + 2HCl -- ZnCl2 + H2 Find delta Hrxn for the reaction
Sunday, April 15, 2012 at 9:55pm by dtost

Chem
Zinc reacts with HCl to produce ZnCl2 and Hydrogen gas, H2. What volume, in ml of a 1.25 M solution would be required to completely react with 3.27 g of Zn? Zn(s) + 2 HCl (aq) -------> ZnCl2 + H2
Tuesday, December 13, 2011 at 11:08am by Meagan

chemistry please help!!!!!!!!!!!!!!!!!!!!!!
This is a stoichiometry problem. First you have to balance your reaction: Zn + 2HCL = H2 + ZnCl2 (This is irrelevant to answering the question because Zn and H2 both have coefficients of 1, but it's good to know) So you're given 13.05g of Zinc, you have to convert that to ...
Monday, May 31, 2010 at 1:19pm by Anonymous

chemistry
You have no information for #1. #2 is Zn + 2HCl ==> ZnCl2 +H2 You can add phases if that is needed.
Wednesday, February 15, 2012 at 2:00pm by DrBob222

Chemistry
Zn + 2HCl ==> H2 + ZnCl2 a. (P1V1/T1) = (P2V2/T2) P1 = 737.7-9.21 = ? P2 = 760 V1 = 127 mL V2 = ? T1 = 10 C changed to K T2 = 298K b. Use PV = nRT For P use P1 from above (convert to atm). V use V1 from above(convert to L) T use T1 from above (in kelvin). Solve for n. c. ...
Thursday, December 13, 2012 at 1:56am by DrBob222

science
How many grams of hydrochloric acid are required to react completely with 4.30g of zinc? How many molecules of gas will be produced? 1. Write the balanced chemical equation. Zn + 2HCl ==> ZnCl2 + H2 2. Convert grams Zn to mols. mols = grams/atomic mass Zn. 3. Using the ...
Saturday, March 17, 2007 at 10:58pm by Josh

Chemistry
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) So H2 is a gas and goes up the fume hood, the evaporating water does the same as does any excess HCl. What's left?
Monday, April 12, 2010 at 5:40pm by DrBob222

chemistry
2. Zinc metal reacts with HCL similarly to magnesium: Zn(s) + 2HCL(aq) = ZnCl2(aq) + H2(g). the H2 gas produced was collected over water at 25 degrees Celsius and had a volume of 7.80L at 0.980 atm. How many grams of Zn were consumed in the reaction? (Vapor pressure of water ...
Wednesday, May 2, 2012 at 3:26pm by preshi

Chemistry
given 65g of Zn and 65g of HCl, what is the limiting reactant and reactant in excess in Zn + 2HCl- ZnCl2 + H2
Monday, November 1, 2010 at 3:42am by Irene

chemistry
Zinc reacts with hydrochloric acid according to the reaction equation Zn(s)+2HCL(aq)=>ZnCl2(aq)+H2(g). How many mm of 1.50M HCL(aq) are required to react with 9.05 g of ZN?
Thursday, August 9, 2012 at 10:42pm by Mimi

Chemistry
Zinc reacts with hydrochloric acid according to the reaction equation... Zn (s) + 2HCl (aq) ---> ZnCl2 (aq) + H2 (g) How many milliliters of 5.00 M HCl (aq) are required to react with 5.55 g of Zn (s)??
Friday, October 4, 2013 at 11:21pm by Chelsea

Chemistry
Zn + 2HCl ==> ZnCl2 + H2 mols Zn = 0.10 mols HCl = M x L = 1 x 0.150 = 0.150 First you must determine the limiting reagent (LR). You know this is a LR problem because amounts are given for BOTH reactants. a. Convert 0.10 mol Zn to mols H2. That's 0.10 mol Zn x (1 mol H2/1 ...
Sunday, February 16, 2014 at 5:22pm by DrBob222

Chemistry
Two equations in two unknowns means two equations solved simultaneously. You should first balance both equations (which you should have done on all of these before posting). Another note: you should find the arrow key on your computer. You don't know what's what if you can't ...
Monday, October 7, 2013 at 6:56pm by DrBob222

chem
Zn + 2HCl ==> ZnCl2 + H2 mols HCl = M x L = ? From the equation, mols H2 formed is 1/2 mols HCl. I suppose you want the volume at STP. That will be mols H2 x 22.4L/mol = ?
Wednesday, February 29, 2012 at 11:55pm by DrBob222

chemistry
Zinc metal reacts with HCL similarly to magnesium: Zn(s) + 2HCL(aq) = ZnCl2(aq) + H2(g). the H2 gas produced was collected over water at 25 degrees Celsius and had a volume of 7.80L at 0.980 atm. How many grams of Zn were consumed in the reaction? (Vapor pressure of water at ...
Saturday, April 28, 2012 at 9:07pm by preshi

chemistry
Zn + 2HCl ==> ZnCl2 + H2 The equation tells you that 1 mole Zn reacts with 2 moles HCl. So 2 moles Zn will react with 4 moles HCl and 3 moles Zn will react with 6 moles HCl. Get the picture?
Tuesday, July 6, 2010 at 10:12am by DrBob222

Chemistry
Zn+ 2HCl -> ZnCL2+h2 what volume of hydrogen at stp is produced when 2.5 of zinc react with an excess of hydrochloric acid
Monday, October 1, 2007 at 8:58pm by Tyneice

Chemistry
How many liters of hydrogen at STP can be produced by the reaction of 4.15 g of zinc with hydrochloric acid: Zn + 2HCl -> ZnCl2 + H2
Monday, November 9, 2009 at 4:01pm by Christina

Chemistry
How many liters of hydrogen at STP can be produced by the reaction of 4.15 g of zinc with hydrochloric acid: Zn + 2HCl -> ZnCl2 + H2
Monday, November 9, 2009 at 6:48pm by Julie

Chemistry
Zinc reacts with hydrochloric acid according to the reaction equation: Zn(s)+2HCl(aq)->ZnCl2(aq)+H2(g) How many milliliters of 4.50M HCl1(aq) are required to react with 8.25g of an ore containing 30.0% Zn(s) by mass?
Sunday, October 7, 2012 at 8:12pm by Anna

ap chemistry please BOB HELP ME
Can you guys give me a clue in how to approach this problem? Commercial brass,an alloy of Zn and Cu,reacts with Hydrochloric acid as follows: Zn+2HCL-->ZnCl2+H2 (Cu does not reacts with HCL)When.0565g of a certain brass alloy is reacted with excess HCL,.0985g ZnCl2 is ...
Sunday, September 9, 2007 at 8:00pm by ana

Chemistry
This is a limiting reagent (LR) problem. You know that when an amount for BOTH reactants is given. Zn + 2HCl ==> H2 + ZnCl2 mols Zn = grams/molar mass. mols HCl = M x L = ? Using the coefficients in the balanced equation, convert mols Zn to mols H2. Do the same for mols HCl...
Monday, April 14, 2014 at 10:15pm by DrBob222

Ap chemistry
start by reading your text book. I'm sure there's a section regarding moles. Zn has a mol wt of 65.39, so 6.4g = 0.1 moles of Zn Since the reaction is Zn + 2HCl = ZnCl2 + H2 each mole of Zn reacts with 2 moles HCl So, you need .2 moles HCl .46M HCl has .46 moles/liter So, you ...
Monday, September 10, 2012 at 1:10pm by Steve

AP Chemistry
You find that from part B. The reaction in part B is Zn + 2HCl ==> ZnCl2 + H2 2Al + 6HCl ==> 2AlCl3 + 3H2 At this point you have Zn^+2 ions and Al^+3 ions in solution. Treatment with concd NH3 solution forms Al(OH)3 with the aluminum ions and Zn(NH3)4^+2 with the zinc ...
Sunday, April 3, 2011 at 2:28pm by DrBob222

Science
1.8 mol Zn and 7.3 mol HCl react according to the equation Zn + 2 HCl −→ ZnCl2 + H2 . If the limiting reactant is Zn, calculate the amount of ZnCl2 formed. Answer in units of mol
Tuesday, January 22, 2013 at 12:18am by Morgan

Chemistry
What is the complete and net ionic equations for: Cu+Zn+2HCl--> ZnCl2+Cu+h2
Friday, March 1, 2013 at 12:40am by Mike

Chemistry
A sample of zinc metal reacts completly with an excess of hydrochloric acid: Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) The hydrogen gas produced is collected over water at 25.0 C. The volume of the gas is 78.0 L & the pressure is 0.980 atm. Calculate the amount of zinc metal ...
Friday, August 12, 2011 at 7:51pm by ChemLover

chemistry
Zn + 2HCl ==> ZnCl2 + H2 mols Zn = grams/atomic mass Zn Convert mols Zn to mols HCl using the coefficients in the balanced equation. Then convert mols HCl to volume using M = mols/L. You know mols and M, solv for L and convert to mL. By the way, that is mL and not mm.
Thursday, August 9, 2012 at 10:42pm by DrBob222

chemistry
2KClO3 ==> 2KCl + 3O2 Convert 30g KClO3 to mols. mols = grams/molar mass. Using the coefficients in the balanced equation, convert mols KClO3 to mols O2. 2H2 + O2 ==> 2H2O Using the coefficients in the H2O equation, convert mols O2 from KClO3 reaction to mols H2. Zn + ...
Thursday, August 9, 2012 at 3:09am by DrBob222

chemistry
How many liters of gas can be produced at STP from 25.0 of ? Zn(s) + 2HCl(aq)->ZnCl2(aq) + H2(g) I'm using V=nRT/P and can't get this
Tuesday, May 18, 2010 at 1:31pm by michelle

chemistry
Your equation makes absolutely no sense. Zn + 2HCl ==> ZnCl2 + H2 and there is no way Cu^2+ can get into the solution on the right without being present on the left.
Wednesday, July 6, 2011 at 12:30pm by DrBob222

Ap Chem
how many milliliters of a 0.9 molar HCl solution are needed to react completely with 12 grams of zinc according to the following equation 2HCl+ Zn yields ZnCl2+ H2
Monday, September 10, 2012 at 1:21pm by Chasm

Chemistry
I have to write the balanced equation for the reaction between hydrochloric acid and zinc metal.I came to the answer of: HCl+Zn(s)-->H(g)+ ZnCl Can someone tell me if this is the correct balanced equation for this reaction? No it isn't but it's close. The gas hydrogen ...
Monday, April 23, 2007 at 2:30pm by Chrissy

chemistry
The following reaction is carried out as a source of hydrogen gas in the laboratory: Zn(s) + 2HCl(aq) ---> ZnCl2(aq) + H2(g) If 305 mL of hydrogen gas is collected over water at 25 C at a total pressure of 746 mm Hg , how many grams of Zn reacted?
Saturday, November 6, 2010 at 11:38am by amy

chemistry
The following reaction is carried out as a source of hydrogen gas in the laboratory: Zn(s) + 2HCl(aq) ---> ZnCl2(aq) + H2(g) If 305 mL of hydrogen gas is collected over water at 25 C at a total pressure of 746 mm Hg , how many grams of Zn reacted?
Saturday, November 6, 2010 at 11:41am by amy

AP Chem
How many mL of 3.84 M HCL are required to consume 4.12g of Zinc in the following reaction? Zn(s) + 2HCL(aq)----> ZnCl2(aq) + H2(g)
Monday, January 5, 2009 at 7:20pm by Bobby

Chemistry
An excess of zinc is added to 125 mL of 0.100 M HCl solution, What mass of zinc chloride is formed? Zn + 2HCl ----> ZnCl2 + H2
Thursday, April 29, 2010 at 12:06am by Ana

chem
moles Zn = 15.4 g Zn/atomic mass Zn. Convert moles Zn to moles ZnCl2 using the coefficients in the balance equation. Then M ZnCl2 = moles ZnCl2/L soln.
Saturday, March 19, 2011 at 2:07pm by DrBob222

chemistry
A 0.286g sample of Zn was used to produce H2(g)by the reaction. Zn(s)+ 2HCl(aq)> ZnCl2(aq) + H2(g) The barometric pressure was recorded as 761.6mm Hg and room temperature was 20degreesC. When the water levels of the eudiometer tube and graduated cylinder were equal, the ...
Monday, December 3, 2012 at 9:58pm by joann

Ap Chemistry.
Zn + 2HCl -> ZnCl2 + H2 If 7.29 g of Zinc reacted, how many liters of HCl were used? I know that i can't use mass volume conversion, because the HCl is not a gas...so what do i do?
Monday, October 25, 2010 at 8:00pm by Chris

chemistry
Write and balanced the equation. Zn + 2HCl ==> ZnCl2 + H2 How many moles HCl do you have? That's M x L = 0.150 x 0.300 = ?? Use the equation to convert mols HCl to moles H2. mols H2 = moles HCl x (1 mol H2/2 mols HCl) = moles HCl x (1/2) = ? = moles H2. If at STP, the ...
Tuesday, March 6, 2012 at 11:38pm by DrBob222

AP Chemistry
Write and balance the equation. Zn + 2HCl ==> ZnCl2 + H2 mols Zn = grams/molar mass Use the coefficients in the balanced equation to convert mols Zn to mols HCl. Now M HCl = mols HCl/L HCl. Youhave mols HCl and M HCl, solve for L HCl and convert to mL.
Tuesday, September 10, 2013 at 9:34pm by DrBob222

Chemistry
Question 9 Marks: 2 In the reaction: Zn + 2 HCl ZnCl2 + H2 An excess of Zn is reacted with 300.0 g of HCl. How many grams of H2 will be produced?
Monday, March 18, 2013 at 3:19pm by Lindt

Chemistry
Zn + HCl --> ZnCl2 + H2 If 18 grams of Zn are used in the following reaction, how many grams of H2 will be produced?
Friday, April 15, 2011 at 10:23am by Barbara

Chemistry
Zn(s) + 2 HCl(aq) H2(g) + ZnCl2(aq) When 25.0 g of Zn reacts, how many L of H2 gas are formed at STP? 1. 0.382 L 2. 0.0171 L 3. 22.4 L 4. 8.56 L 5. 4.28 L
Saturday, February 19, 2011 at 6:26pm by Milly

Chemistry
2.5 mol Zn and 8.75 mol HCl react according to the equation Zn + 2 HCl −→ ZnCl2 + H2 . Calculate the amount in moles of ZnCl2 formed. Answer in units of mol
Friday, February 21, 2014 at 12:10am by Zoey

Chemistry
Zinc metal reacts with hydrochloric acid according to the following equation: Zn + 2HCl yields ZnCl2 + H2. How many grams of hydrogen gas can be obtained if 50.0 g of zinc react completely?
Monday, March 11, 2013 at 1:41pm by Raymond

chemistry
Zn+2HCl -> ZnCl2 + H2 5.5 g of Zn = 5.5/65.382 M =0.0841 M 25 ml of 0.05M HCl = 25/1000*0.05 M = 0.00125 M < 0.0841/2 So the quantity of HCl governs. Assuming all HCl is consumed, amount of Hydrogen = 0.00125/2 M = 0.000625 M Convert that to the required temperature and ...
Saturday, May 25, 2013 at 8:24pm by MathMate

AP CHEMISTRY
Commercial brass, an alloy of Zn and Cu, reacts with hydrochloric acid as follows. Zn(s) + 2 HCl(aq) ZnCl2(aq) + H2(g) (Cu does not react with HCl.) When 0.5093 g of a certain brass alloy is reacted with excess HCl, 0.0953 g ZnCl2 is eventually isolated. (a) What is the ...
Thursday, August 1, 2013 at 5:18pm by Kris

DR.BOB HELP CHEMISTRY!
I balanced it and got: 2HCL + Zn ---> ZnCl2 + H2 And then to find moles I did: 8/65.37 and got 0.1124 moles. But now I'm stuck, what do I do next?
Tuesday, October 4, 2011 at 8:09pm by Rara

ap chemistry please BOB HELP ME
This doesn't change Bob Pursley's answer but let me try to help so you will "get the question." The idea in any analytical scheme is to start with a known mass of substance and convert it to something else that is known. You started with brass and converted the Zn in the brass...
Sunday, September 9, 2007 at 8:00pm by DrBob222

SCIENCE/CHEM
Usually you have a word equation and you convert that to a symbol equation. Zn + HCl ==> ZnCl2 + H2 Most of these can be balanced by trial and error. You learn to look for certain things. I would start this one by observing that I see 2Cl on the right and only 1 on the left...
Wednesday, May 12, 2010 at 9:22pm by DrBob222

chemistry
Zinc reacts with hydrochloric acid according to the following equation: Zn + 2HCl --> ZnCl2 + H2 If 3.63 grams of zinc react, how many grams of zinc chloride is produced?
Tuesday, May 22, 2012 at 11:23pm by beryl

Chemistry
In the activity series (see link below) Zn is above hydrogen; therefore, Zn will replace H^+. Zn + 2HCl ==> H2 + ZnCl2. http://www.files.chem.vt.edu/RVGS/ACT/notes/activity_series.html
Friday, November 11, 2011 at 1:37pm by DrBob222

Chemistry
1)You misread the first question. You DO have the correct amount of H2 formed. They are asking for the amount of HCl needed, not the amount of H2 produced. The atomic mass of Zn is 65.4 g/mol and the reaction is 2 HCl + Zn -> ZnCl2 + H2 You start with 0.06575 moles of Zn. ...
Thursday, January 10, 2008 at 5:23am by drwls

chemistry. Chl my answers please!
(1) To make NaTcO4, Tc metal is dissolved in nitric acid to make HTcO4, NO2 and H2O. Then the product HTcO4 is treated with NaOH to make NaTcO4. If you begin with 4.5 mg of Tc metal, how much of NaOH (in grams) is required to convert all of the HTcO4 into NaTcO4? Tc + 7HNO3 = ...
Wednesday, December 3, 2008 at 1:32am by Tiffany

Chemistry
Zn(s)+2HCl(aq) ->ZnCl2(aq)+Hx(g) How many millilters of 2.50M HCl(aq) are required to react with 3.95 of Zn(s)?
Sunday, April 13, 2014 at 9:10pm by Anonymous

Chem. Could someone check my answer.
(1) To make NaTcO4, Tc metal is dissolved in nitric acid to make HTcO4, NO2 and H2O. Then the product HTcO4 is treated with NaOH to make NaTcO4. If you begin with 4.5 mg of Tc metal, how much of NaOH (in grams) is required to convert all of the HTcO4 into NaTcO4? Tc + 7HNO3 = ...
Wednesday, December 3, 2008 at 1:16am by Tiffany

Chemistry
a. Chloride comes ONLY from HCl and none was used; therefore, mols Cl^- = M x L = ? and M = mols/L. That's 6.0 x 0.0500 for mols Cl^- and that/0.0502 for new M. b. Zn + 2HCl ==> ZnCl2 + H2 This is a limiting reagent problem with others all rolled into one. First determine ...
Thursday, October 25, 2012 at 11:37pm by DrBob222

chemistry
given the reactant amounts specified in each chemical eguation, determine the limiting reactant in each case: a. HCL+NaOH->NaCl+H2O 2.0 mole of HCl 2.5 mole NaOH b. Zn+2HCl->ZnCl2+H2 2.5 mole Zn 6.o mole HCl c. 2Fe(OH)3+3H2SO4->Fe2(SO4)3+6H2O 4.0 mole Fe(OH)3 6.5 mole...
Wednesday, March 3, 2010 at 6:43pm by christina

Chemistry
here is the equation:Zn(s)+2HCl(aq)-->ZnCl2(aq)+H2(aq).If 20.0 moles of zinc react with excess hydrochloric acid. how many moles of zinc chloride are produced?....thxxx
Friday, May 28, 2010 at 10:46am by Pierrysen

college chemistry
How many gram of Zn would be necessary to produce 534 grams of Fe by the sequence of reactions shown below? Step 1 Zn + HCl ==> ZnCl2 + H2 Step 2 Fe2O3 + H2 ==> Fe + H2O
Tuesday, October 23, 2012 at 6:19pm by ursula

chemistry
Zn(aq) + 2HCl(aq) ==> ZnCl2(aq) + H2(g) Second reaction is burning H2. 2H2(g) + O2(g) ==> 2H2O Usually we show heat by place a delta sign over the arrow. That can't be done on these boards; an alternative way is 2H2 + O2 + heat==> 2H2O
Sunday, March 4, 2012 at 7:27pm by DrBob222

chemistry
I need help Calculating the mass of HCL neede to react with 20.0 grams Zn. Zn+HCL -> ZnCl2+H2
Monday, February 9, 2009 at 6:50pm by Natalie

Chemistry-Rates of Reaction
A chemist wishes to determine the rate of reaction of zinc with hydrochloric acid. The equation for the reaction is: Zn(s) + 2HCl(aq) ---> H2(g) + ZnCl2(aq) A piece of zinc is dropped into 1.00 L of 0.100 M HCl and the following data were obtained: Time/Mass of Zinc 0 s/0....
Sunday, April 18, 2010 at 11:37am by Juggy

chemistry
Zinc metal reacts with hydrochloric acid to produce hydrogen gas according to the equation below. What volume of hydrogen at STP is released when 15.1 grams of zinc react at STP? Zn(s) + 2HCl(aq) ZnCl2(aq) + H2(g)
Thursday, June 9, 2011 at 1:04pm by katydid

chemistry please help!!!!!!!!!!!!!!!!!!!!!!
How many molecules of hydrogen are produced if 13.05 g of Zn reacts with excess hydrochloric acid equation Zn plus HCL equals ZnCl2 plus H2?
Monday, May 31, 2010 at 1:19pm by lulu

chemistry please help!
How many molecules of hydrogen are produced if 13.05 g of Zn reacts with excess hydrochloric acid equation Zn plus HCL equals ZnCl2 plus H2?
Tuesday, June 1, 2010 at 5:00pm by Anonymous

chemistry!!! /10th grade
How many molecules of hydrogen are produced if 13.05 g of Zn reacts with excess hydrochloric acid equation Zn plus HCL equals ZnCl2 plus H2?
Monday, May 31, 2010 at 11:07am by meme

science
Posted by Josh on Saturday, March 17, 2007 at 10:58pm. How many grams of hydrochloric acid are required to react completely with 4.30g of zinc? How many molecules of gas will be produced? For Further Reading science - DrBob222, Saturday, March 17, 2007 at 11:07pm 1. Write the ...
Sunday, March 18, 2007 at 2:37am by Josh

Chemistry
Zinc metal reacts with hydrochloric acid according to the following balanced equation. Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) When 0.114 g of Zn(s) is combined with enough HCl to make 51.1 mL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the ...
Friday, April 2, 2010 at 11:35pm by dina

chemistry
In the REDOX reaction in basic solution Zn-->Zn(OH)4+H2 I know that the first half reaction is 4H20+Zn-->Zn(OH)4 +4H+e but the second one is either 2e+2H2O--->H2+2OH (WHICH IS THE ANSWER GIVEN ON THE WORKSHEET) OR 2e+2H-->H2 I think both leads to the same answer= ...
Thursday, November 4, 2010 at 11:49pm by george

Chemisty.....Help =))
From the equation 1 mole of Zn(s) gives 1 mole of ZnCl2(aq) Number of moles of Zn is mass/molar mass of Zn 30.0 g /65.39 g mole^-1 =0.4588 mole so 0.4588 mole ZnCl2 is formed (because 1 mole of Zn(s) gives 1 mole of ZnCl2(aq)) which is in 285 ml final volume molarity is moles/...
Tuesday, December 7, 2010 at 11:05pm by Dr Russ

Chem
A mixture of chromium and zinc weighing .362 g was reacted with an excess of hydrochloric acid. After all the metals in the mixture reacted 225 mL of dry hydrogen gas was collected at 27 C and 750 torr. Determine the mass percent Zn in the metal sample. [Zinc reacts with ...
Sunday, February 25, 2007 at 5:26pm by Jim

Chemistry
ZnCl2 and excess NH3 forms the ammine complex Zn(NH3)4Cl2 Cu ion reacts with NH4OH to form Cu(NH3)4^2+ complex ion. NH3 and ZnSO4 does the same as ZnCl2 except it's Zn(NH3)4SO4 and not Zn(NH3)Cl2
Sunday, April 8, 2012 at 10:33pm by DrBob222

chemistry
A student generates H2(g) over water using the reaction between zinc and hydrochloric acid Zn(s)+ 2HCl(aq)---> ZnCl2(aq)+ H2(g) Data: Mass of vial and zinc 15.5082 mass of vial 15.3972 mass of zinc 0.111 final burette reading 45.30mL barometric pressure: Patm 100.6kPa ...
Wednesday, November 23, 2011 at 11:37pm by Yuli

chemistry
60 ml of H2 at STP is .060/22.4 = 0.0268 moles of H2 formed. Zn will release H2 in sulfuric acid, but Cu will not. If you have x grams of Zn and 1-x grams of Cu (total = 1.0 g), the Zn reaction will result in x/65.4 moles of H2. x/65.4 = 0.00268 moles x = 0.175 The alloy is 17...
Thursday, August 18, 2011 at 2:20am by drwls

Chemistry
Your second problem is a limiting reagent (LR) problem. You know it is a LR problem because amounts are given for BOTH reactants. You do these just like simple stoichhiometry problem BUT do it for EACH reagent then take the smaller amount formed as the product formed. Convert ...
Friday, February 21, 2014 at 12:10am by DrBob222

chem
What is the molarity of ZnCl2(aq) that forms when 15.4 g of zinc completely reacts with CuCl2(aq) according to the following reaction? (Assume a final volume of 175 mL.) Zn(s) + CuCl2(aq) --> ZnCl2(aq) + Cu(s) I got the moles of Zn but dont know what to do with it thanks
Saturday, March 19, 2011 at 2:07pm by Rebekah

s.t mary's school
You are talking about two separate reactions. Oxygen (O2) is being made with the reaction 2 KClO3 -> 2 KCl + 3 O2 while H2 is (we will assume) being made with the reaction Zn + 2 HCl -> ZnCl2 + H2 First, convert 30 g of KClO3 to moles. One mole of potassium chlorate is ...
Thursday, August 9, 2012 at 3:06am by drwls

Chem
For a, I would write ..........Zn(OH)4^- ==> Zn^2+ + 4OH^- I.........0.10.............0......0 C........-0.10...........0.1...+0.4 E..........0.............+0.1...0.4 Convert OH^- to pOH, then to pH. For b. Let x = solubility Zn(OH)2 .........Zn(OH)2 ===> Zn^2+ + 2OH^- E...
Sunday, March 25, 2012 at 8:46pm by DrBob222

Pages: 1

Search
Members