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April 20, 2014

Search: calcium carbonate

Number of results: 2,033

chem
If 0.752 g of pure sodium carbonate was dissolved in water and the solution titrated with 25.90 mL of hydrochloric acid to a methyl orange end point, calculate the molarity of the hydrochloric acid solution. (Hint: This process takes the carbonate ion to carbon dioxide.) Do I ...
Sunday, April 3, 2011 at 4:00pm by Beth

chemistry
how many moles of potassium carbonate will be produced if 400.0 g of potassium hydrogen carbonate are heated
Tuesday, October 6, 2009 at 5:56pm by Tierney

chemistry
If 10.0 g of CaCO3(s) is heated, 5.61 grams of solid CaO will remain (4.39 g CO2 gas is driven off) If 3.25 g of NaCl(s), which does not undergo decomposition, is mixed with 5.30 g of CaCO3(s) and the mixture is heated long enough to decompose all of the calcium carbonate, how...
Thursday, September 9, 2010 at 9:54pm by Keenan Flemming

Chemistry
Are these correct? 1. KBr: Potassium Bromide 2. Cu2O: Copper (I) Oxide 3. HCl: Hydrochloric Acid 4. N2O4: Dinitrogen Tetroxide 5. H3P: Hydrophosphoric Acid 6. FeS: Iron (II) Sulfide 7. Ag2SO4: Silver Sulfate 8. HNO2: Nitrous Acid 9. Pb(CO3)2: Lead (IV) Carbonate 10. Ba(NO3)2: ...
Wednesday, January 12, 2011 at 1:30pm by Anonymous

Chemistry
The acid-base reaction between phosphoric acid, H3PO4, and calcium hydroxide, Ca(OH)2, yields water and calcium phosphate. For each mole of calcium phosphate produced by this reaction, how many moles of water are also produced?
Saturday, September 19, 2009 at 10:02pm by Anonymous

chemistry
Hydrochloric acid reacts with calcium to form hydrogen and calcium chloride. If 100 grams of hydrochloric acid reacts with 100 grams of calcium, what is the limiting reactant? 2HCl + Ca --> CaCl2 + H2
Monday, June 18, 2012 at 10:15am by tyler

Chemistry
One of the main components of hard water is CaCO3. When hard water evaporates, some of the CaCO3 is left behind as a white mineral deposit. If hard water solution is saturated with calcium carbonate, what volume of the solution has to evaporate to deposite 1.00x10^2 mg of CaCO3
Sunday, April 24, 2011 at 9:12pm by Trista Nigh

calcium cloride
we are having a ice cream industry we are using calcium cloride to get -35 degree now we are getting -25 degree density of liquid is 1.210 how many kilo grams of calcium cloride to mix in liquid to get the density of 1.300 the liquid is nearly 3000 liters
Sunday, April 3, 2011 at 12:22am by chitti

science(chemistry)
why sodium carbonate against hydrochloric acid titration using phenolphthalein indicator does not go to completion but stops at the sodium hydrogen carbonate stage.
Monday, November 21, 2011 at 6:14am by yussif

chemistry
how much calcium oxide is recovered when 250 g calcium hydroxide are heated given the following reaction? Ca(OH)2 arrow CaO + H2O
Monday, April 11, 2011 at 7:14pm by cam

Chemistry
Calcium carbide, CaC2, can be produced in an electric furnace by strongly heating calcium oxide (lime) with carbon. The unbalanced equation is CaO(s) + C(s) CaC2(s) + CO(g) Calcium carbide is useful because it reacts readily with water to form the flammable gas acetylene, ...
Saturday, February 5, 2011 at 11:30am by Mariana

Chemistry
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 ...
Tuesday, December 14, 2010 at 9:53pm by Tony

Chemistry
An antacid tablet containing magnesium hydroxide instead of calcium carbonate was dissolved in 100.0 mL of 0.2893 M HCL. 10 mL of this solutions was titrated to endpoint with 25.20 mL of 0.1007 M NaOH. How much magnesium hydroxide was in the antacid tablet(in mg)? Any help is ...
Tuesday, May 7, 2013 at 9:28pm by Mindy

Chemistry
Ca(C2H3O2). %Ca = [(mass Ca)/(mass calcium acetate)]*100 %H = [(mass H)/(mass calcium acetate)]*100 %O = [(mass O)/(mass calcium acetate)]*100 %C = [(mass C)/(mass calcium acetate)] *100 Use atomic mass for mass of the atoms multiplied by the number of atoms in calcium acetate...
Thursday, January 3, 2008 at 8:18pm by DrBob222

chemistry
acetic acid, phosphoric acid, hydrochloric acid. sodium bicarbonate, magnesium hydroxide, aluminum hydroxide calcium carbonate, sodium bicarbonate, magnesium sulfate.
Sunday, July 18, 2010 at 6:04pm by DrBob222

chemistry
For the disadvantages check the link given to you by DrBob. The main advantage is that calcium ions in solution precipitate as calcium phosphate thus removed from the water.
Sunday, April 12, 2009 at 8:49pm by GK

chemistry
How many grams of solid sodium sulfate can be added to 1000L of a 0.02mol/L solution of calcium chloride before a precipitate forms? (Ksp for calcium is 6.1x10^-5)
Tuesday, July 27, 2010 at 10:32pm by Kat

more chemistry help and proofread
write the formulas for the following potassium sulfide i put KaS Tin (IV) chloride i put SnCl4 Dihydrogen sulfide i put H2S Calcium Oxide i put CaO Hydrobromic acid i put HBr Aluminum Fluoride i put AlF3 dinotrogen pentoxide i put N2O5 Iron (III) carbonate i put Fe2(CO3)3
Saturday, March 8, 2008 at 5:11pm by John

Stoichometry
Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 0.55 mole of sodium carbonate is mixed with one containing 0.55 mole of silver nitrate. After the reaction is complete, the solutions ...
Wednesday, December 19, 2012 at 11:54pm by Nicola

Chemistry
Our class did an expeiment of adding sodium carbonate and calcium chloride. The experiment only yielded 28% of the calculated yield. The class did the experiment as a group (there are only 4 students in our class) and the experiment was closely supervised by our teacher to ...
Wednesday, October 26, 2011 at 11:13pm by Robert

chemistry
If 16.9 g sodium carbonate is obtained from the thermal decomposition of 75.0 g of sodium hydrogen carbonate according to the unbalanced equation, NaHCO3 Na2CO3 + H2O + CO2 What is the percent yield?
Sunday, September 18, 2011 at 1:04pm by kaci

chemistry
if you added sulfuric acid to calcium nitrate what products in addition to calcium sulphate would you get if any ? if you start with calcium nitrate mixed into H2SO4 (aq), wouldn't you get a solution of nitric acid? H2SO4 + Ca(NO3)2 >>> 2 HNO3(aq) + CaSO4(s)
Monday, August 13, 2007 at 11:33am by walter

chemistry
i am having trouble answering this question. Help please! The balanced chemical equilibrium equation to show the formation of the calcium carbonate solid in limestone caves is CO2(g) + H2O(l) + CaCO3(s)  Ca2+(aq) + 2HCO3(aq) Use Le Chateliers principle to predict what ...
Saturday, February 27, 2010 at 10:55am by Evan

math
One more problem... An orange contains 50 mg of calcium and 0.5 mg of iron. An apple contains 8 mg of calcium and 0.4 mg of iron. How many of each are required to obtain 151 mg of calcium and 2.55 mg of iron?
Sunday, February 6, 2011 at 6:29pm by nellyp

chemistry
Although soluble barium compounds are toxic, suspensions of insoluble barium sul- fate are routinely swallowed for upper gas- trointestinal X-ray studies. Why is barium carbonate not used? 1. Stomachs contain HCl and all carbonates dissolve in acid.2. Barium carbonate is too ...
Wednesday, September 19, 2012 at 5:12pm by cheri

chemistry
aspirin (acetylsalicylic acid), vitamin C (ascorbic acid) and vitamin B-12 (folic acid) are acids. Aluminum hydroxide, magnesium hydroxide and calcium carbonate are bases used as stomach antacids. Magnesium citrate (laxative), ferrous sulfate (iron supplement), morphine ...
Sunday, August 31, 2008 at 5:01pm by GK

chem
when water is added to solid calcium carbide, CaC2, acetylene gas, C2H2, and calcium hydroxide, Ca(OH)2 are produced. how do i write a balanced equation for the reaction.
Wednesday, April 14, 2010 at 10:55am by herjaz

chemistry
when water is added to solid calcium carbide, CaC2, acetylene gas,C2H2,and calcium hydroxide,Ca(OH)2, are produced. how do i write a balanced equation for the reaction.
Monday, April 19, 2010 at 2:09pm by 6784

college
0.02 g of CaCO3 is dissolved in 1 L of water. Calculate the moles of calcium carbonate that have dissolved in the water, the moles of Ca2+ ions in solution, and the number of Ca2+ ions in solution?
Wednesday, January 27, 2010 at 6:24pm by mike

Chemistry
0.02 g of CaCO3 is dissolved in 1 L of water. Calculate the moles of calcium carbonate that have dissolved in the water, the moles of Ca2+ ions in solution, and the number of Ca2+ ions in solution?
Wednesday, January 27, 2010 at 6:29pm by mike

Chemistry
Assume that the normal blood buffer contains 0.00080 M carbonic acid and 0.0085 M hydrogen carbonate, the pKa = 6.35 for carbonic acid and the volume of blood in the body is 7.00 L. The blood pH, due to disruption is now 7.20. What is the ratio of [HCO3−]/[H2CO3] now ...
Monday, November 11, 2013 at 11:05pm by Natalie

AP Chemistry
Although soluble barium compounds are toxic, suspensions of insoluble barium sul- fate are routinely swallowed for upper gas- trointestinal X-ray studies. Why is barium carbonate not used? 1. Barium carbonate is too expensive. 2. Barium carbonate is soluble in plain wa- ter. 3...
Friday, September 17, 2010 at 6:04pm by Nick

Chemistry
How many moles of lithium carbonate are contained in 400 mL of a lithium carbonate solution with a concentration of 0.015 mol L-1? Give your answer as two sig. figures, followed by a space and the units
Wednesday, June 13, 2012 at 9:28pm by Kareena Kapoor

cHEMISTY
If Ksp for the dissolution of silver carbonate is 8.1x10-12, calculate the concentration of silver ions present in a saturated solution of silver carbonate
Saturday, March 30, 2013 at 3:20pm by john

Chemistry
A 28.4378 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 17.6846 g. ...
Tuesday, September 10, 2013 at 10:37am by Zawng

AP Chemistry
A 21.0054 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g) . After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 19.0732 g. ...
Tuesday, September 13, 2011 at 9:26pm by Tina

AP chemistry
A 22.709 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 15.3018 g. Assuming...
Wednesday, September 5, 2012 at 9:10pm by valerie

AP Chemistry
A 28.4858 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s)→MgO(s) + CO2(g).After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 17.3014 g. Assuming ...
Friday, August 30, 2013 at 8:30pm by Gabriella

chemistry
calcium metal (Ca) can be produced by passing an electric current through molten calcium chloride. chlorine gas is also formed. what is the balanced equation for this reaction
Wednesday, January 2, 2013 at 6:42pm by Anonymous

CHEMISTRY
The concentration of Pb2+ in a sample of wastewater is to be determined by using gravimetric analysis. To a 100.0-mL sample of the wastewater is added an excess of sodium carbonate, forming the insoluble lead (II) carbonate (267.2092 g/mol) according to the balanced equation ...
Monday, October 21, 2013 at 4:16pm by Anonymous

CHEMISTRY
The concentration of Pb2+ in a sample of wastewater is to be determined by using gravimetric analysis. To a 100.0-mL sample of the wastewater is added an excess of sodium carbonate, forming the insoluble lead (II) carbonate (267.2092 g/mol) according to the balanced equation ...
Monday, October 21, 2013 at 4:21pm by Anonymous

CHEMISTRY
The concentration of Pb2+ in a sample of wastewater is to be determined by using gravimetric analysis. To a 100.0-mL sample of the wastewater is added an excess of sodium carbonate, forming the insoluble lead (II) carbonate (267.2092 g/mol) according to the balanced equation ...
Monday, October 21, 2013 at 4:21pm by Anonymous

CHEMISTRY--PLEASE HELP, URGENT
A saturated solution of CaSO4(aq) is made in a beaker until there is excess calcium sulfate resting at the bottom. Then solid potassium sulfate is added. Which of the following is true? (The Ksp for potassium sulfate is larger than the Ksp for calcium sulfate) a. More calcium ...
Monday, April 12, 2010 at 10:39pm by Maggie

chem HARD
Li is in group I; therefore, it has 1 electron in its outside shell and can give it away to a receptor, such as chlorine, bromine etc to make LiCl or LiBr. But when making lithium carbonate, it needs to give away TWO electrons because carbonate takes TWO electrons. Thus TWO Li...
Monday, April 7, 2014 at 6:27pm by DrBob222

College Chemistry
In this lab: we demonstrated the method of evaporation of a saturated sodium chloride solution. The following question ask: 1) why is sodium chloride chosen for the solute? 2)Suggest reasons why the following were not chosen for the solute? a)Calcium carbonate (CaCO3)= b)...
Saturday, September 4, 2010 at 2:42am by Tim

biology
In humans, dietary calcium helps maintain strong bones and teeth. Calcium is absorbed into the blood stream by the cells that line the small intestine. Bone cells called osteoblasts absorb calcium from the blood and use it to form the mineralized part of bone called bone ...
Thursday, September 6, 2007 at 4:44pm by Jen

AP Chemistry i need help!
A 21.5997 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 15.5207 g. ...
Tuesday, September 4, 2012 at 10:58pm by Rafael

chemistry
First you need to find the limited reactant. You do this by dividing the 2.0 g of NaSO4 by it's molar mass as well as the 2.0 g of Calcium Sulfate dihyrdate (CaCl2 + 2H20) You'll find that the Calcium sulfate is the limited reactant. From there you Take the moles of Calcium ...
Monday, October 21, 2013 at 1:40am by Tanner

chemistry
A 0.500 L solution of 7.50 M hydrochloric acid is used to neutralize a 250.0 g sample of calcium hydroxide. Calcium chloride a chemical used to control highway dust, strengthen concrete mixes, and add flavor to foods is produced by the reaction. 2 HCl + Ca(OH)2 → ...
Monday, March 1, 2010 at 4:34pm by DrBob222

Chemistry
Some solid calcium oxide in a test tube picks up water vapor from the surrounding to change completely into solid calcium hydroxide. An observed total initial weight (calcium oxide + test tube) f 10.860g goes eventually to 11.149g. What is the weight of the test tube?
Sunday, September 25, 2011 at 6:28pm by Lucy

8th grade physical sience
carbonate: A salt or ester of carbonic acid, containing the group CO3. The reaction of carbonic acid with a metal results in a salt (such as sodium carbonate), and the reaction of carbonic acid with an organic compound results in an ester (such as diethyl carbonate).
Monday, November 17, 2008 at 6:46pm by Taylor

chemistry
A sodium carbonate, Na2CO3, solution would neutralize ethanoic acid forming sodium acetate in the aqueous layer. A calcium chloride solution, CaCl2, would mix with the ethanol in the aqueous layer. Most of the ester would be in a separate layer on top of the water layer. The ...
Friday, September 11, 2009 at 7:26am by GK

DrBob222-Questions
Can you please check these for me. Thank you very much in return:-) For Al2(SO4)3 you gave me Aluminum ion and Sulfate ion. These are the rest: CaCl2 = Calcium ion and Chlorite ion Na2O = Sodium ion and Oxygen ion AgCl = silver ion and chlorine ion Na3PO4 = Sodium ion and ...
Tuesday, April 20, 2010 at 11:39pm by Sara

chemistry
what volume of 0.250 M calcium chloride needs to be added to sodium phosphate to produce 35.0 g of calcium phosphate ?
Wednesday, December 15, 2010 at 8:18pm by jenna

Science
An aqueous solution of calcium chloride boils at 101.3. How many kilograms of calcium chloride were dissolved in 1000 g of the solvent?
Wednesday, January 25, 2012 at 8:52pm by Nita

chemisty
What volume of 0.250 M calcium chloride needs to be added to sodium phosphate to produce 35.0g of calcium phosphate?
Thursday, November 29, 2012 at 8:00pm by kenny

chemistry
Calcium carbonate CaCO3 reacts with stomach acid (HCl, hydrochloric acid) according to the following equation: CaCO3(s)+2HCl(aq)->CaCl2(aq)+H2O(l)+CO2(g) Tums, an antacid, contains CaCO3. If Tums is added to 35.0 mL of 0.300 M HCl,how many grams of CO2 gas are produced?
Friday, October 8, 2010 at 10:48pm by Dana

Science
How many grams of barium carbonate can be produced from mixing 100.0 mL of 0.20M barium nitrate and 50.0 mL of 0.30M potassium carbonate?
Wednesday, March 14, 2012 at 7:51pm by Mallory

Finite Math
A dietitian wishes to plan a meal around three foods. The meal is to include 16,200 units of vitamin A, 4,620 units of vitamin C, and 680 units of calcium. The number of units of the vitamins and calcium in each ounce of the foods is summarized in the table below. Determine ...
Sunday, September 11, 2011 at 5:01pm by Dee

Chemistry
a solution saturated in calcium hydroxide(limewater) has a pH of 12.35. What is Ksp for calcium hydroxide? How do i start this problem. please
Thursday, April 10, 2008 at 10:11pm by LT

Chemistry
How can you do an experiment and not know if something dissolved or not? Calcium sulfate is the only one that is not VERY soluble. And calcium sulfate is not nearly as insoluble as many compounds.
Friday, September 25, 2009 at 6:43pm by DrBob222

Chemistry
Calcium phosphate is indeed a precipitate. The cesium and chloride ions stay in solution. The formula for Calcium phosphate is Ca3(PO4)2
Tuesday, November 3, 2009 at 12:34pm by bobpursley

chemistry
Only 6.1 mg of calcium oxalate, Ca(C2O4) dissolves in 1.0 L of water at 25 Celsius. What is the solubility product of calcium oxalate?
Sunday, May 23, 2010 at 4:13am by kris

chemistry!
an aqueous solution of calcium chloride boils at 101.3 degrees Celsius. How many kilograms of calcium chloride were dissolved in 1000.0 g of the solvent??
Tuesday, May 25, 2010 at 5:32pm by Ana

chemistry
Well the equivalence point in volume is 11.3 mL and the pH is 7.45. We did a titration lab of calcium hydroxide. Ksp of calcium hydroxide
Tuesday, November 1, 2011 at 10:07pm by Kris

SCIENCE/CHEM
Dr Bob Is it true that only TWO molecules of water are required to balance the equation for the reaction of HCL with Calcium Hydroxide.(calcium chloride is the other product....why??? Thanks andy
Wednesday, May 12, 2010 at 10:34pm by Andy

AP Chem
Whew. long question. Barium carbonate is the source of barium compounds. It is produced in an aqueous precipitation reaction from barium sulfide and sodium carbonate. (Barium sulfide is a soluble compound obtained by heating the mineral barite, which is barium sulfate, with ...
Tuesday, October 28, 2008 at 12:02am by Anna-Marie

Chemistry
THE MOLAR MASS OF CALCIUM OXALATE,CaC2O4 IS 128G/MOLE. WHAT % OF CARBON IS CALCIUM OXALATE?
Thursday, July 24, 2008 at 8:11pm by Persia

chemistry
using the conversion of mass if the reactant has 4 atoms of calcium how many atoms of calcium will the product have?
Sunday, February 5, 2012 at 7:14pm by beth

chemistry
NaC2H3O2 = sodium acetate Na2CO3 = sodium carbonate NaHCO3 = sodium hydrogen carbonate
Monday, April 15, 2013 at 6:45am by DrBob222

chemistry
what are the errors in the double-indicator titration of (sodium carbonate and sodium hydrogen carbonate) against hydrochloric acid, using Phenolphthalein and Methyl orange as indicator? how can I improve the it?
Saturday, October 9, 2010 at 12:44am by kay

chemistry
what are the errors in the double-indicator titration of (sodium carbonate and sodium hydrogen carbonate) against hydrochloric acid, using Phenolphthalein and Methyl orange as indicator? how can I improve the it?
Wednesday, October 13, 2010 at 8:18am by kay

chem
Solid calcium hydroxide, Ca(OH)2, is dissolved in water until the pH of the solution is 10.23. What is the concentration of calcium ion [Ca 2+ ]?
Monday, February 25, 2013 at 5:56am by ston

chemistry
The solubility of nickel (II) carbonate at 25 degrees celsius is 0.042 g/L. Calculate Ksp for nickel (II) carbonate. thanks
Saturday, December 11, 2010 at 3:07pm by amy

more chemistry help and proofread
potassium sulfide i put KaS K is potassium and it is +1 while sulfide is -2; therefore, the formula is K2S. Tin (IV) chloride i put SnCl4 OK Dihydrogen sulfide i put H2SOK Calcium Oxide i put CaOOK Hydrobromic acid i put HBr OK Aluminum Fluoride i put AlF3 OK dinotrogen ...
Saturday, March 8, 2008 at 5:11pm by DrBob222

chemistry
How many grams of calcium chloride would you dissolve in water to make a total .111 M calcium chloride solution with 200 mL final volume?
Tuesday, July 13, 2010 at 4:30pm by fiath

statistic
00mg calcium 1200mg calcium effective 82 167 not effective 137 59 find the marginal frequency distributions regarding effectiveness.
Sunday, December 15, 2013 at 9:25pm by helen

chemistry
The solubility of nickel (II) carbonate at 25 degrees C is 0.047 g/L. Calculate Ksp for nickel (II) carbonate.
Monday, December 13, 2010 at 12:34am by joe

science
3. A section of the Periodic Table of the Elements is shown. Based on the positions of the elements, the two elements that have the most similar chemical properties are A. calcium and scandium B. calcium and titanium C. titanium and vanadium D. magnesium and calcium 4. One ...
Thursday, March 13, 2014 at 12:56pm by Anonymous

Chemistry
I've been studying the transesterification of dimethyl carbonate to diphenyl carbonate, and experimental equilibrium constant (K) values range from 0 to 0.5 at temperatures from 298 to 450 Kelvin. My question is: How do we make a reaction more spontaneous or how do increase K ...
Wednesday, August 29, 2012 at 12:03pm by Namie

chemistry
When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone formations, the limestone dissolves and caves are sometimes produced. CaCO3(s) + H2CO3(aq) Ca(HCO3)2(aq) What mass of limestone must have dissolved ...
Wednesday, February 3, 2010 at 6:44pm by u

chemistry
When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone formations, the limestone dissolves and caves are sometimes produced. CaCO3(s) + H2CO3(aq) Ca(HCO3)2(aq) What mass of limestone must have dissolved ...
Saturday, February 6, 2010 at 6:16pm by pr

chemistry
When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone formations, the limestone dissolves and caves are sometimes produced. CaCO3(s) + H2CO3(aq) Ca(HCO3)2(aq) What mass of limestone must have dissolved ...
Saturday, February 6, 2010 at 6:17pm by l

Chimestry
(The reaction of calcium hydride and water produces calcium hydroxide and hydrogen as products). How many moles of H_2(g) will be formed in the reaction between 0.90mol CaH_2(s) and 1.33mol H_2O(l)?
Tuesday, September 11, 2012 at 5:15pm by Inni

Statistics
A researcher wished to test the effect of the addition of extra calcium to yogurt on the "tastiness" of yogurt. Two different yogurts, one with extra calcium and one without the added calcium, were created from the same batch of yogurt. A group of 84 adult volunteers ...
Thursday, November 21, 2013 at 6:39pm by Samantha

college Chemistry
Write a balanced equation for the dissolution of sodium carbonate (Na2CO3) in water. Find the number of moles of Na+ produced when 0.318 mol of sodium carbonate dissolves. Answer in units of mol.
Saturday, January 24, 2009 at 12:35am by guy

chemistry
(i) calcium hydroxide, Ca(OH)2. (ii) calcium nitrate, Ca(NO3)2
Sunday, October 30, 2011 at 11:44am by DrBob222

chemistry
How do you find the molecular weight of hydrogen carbonate and the atomic weight of the unknown metal in the hydrogen carbonate?
Friday, October 7, 2011 at 1:46pm by Anonymous

Chemistry
One mole of each of the following compounds is added to water in separate flasks to make 1.0 L of solution. Which solution has the largest total ion concentration? a. aluminum hydroxide b. silver chloride c. sodium chloride d. calcium carbonate e. potassium phosphate I just ...
Monday, May 9, 2011 at 12:01am by Sam

Chem
1)Which cations should form soluble sulfate compounds from (Sodium, calcium, silver, copper 2)? 2) which anions should form precipitates with barium ions from (sulfate, carbonate and iodide?) 3) which anions should form precipitates with silver ions? Write net ionic equations ...
Tuesday, March 26, 2013 at 10:15pm by Katlyn

chemistry
4.0 g of sodium bicarbonate 84 g/mol) decomposes to form carbon dioxide, water, and sodium carbonate (106 g/mol). What is the theoretical yield in grams for sodium carbonate?
Thursday, January 26, 2012 at 6:35pm by Danae

chemistry
Your question, if read literally, doesn't make sense. I assume you want to know the formula for calcium chloride. It's CaCl2. Ca is +2 and Cl is -1. You want the compound to be zero (since compounds are neutral), so +2 for calcium + (2*-1 = -2) for Cl makes +2 + (-2) = 0.
Wednesday, September 30, 2009 at 2:08pm by DrBob222

Chemistry 22
Which one in this pair has the larger radius? Explain a. Calcium atom or calcium ion b. Aluminum ion or Magnesium ion
Sunday, December 12, 2010 at 3:01pm by Ivy

Chemistry
What is the silver ion concentration in a solution prepared by mixing 345 mL of 0.352 M silver nitrate with 443 mL of 0.511 M sodium carbonate? The Ksp of silver carbonate is 8.1 10-12
Monday, March 11, 2013 at 7:23pm by CP

health safety and nutrition
The mineral ____ and vitamins ____ and ____ regulate bone and tooth formation. A) calcium, K, E B) iron, A, D C) magnesium, C, B12 D) calcium, A, D
Saturday, March 12, 2011 at 12:22am by Anonymous

Chemistry
Which one in this pair has the larger radius? Explain a. Calcium atom or calcium ion b. Aluminum ion or Magnesium ion
Sunday, December 12, 2010 at 8:31pm by Ivy

Chemistry
Which one pair has the larger radius?Explain? a. Calcium atom or calcium ion b. Aluminum ion or Magnesium ion
Monday, December 13, 2010 at 2:19am by Anonymous

Chemistry 1
Sodium carbonate reacts with a solution of HCl solution with the evolution of gas (CO2) to yield a solution that is neutral. If 0.265 grams of sodium carbonate are required to neutralize 1.00 mL of HCl solution, what mass (in grams) of sodium carbonate will be required to ...
Friday, February 5, 2010 at 1:34pm by Kay

Chemistry
If a solution of sodium phosphate, Na3PO4, is poured into seawater, precipitates of calcium phosphate and magnesium phosphate are formed. (Magnesium and calcium ions are among the principle ions found in seawater.) Write net ionic reactions for the reactions. Include physical ...
Monday, June 27, 2011 at 10:13am by Emily

chemistry
Ammonium carbonate decomposes upon heating according to the following balanced equation: (NH4)2CO3(s)-->2 NH3(g)+CO2(g)+H2O(g) Calculate the total volume of gas produced at 25 C and 1.07atm by the complete decomposition of 11.86 g of ammonium carbonate.
Friday, April 16, 2010 at 4:12pm by jason

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