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April 17, 2014

Search: When copper(II) oxide is heated in the presence of hydrogen gas, elemental copper and water are produced. What mass of copper can be obtained if 21.5 g copper(II) oxide is used?

Number of results: 48,884

chemistry
When copper(II) oxide is heated in the presence of hydrogen gas, elemental copper and water are produced. What mass of copper can be obtained if 22.8 g copper(II) oxide is used?
Tuesday, January 25, 2011 at 4:37pm by nikki

Chemistry
When copper(II) oxide is heated in the presence of hydrogen gas, elemental copper and water are produced. What mass of copper can be obtained if 34.0 g copper(II) oxide is used?
Monday, February 24, 2014 at 3:26pm by Grace

Chemistry
ammonia gas reacts with copper (ii) oxide at high temperatures to produce elemental nitrogen, copper metal, and water vapor. Assume that 36.2g ammonia reacts with 180.8 g copper ii oxide. (balanced equation: 2 NH4 (ammonium) (g) + 4 CuO (copper ii oxide) ==> N2 (nitrogen ...
Tuesday, September 21, 2010 at 10:36pm by Jack

chemistry
when heated in the presence of air, 80 grms. of copper completely react to form 100 grms. of copper oxide what is the mass of oxygen that has combined with the copper? how much copper must be heated to form 300 grms. of copper oxide?
Friday, November 13, 2009 at 12:24am by abby

Chemistry
Copper metal reacts with dilute nitric acid in the absence of air. Which products are present? 1. copper (II) nitrate, nitrogen monoxide, and hydrogen gas 2. copper (I) nitrate, water and hydrogen gas 3. copper (II) nitrate, nitrogen monoxide and water 4. copper(I) nitrate and...
Saturday, January 30, 2010 at 1:42pm by Anonymous

science
It isn't the flame that is reacting with Cu. Its the air. The flame simply raises the temperature to make the reaction with oxygen of the air a little faster. copper + oxygen ==> copper oxide. You will have a little problem here (I would have a little problem, too) because ...
Monday, October 6, 2008 at 9:35pm by DrBob222

Chemistry 100 Lab
What will be the color of copper II oxide when heated in the presence of hydrogen?
Sunday, February 19, 2012 at 12:18am by Boyet

chemistry
Write word equations for the following chemical reactions. a. Pure copper can be produced by heating copper(II) sulfide in the presence of diatomic oxygen from the air. Sulfur dioxide gas is also produced in this reaction. b. Water is formed by the explosive reaction between ...
Thursday, January 6, 2011 at 9:04am by sec 8.1

chemistry
Write Skeleton equations for these reactions. A) Heating Copper(II) sulfide in the Presence of diatomic oxygen produces pure copper and sulfur dioxide gas. B)When heated, baking soda (Sodium hydrogen carbonate) decomposes to form the products sodium carbonate, carbon dioxide, ...
Sunday, February 28, 2010 at 6:34pm by Jack

chemistry
there are 2 reactants copper(II) oxide and hydrochloric acid the products are copper(II)chloride and water. what change will you observe in the copper(II)oxide? was there a change in solubility? where is the copper(II)chloride? how can you tell
Monday, October 10, 2011 at 5:00pm by dianne

chemistry.
A student was asked to make some copper(II) sulfate-5-5 (CuSO4.5(H2O) BY reacting copper(II) oxide (CuO) with sulfuric acid. a) Calculate the molar mass of the copper (II) sulfate-5-water which is (64+32+64) + (10+80)=250 mol b)Calculate the amount (in mol) of copper (II) ...
Saturday, October 24, 2009 at 6:17am by Denmark

chemistry
Some distilled water is added to an empty beaker. A gram of copper(II) nitrate is added to the beaker with stirring. After a few minutes, what is in the beaker? a. solid copper(II) nitrate and water b. nitrogen gas, copper atoms, electrons, and water c. a sticky material of ...
Friday, January 28, 2011 at 7:27pm by john

Chemistry
Copper dissolves in nitric acid, producing copper (ll) nitrate. After reaction with sodium hydroxide and heating, copper nitrate changes to copper (ll) oxide. Calculate the percent yield of this process if 1.235 g of copper produced 1.452 g of copper oxide.
Sunday, October 28, 2007 at 6:48pm by Raj

college chem
two reactants are copper(II)chloride and water what change would you observe in the copper(II)oxide. was there a change in solubility? where is the copper(II) chloride? how can you tell
Sunday, October 9, 2011 at 12:21pm by dianne

Science
1. Rewrite the word equation as formula equation: Aluminum + copper (II) chloride= aluminum chloride + copper 2. What is not equal in these chemical formula equations: a.) magnesium + oxygen = magnesium oxide B.) water = hydrogen + oxygen c.)methanol +oxygen = carbon dioxide...
Sunday, March 30, 2014 at 8:01pm by Madhu

science
Based on the reactivity series, decide whether the following reaction will occur. If you think there will be no reaction, write down why you think this. If you think a reaction will happen, write down why you think it will happen, and the word equation to go with it. a) iron ...
Monday, June 27, 2011 at 10:32am by ishaan

Chemistry
Ik this has been answered, but doesn't the copper oxide have something to do with it? And could you explain it in simpler terms? I'm just confused because you said forget the copper oxide, but your using it somehow, what puzzles me is the carbon dioxide, because the copper ...
Sunday, February 23, 2014 at 6:14pm by Harry

Science
1.0 g of copper was heated in a crucible, while stirring, and .2g of unreacted copper was recovered usoing hydrochloric acid as a solvent, how much copper would precipitate when zinc is later added to the copper oxide/acid solution?
Wednesday, March 13, 2013 at 10:03pm by R Johnson

Chemistry
Give the formula of each of the following copper minerals: A. cuprite, copper (I) oxide B. chalcocite, copper (I) sulfide C. covellite, copper (II) sulfide
Monday, January 23, 2012 at 5:57pm by Tiffany

college chemistry
Copper(II) sulfide reacts with oxygen to produce copper (II) oxide plus sulfur dioxide. Suppose you start this reaction with 50.0 grams of copper(II) sulfide and 50.0 grams of oxygen and you actually produce 33.5 grams of copper(II) oxide. Calculate the percent yield for the ...
Wednesday, March 5, 2014 at 5:13pm by steven

Chemistry
A 1.250 g sample of copper wire was heated in air and reacted with oxygen to give 1.565 g of copper oxide product. Calculate the empirical formula of the copper oxide. Please help I'm lost. I need step by step Please and thank you
Wednesday, September 21, 2011 at 9:53pm by Monique

chemistry
Copper(II) sulfide reacts with oxygen to produce copper (II) oxide plus sulfur dioxide. Suppose you start this reaction with 50.0 grams of copper(II) sulfide and 50.0 grams of oxygen and you actually produce 33.5 grams of copper(II) oxide. Calculate the percent yield for the ...
Wednesday, March 5, 2014 at 5:12pm by steven

Grade 10 Science
Iron can exist as either a divalent or trivalent cation. There's the Fe2+ and Fe3+ cations. The (II) refers to the valency of the Iron cation. Since it's the 2+ cation, then it's called Iron (II) Sulphide. If it was the Iron 3+ cation, for example in Iron oxide (rust) aka ...
Tuesday, February 15, 2011 at 8:42pm by Qpee

chemistry
one reaction was between the aluminum and the leftover hydrochloric acid the products are aluminum chloride and hydrogen gas. the other reaction was the aluminum and the copper(II)chloride.. this produced aluminum chloride and copper metal. what was the evidence that hydrogen ...
Monday, October 10, 2011 at 5:07pm by dianne

Science (chemistry)
Write a balanced chemical equation and state the reaction type for each of the following reactions: a.) nitrogen gas reacts with hydrogen gas forming ammonia (NH3) b.) carbonic acid breaks down to form carbon dioxide gas and water c.) aluminum foil reacts with copper II ...
Wednesday, April 2, 2014 at 11:41pm by Anonymous

chemistry
Name a reagent that will react with a) copper(II)hydrooxide and aluminium hydroxide b)aluminium hydroxide but not copper(II)hydroxide 2)suggest how you could seperate a mixture of silicon(IV) oxide and magnesium oxide 3)Name a reagent that could react with both zinc and copper...
Saturday, September 17, 2011 at 6:26am by sahar

chemistry
A 6.25 gram sample of copper(II) chloride hydrate was heated until all the water was liberated. The residue massed 4.45 grams. How many water molecules are present for every formula unit of copper(II) chloride?
Tuesday, September 24, 2013 at 3:17am by Peytreshia

chemistry
Tammy is incorrect with that answer. The correct answer is that the Roman numeral is the oxidation state of the cation. For example, in CuSO4 it is copper(II) sulfate. The old name was cupric sulfate. Another example. Cu2O is copper(I) oxide. CuO is copper(II) oxide. FeSO4 is ...
Sunday, October 25, 2009 at 6:56pm by DrBob222

chemistry
a bottle of copper(II)oxide has been contaminated with solid sodium chloride, how can the sodium chloride be removed? Copper oxide is totally insoluble in water. The NaCl could therefore be rinsed away. ok.
Friday, December 22, 2006 at 4:21am by holly

Science!
CuCO3 + O2 -> CuO + CO2 hydrogen peroxide + manganese dioxide -> hydrogen + oxygen copper (II) sulfate pentahydrate + oxygen -> copper oxide + sulfur trioxide + dihydrogen monoxide What are the balanced queations for these?
Monday, September 28, 2009 at 6:59am by Lauren

Chemistry
It's sometimes a combination of looking at the name and looking at the position in the periodic chart. For example, for copper oxide, it must be copper(II) oxide or copper(I) oxide. Look at oxygen in the table, it is in group VIA (or 16 depending upon the system you are using...
Monday, October 29, 2007 at 3:25pm by DrBob222

Science (Chemistry)
I did not understand the lesson today in my Chemistry I honors class. We went over the Law of Conservation of Mass for roughly 15 minutes and he gave us this worksheet. Could someone please display how to do this, I'll pull a problem from the worksheet. When 9.56g of Copper ...
Wednesday, October 7, 2009 at 10:35pm by Michael Glass

Chemistry
A 2.612 g sample of a copper oxide, when heated in a stream of H2 gas, yields .592 g H20. What is the formula of the copper oxide? Again, I need help with this problem. Answer = CuO Ok nvm.. i got it. Set up the reaction as best we can surmise at the moment. CxOy + H2 ---> ...
Thursday, August 25, 2005 at 10:59am by Laura

chemistry
write a net ionic equation for the following: Copper (II) sulfate reacts with Ammonium hydroxide to produce Copper (II) oxide, Ammonium sulfate, and water.
Tuesday, October 26, 2010 at 7:15pm by rachel

Chemistry
The theoretical percent of Copper (II)Oxide is 79.9%. What are two reasons why the percent of Copper in Copper (II) may vary from 79.9%
Monday, March 17, 2008 at 9:49pm by Shaun

CHEMISTRY
how many grams of copper (II) Chloride are formed in the double replascement reaction of 1.1 g copper (II) oxide and excess hydrochloric acid?
Sunday, July 11, 2010 at 10:05pm by maleia

Chemistry
A 110.-g sample of copper (specific heat capacity = 0.20 J/°C · g) is heated to 82.4°C and then placed in a container of water at 22.3°C. The final temperature of the water and copper is 23.5°C. What is the mass of the water in the container, assuming that all the heat lost by...
Monday, July 11, 2011 at 1:16pm by Brittney

chem
which of these substances dissolve in water? and are they elements or compounds? copper nitrate sodium hydroxide copper hydroxide copper oxide hydrochloric acid aluminum copper chloride hydrochloric acid
Monday, October 8, 2007 at 9:39pm by Sar

Science
Copper Oxide + Carbon -> Copper + Carbon Dioxide Calculate the mass of carbon needed to obtain 63.5g of copper from 79.5g of Copper Oxide
Sunday, February 23, 2014 at 5:43pm by Harry

Science
Copper Oxide + Carbon -> Copper + Carbon Dioxide Calculate the mass of carbon needed to obtain 63.5g of copper from 79.5g of Copper Oxide
Sunday, February 23, 2014 at 5:43pm by Harry

Chemistry
Can you tell me if these are right please? When 2.50g of copper reacts with oxygen the copper oxide product has a mass of 2.81g. What is the simplest formula of the copper oxide. I got Cu2O (copper (I) oxide). Aluminum and oxygen gas react to produce aluminum oxide. A.) write ...
Tuesday, October 19, 2010 at 12:04pm by Jason

chemistry
1. What happened to the hydrogen gas generated in the last reaction? Add hydrogen gas to the cycle. 2. What happened to the aluminum? 3. Why was it important to wash the CuO? 4. What other metals can be easily recycled? we experiment for recyclying a copper using a copper ...
Thursday, March 8, 2012 at 7:07pm by jhong

science
How do i seperate the mixture of zinc oxide and copper oxide to obtain pure copper oxide
Friday, August 30, 2013 at 4:07am by myke

Chemistry
Copper metal reacts with hot concentrated sulfuric acid solution to form aqueous copper (II) sulfate, sulfur dioxide gas and water. What type of reaction is this?
Sunday, August 21, 2011 at 11:46am by Joe Schmo

Chemistry help
Cupper (II) sulfate reacts with hydrogen iodide to produce copper iodide, sulfuric acid, and iodine gas. If 10.4g of copper (II) sulfate is used, calculate the number of grams of HI needed and the number of grams of each product produced.
Wednesday, November 10, 2010 at 8:47pm by Mütze

chemistry HELP
A 46.2 gram sample of copper is heated to 95.4 degrees celcius and then place into a calorimeter containing 75.0 grams of water at 19.6 degrees celcius. The final temp of the water and copper is 21.8 degrees celcius. Calculate the specific heat capacity of copper, assuming all...
Friday, January 2, 2009 at 7:52pm by lyne

physical
Specific Heat. Copper has a specific heat of 0.092 cal/g/deg C. A 75 gram copper mass has been heated to a temperature of 100 degrees C. The copper is placed in thermal contact with 50 grams of water at 25 degrees C. What will be the final equilibrium temperature of the copper...
Saturday, November 23, 2013 at 11:56am by Anonymous

Chemistry
Sorry! Here it is: "Copper metal is reacted with concentrated nitric acid to form copper(II)nitrate in solution. Water and nitrogen dioxide gas are also produced in the reaction." "What is the concentration of the excess reagent?"
Thursday, February 4, 2010 at 10:53pm by Stuck

Chemistry
I am not sure if I understand how to balance this correctly. I need to write a balanced equation for the decomposition of solid copper(ii) sulfate to form gaseous sulfur trioxide and solid copper (ii) oxide. 2CuSO7 = CuSO4 + SO3 + CuO
Tuesday, April 8, 2014 at 1:33am by david

Science
What does copper react with when heated and what is formed as a result? (When you put copper underneath a fire, would the copper be reacting with oxygen or carbon dioxide?)
Monday, September 1, 2008 at 11:23pm by Jerry

Chemistry
What weight of copper(II) oxide, CuO, would theoretically be produced from 1.623 grams of copper? (mol. masses Cu = 63.55; O = 16.00)
Wednesday, September 22, 2010 at 11:17am by Marie

Chemistry
What weight of copper(II) oxide, CuO, would theoretically be produced from 1.623 grams of copper? (mol. masses Cu = 63.55; O = 16.00)
Wednesday, September 22, 2010 at 11:18am by Marie

physicss
A 0.190 kg piece of copper is heated and fashioned into a bracelet. The amount of energy transferred as heat to the copper is 6.62 x 10^4 J. If the specific heat of copper is 387 J/kg x °C, what is the change in temp of the copper?
Sunday, November 1, 2009 at 7:17pm by arriell

phys
A 0.190 kg piece of copper is heated and fashioned into a bracelet. The amount of energy transferred as heat to the copper is 6.62 x 10^4 J. If the specific heat of copper is 387 J/kg x °C, what is the change in temp of the copper?
Monday, November 2, 2009 at 7:17pm by abbigail

chem.
Sodium metal is insoluble in ether - No change but technically you can call the sodium in ether an insoluble mixture and therefore a physical change. Sodium metal dissolves in water to produce a gas - You get a chemical change happening here because the sodium reacts with the ...
Wednesday, February 16, 2011 at 5:45pm by Qpee

Chemistry
a coffee cup calorimeter normally consists of two nested styrofoam cups with a lid. a coffee cup calorimeter of this type contains 125.0 g of water at 20.00 degrees C. A 120.0 g sample of copper metal is heated to 98.0 degrees C by putting it into a beaker of hot water. The ...
Wednesday, November 30, 2011 at 12:44pm by Julia

Science
Calculate the mass percent of sand, sodium chloride and copper (II) sulfate in a sample which yields the following data: mass of sample = 1.088g, mass of sand = 0.2255g, mass of copper (II) oxide = 0.1994g (assume 100% yield for each of the copper (II) reactions). The ...
Monday, October 17, 2011 at 2:38am by Shangkary

chemistry
Does copper rust in the presence of water? No. In the olden days wooden ships were coated with copper metal to prevent wood borers and increase speed.
Monday, January 15, 2007 at 12:49pm by sam

Chemistry
Please help!:( What mass of copper would be produced by the reduction of copper(II) ions during pas- sage of 1 ampere of current through a solution of copper(II) sulfate for 89 minutes?
Sunday, April 21, 2013 at 12:20pm by Steven Gomez

chemistry
pure zinc metal into a solution of copper(II) sulfate, the zinc will slowly dissolve to produce zinc sulfate solution, and the copper(II) ion of the copper(II) sulfate will be converted to metallic copper. Write the unbalanced equation for this process. (Include states-of-...
Saturday, October 2, 2010 at 9:54am by astoeck

Chemistry
1. KBr: Potassium Bromide 2. Cu2O: Copper (I) Oxide 3. HCl: Hydrochloric Acid Tehncially, this is a gas and is called hydrogen chloride as a gas. If it is in aqueous solution, then it is HCl(aq), hydrochloric acid. Many people, including professional chemists, interchange ...
Wednesday, January 12, 2011 at 1:30pm by DrBob222

CHEMISTRY
A chemist is producing copper(II) chloride using the following reaction: Cu(s) + Cl2(g) --> CuCl2(s) In one reaction, the chemist uses 15.0 g of copper metal and 10.0 g of chlorine gas as reactants. When the reaction reaches completion, 16.0 g of copper(II) chloride has ...
Monday, August 31, 2009 at 10:14pm by Mercedes

Chemistry
A chemist is producing copper(II) chloride using the following reaction: Cu(s) + Cl2(g) --> CuCl2(s) In one reaction, the chemist uses 15.0 g of copper metal and 10.0 g of chlorine gas as reactants. When the reaction reaches completion, 16.0 g of copper(II) chloride has ...
Tuesday, September 1, 2009 at 12:12am by Mercedes

AP Chem
a 4.22 gram sample of copper II sulfide was added to excess hydrocholoric acid with hydrogen sulfide gas being generated and collected over water. What volume of hydrogen sulfide gas would be collected at 32 degrees Celcius and 749 torr? The vapor pressure of water at 32 ...
Tuesday, December 11, 2007 at 9:13pm by Susan Shoemaker

science
Can you help me balance some equations? I tried and failed several times... 1. calcium hydroxide + phosphoric acid yield calcium phosphate + water 2. copper + sulfuric acid yield copper(II) Sulfate + water + sulfur dioxide 3. hydrogen + nitrogen monoxide yield water + nitrogen...
Tuesday, November 10, 2009 at 11:01pm by Jessi

AP Chem
There are two reactions here. 1) Strontium is an active metal what will react with water, forming Strontium hydroxide (aq), and releasing hydrogen gas in the form of bubbles. Sr + 2H+ + 2OH- >> Sr++ + 2OH- + H2 (g) 2) The second reaction is that Strontium will replace ...
Wednesday, October 3, 2007 at 5:46pm by bobpursley

CHEMISTRY
HOW DO YOU BALANCE THE FOLLOWIN CHEMICAL REACTIO??? When,heated solid iron reacts with solution of copper(II)sulfate to yield aqueous iron(II)sulfate and solid copper metal?
Wednesday, January 12, 2011 at 7:25pm by 10TH GARDE

science-this is urgent, plz help me! its easy too.
You need to be somewhat more specific about your experiment. There IS no gas produced, or at last there should not be, when steel wool (iron) and copper(II) solution are mixed. The rusty color you see is due to the iron going in to solution (forming iron(II) ions) while copper...
Sunday, October 14, 2007 at 8:43pm by DrBob222

Chemistry
Obviously this is an exercise in helping you become familiar with the formulas of compounds. Here is the first one. Just let the words tell you what to do. HCl + 3NaHCO3 ==> Na2CO3 + 2H2O + 2CO2 + NaCl There are two copper oxides. I don't know which you want. One is CuO, ...
Tuesday, March 9, 2010 at 2:55pm by DrBob222

Chemisty
The compound copper(II) nitrate is a strong electrolyte. Write the reaction when copper(II) nitrate is put into water
Sunday, January 22, 2012 at 11:11pm by love

chemistry
consider the reaction between copper metal and chlorine gas producing solid copper(1) chloride. when 16.2g of copper is reacted in an excess of chlorine, how many grams of copper(1) chloride will be produced
Saturday, April 28, 2012 at 2:26pm by janice

science
bornite(Cu3FeS3)is copper ore used in the production of copper.when heated,the following reaction occurs.2CuFeS3(s)+7oxygen(g)=6Cu(s)+2FeO(s)+6SO2(g)..IF 3.88 metric tons of bornite is reacted with excess oxygen and the process has 75.6 percent yield of copper,what mass of ...
Monday, June 13, 2011 at 6:11am by mushibwe lameck c

Chemistry
Determine the percent by mass of water in your sample of hydrated copper (II) sulfate. Mass of water = 0.95 g Mass of anhydrous copper sulfate = 2.19 g Mass of hydrate copper sulfate = 3.14 g
Saturday, November 24, 2012 at 10:01pm by A.

chemistry
Some might complain that b should be called copper(II) bromide (and no one will argue with that name) but I would give you credit for the copper dibromide answer. In other words, all will accept copper(II) bromide while some (perhaps even most) will accept copper dibromide.
Monday, February 6, 2012 at 1:10pm by DrBob222

Chemistry
In the experiment 0.500 g of copper reacted with oxygen to give 0.563 g of copper oxide. What is the empirical formula of the oxide expressed as a chemical formula?
Wednesday, October 24, 2012 at 5:35pm by Brenda

Chemistry
Expected number of moles of copper oxide (using the emprical formula of copper oxide and the starting moles of Cu)
Sunday, September 15, 2013 at 11:21pm by kelly

chem
A student determines the composition of a copper chloride compound. Tell whether each of the situations described below would cause the student’s experimental value for the percent of copper in the compound to be greater than less than, or unchanged from the theoretical value...
Sunday, March 2, 2014 at 7:00pm by Anonymous

chemistry
suppose you have an unlimited supply of copper (II) chloride to react with iron. How many moles of copper would be produced by reacting 34 grams of iron with the copper(II) chloride solution?
Friday, October 29, 2010 at 1:33am by sarah

Physics
A 150g piece of copper is heated to 100oC. It is then held in the open air for 2 minutes and 31 seconds, and then dropped into a 100g copper calorimeter containing 200g of water at 17oC. If the rate of loss of heat of the copper piece while held in the air is 12.6J/sec, ...
Tuesday, March 25, 2014 at 8:34pm by Mike

Chemistry
A 522g piece of copper tubing is heated to 89.5C and placed in an insulated vessel containing 159g of water at 22.8C. Assuming no loss of water and a heat capacity for the vessel of 10.0J/K, what is the final temperature of the system ( c of copper = 0.387 J/g*K)?
Tuesday, November 11, 2008 at 7:38pm by Ray

chemistry
a 506g piece of copper tubing is heated to 89.5C and placed in an insulated vessel containing 159g of water at 22.8C. Assuming no loss of water and a heat capacity for the vessel of 10.0J/K, what is the final temperature of the system (c of copper = 0.387 J/g*K)?
Saturday, November 15, 2008 at 6:44pm by carl

Chemistry
If a 0.192 g sample of copper metal reacts with elemental sulfur to form 0.240 g of the sulfide product, (a) find the percent by mass of copper and sulfur in the product and (b) find the empirical formula of the copper sulfide
Monday, February 24, 2014 at 4:32pm by danielle

chemistry
copper compounds such as copper (II) sulfate are toxic. before disposal, these compounds must be treated to reduce their toxicity. describe how to use steel wool to remove the Cu 2+ ions from an aqueous solution of copper (II) sulfate
Thursday, March 7, 2013 at 7:27pm by Josh

Science!
drwls is correct about the first equation CuCO3 -> CuO + CO2 In the second equation the manganese dioxide is a catalyst and so does not appear on either side. The products of the reaction are H2O (water but also known as dihydrogen monoxide) and oxygen You would need to ...
Monday, September 28, 2009 at 6:59am by Dr Russ

Science/chemistry
Those are the two COMMON oxidation states. What are the charges of the two ions of copper? +1 and +2. Copper(I) and copper(II). cuprous and cupric.
Thursday, January 4, 2007 at 8:35pm by DrBob222

chemistry
Bornite (Cu3FeS3) is a copper ore used in the production of copper. When heated, the following reaction occurs. 2 Cu3FeS3(s) + 7 O2(g) 6 Cu(s) + 2 FeO(s) + 6 SO2(g) If 3.88 metric tons of bornite is reacted with excess O2 and the process has an 75.6% yield of copper, what mass...
Wednesday, September 9, 2009 at 10:03am by grant

Chemistry
How many grams of copper are produced when excess aluminum reacts with 11.6g of copper oxide?
Tuesday, April 26, 2011 at 12:19pm by Melissa

Chemistry
Copper metal can be obtained by heating copper oxide in the presence of carbon monoxide, CO, according to the reaction: CuO(s) + CO(g) --> Cu(s) + CO2(g) Calculate Delta H° in kJ using the following thermochemical equations. Reactions 2CO(g) + O2(g) --> 2CO2(g) DeltaH° -...
Wednesday, October 13, 2010 at 8:05pm by Jordin

Chemistry
Well, Benedict's test detects reducing sugars (such as glucose). Benedict's reagent contains blue copper ions (Cu2+) which are reduced to copper (Cu+) in the presence of reducing sugars. These are precipitated as red copper(I) oxide which is insoluble in water. The color of ...
Tuesday, March 30, 2010 at 3:55am by coco

science
what is produced when copper sulphate solution is mixed with ammonia solution? Either copper(II) hydroxide or copper(II) ammine sulfate or both depending upon the strength and the amount of ammonia added. The first is Cu(OH)2, the second is Cu(NH3)4SO4
Thursday, January 18, 2007 at 3:18pm by anon

Chemistry
so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements? ex. P02 the P for Phosphorus doesn't have a number does it mean it is a one then ex.SO3 ex....
Sunday, February 16, 2014 at 1:38pm by Sam

chemistry
5. copper(II)hydroxide + phosphoric acid ---> double replacement - you get copper phosphate and water Shouldnt this one be single replacement?
Tuesday, September 23, 2008 at 12:02am by Hmm

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 check and help
so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements? ex. P02 the P for Phosphorus doesn't have a number does it mean it is a one then ex.SO3 ex....
Sunday, February 16, 2014 at 7:45pm by Sam

Chemistry
True or False? a) wet metallic copper can be rinsed with acetone to help any remaining cation to metal reduction occur b)copper metal is readily oxidized by nitric acid to yield copper(II) nitrate
Saturday, October 18, 2008 at 12:49am by Anonymous

chemistry
if you react one mole of sodium hyrdoxide with excess copper(II) sulfate, how many moles of copper(II) hydroxid are produced?
Wednesday, February 16, 2011 at 4:20pm by valentina

chem- ion
naming chemical compounds. I don't really get how you get the symbol from the word or the other way around for polyotomic ions so.. here are some examples that a website gave me: this is wut the site said to do:(Its confusing to me) The name of the compound should have a roman...
Tuesday, October 19, 2010 at 4:30pm by claire

chemistry
When you have an element with different ions, you have to specify with Roman numerals which ion you're using when naming it. Copper has multiple charges, so you will have to specify which ion of copper you're using: Cu^+ is copper(I) and Cu^2+ is copper(II) copper(I) has a ...
Thursday, September 22, 2011 at 8:46pm by Cadavz

Chemistry
Write the word equations below as chemical equations and balance. copper + sulfuric acid yield copper(II) sulfate+ water + sulfur dioxide
Wednesday, December 1, 2010 at 8:27pm by Pedro

physics
A 52.0 g ball of copper has a net charge of 2.1 µC. What fraction of the copper's electrons have been removed? (Each copper atom has 29 protons, and copper has an atomic mass of 63.5.)
Sunday, January 27, 2013 at 5:39pm by taryn

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