October 30, 2014

Search: "balanced equation for the reaction of the oxygen and the magnesium" including their physical states

Number of results: 44,796

New AP Chem Question for Dr. Bob
This is a Hess' Law problem. I think I got it but I'm hoping you could check it for me: Calculate the heat of reaction for changing 1 mol of silica, SiO2, that has been extracted from sand into the pure silicon that is needed to make computer chips. Use the following data: ...
January 23, 2007 by Belinda

The full inoic equation for an electrochemical cell is Br2 + Zn yields 2Br- + Zn2+. write the half reaction that occurs at the anode and the half reaction that occurs at the cathode
June 7, 2010 by Jessica

In a particular redox reaction, MnO2 is oxidized to MnO4 and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in acidic solution. Phases are optional. MnO2 + Cu^2+ ---> MnO4^- + Cu^+
May 4, 2014 by BOB

Chemistry 111
1. In the balanced oxidation-reduction reaction (occurring in acidic condition) the coefficients before H+ and Zn2+ are ____ and ____, respectively? Zn + NO3 → NH4+ + Zn2+ (unbalanced) A. 4, 2 B. 4, 1 C. 6, 1 D. 10, 4 E. 12, 2
December 2, 2011 by Danielle

In a case study where the maximal rates of oxygen consumption (in ml/s) for nine species of wild African mammals were plotted against body mass (in kg) in a log-log plot, it was found that the data points fell on a straight line with the slope approximately equal to 0.3 and ...
January 25, 2013 by Anonymous

In a case study where the maximal rates of oxygen consumption (in ml/s) for nine species of wild African mammals were plotted against body mass (in kg) in a log-log plot, it was found that the data points fell on a straight line with the slope approximately equal to 0.5 and ...
January 27, 2014 by Anonymous

social studies
The Articles of confederation were nto adopter for fives because: (A) the antifederalists waged a stiff battle against them (B) disputes continued over western lands (C) the large states and the small states could not agree on representation (D) the question of slavery divided...
March 25, 2010 by Mandy

A car moving at a speed of approximately 176.5 km/h. 923 m in front of the car, there is a truck moving at a speed of 84.2 km/h in the same direction. 1.What is the name of the physical process that would occur if both vehicles kept moving at constant speed? 2. How long would...
December 2, 2008 by Sandhya

AP Chemistry
Write the balanced molecular, complete ionic, and net ionic equations for the reactions that occur when the following are mixed. (Type your answer using the format [NH4]+ for NH4+ and [Ni(CN)4]2- for Ni(CN)42-. Use the lowest possible coefficients.) (a) solid silver hydroxide ...
September 24, 2011 by Rahul

Physical Science
In the equation length = t^2 * g/(2PI)^2, what do the symbols ^, *, and / represent?
September 23, 2007 by Beth

June 11, 2010 by JUDITH

Consider the following reaction. CH4(g) + 2 O2(g) CO2(g) + 2 H2O(l) H = -891 kJ Calculate the enthalpy change for each of the following cases. (a) 5.00 g methane is burned in excess oxygen.
October 31, 2010 by Anonymous

chemistry urgent
if 100 g of iron were reacted with 100 g of oxygen according to the reaction below, the maximum yield in grams of Fe2O3 would be: Dr. Bob. Please help.
November 30, 2010 by Lynn

oxygen will react with the metal copper it will also react with the nonmetallic compound butane (c4h10) which ofthese reactions is combustion reaction?explain your answer.
September 1, 2011 by lauren

1(a) when 25.0ml of 0.500 mol.dm3 H2SO4(AQ) SOLUTION IS added to 0.025dm3 of 1.00 moldm3 KOH SOLUTION , THE TEMPERATURE OF THE REACTION MIXTURE RISES FROM 23.50 CELCIUS TO 30.17 CELCIUS . THE SPECIFIC HEAT CAPACITY AND DENSITY OF WATER 4.20j.g.celcius and 1.00 the ...
February 9, 2012 by mustafe

I need help with these problems ASAP: I need help setting these problems up: pleas!! (1)Calculate the volume of 1.87 M NaI that would be needed to precipitate all of the Hg+2 ion from 199 mL of a 1.96 M Hg(NO3)2. The equation for the reaction is 2NaI (aq) + Hg(NO3)2 (aq) ---&...
July 20, 2010 by Priya

physical science
the attraction or pull of a person"s body toward the earth by the earth is called weight.the reaction to this force is the:
January 17, 2011 by kitsy

Chem 2
A mixture containing KCLO3, K2CO3, KHCO3, and KCL was heated, producing CO2, O2, and H2O (water) gases according to the following equations: 2KCLO3 -> 2KCL + O2 2KHCO3 -> K2O + H2O + 2CO2 K2CO3 -> K2O + CO2 The KCL does not reacnder the conditions of the reaction. If ...
September 13, 2007 by Pat

What type of reaction is involved in the making of Polypropylene? Would it be a synthesis reaction? The final step is a polymerization reaction. Before that, the propylene (C3H6) is made in a cracking reaction from heavier hydrocarbons. Thank you. :)
January 21, 2007 by Lisa

Chemistry HELP!
What is the translating word equation for water decomposes to form hydrogen oxygen gases?
March 11, 2008 by Student08

How many moles of glucose, C6H12O6, can be "burned" biologically when 10.0 mol of oxygen is available?
March 5, 2010 by meg

how do you write the chemical equation for liquid pentanol (C5H12O) and gaseous oxygen ? Thanks ~Samantha~
November 29, 2010 by Samantha

Trigonometry (Math)
Can someone help me simplify this equation? It needs to be ten characters or less, including signs, parenthesis, etc. If you could show me how you get there that would be great! Thanks!
May 9, 2012 by Brianna

Methanol, CH3OH, is produced on an industrial scale from carbon monoxide and hydrogen. At the temperatures used, gaseous methanol is formed according to the following thermochemical equation: CO(g)+ 2H2(g) <---> CH3OH(g) H = -90Kj 1. State Le Chateliers principle and ...
March 2, 2007 by Adam

4.745 eq. of magnesium will displace how many grams of silver from a silver nitrate solution? I have written the equation as follows: Mg + 2AgNO3 = Mg(NO3)2 + 2Ag I'm not sure how to proceed with converting the 4.745 eq. Any help would be appreciated.
November 28, 2010 by Jennifer

magnesium nitrate decompses in water and releases ammonia gas. If 355ml of ammonia is produced at STP, whit is the mass of Magnesim nitrate that reacted. Equation is Mg3N2+6H2O=3Mg(OH)2+2NH3
December 1, 2011 by George

Based on the balanced equation 2Ba + O2 → 2BaO calculate the number of BaO formula units formed when 54 Ba atoms and 21 O2 molecules react?
February 15, 2010 by Leslie

If 0.0490 mol of solid Al reacts stoichiometrically according to the balanced equation with 990 mL of aqueous Cl-, what molarity (M) of Cl- is required? 3 CuCl2(aq) + 2 Al(s) → 3 Cu + 2AlCl3(aq)
April 2, 2010 by eng

given the balanced equation: 2Al2O3(s)-->4Al(s)+302(g) What is the total number of moles of O2 that are produced when 8.0 mol of Al2O3(s)are totally decomposed ? please help me.
January 3, 2011 by Martin

Balanced equation: 2HCL+CaCO2>CaCl2+CO2+H2O what volume of 6.00 M HCL is needed to completely react with .750 moles of CaCO3
March 28, 2011 by patti

Balanced equation: 2HCL+CaCO2>CaCl2+CO2+H2O what volume of 6.00 M HCL is needed to completely react with .750 moles of CaCO3
March 28, 2011 by patti

Write a balanced net ionic equation for the oxidation of metallic copper to Cu(II) ion by hot concentrated H2SO4, in which the sulfur is reduced to SO2
June 29, 2011 by Abby

When 320.62 grams of Bi2O3 react with excess of C, how many moles of Bi form? I know I need to use stoichiometry, but I can't quite seem to get the correct balanced equation.
June 30, 2011 by Brooke

Write the balanced net ionic equation. Label species as solids liquids gase aqueous. HNO3(aq) + Ba(OH)2(aq) ---> I don't understand the steps? And how to balance it?
July 24, 2011 by Keith

Sodium-24, a beta-emitter used in diagnosing circulation problems, has a half-life of 15 hours.Write the balanced nuclear equation for this emission.
November 28, 2012 by Anonymous

Here's a molar heat problem I just have one question on. How much heat will be transferred if 2 moles of hydrogen reacts with excess oxygen according to the reaction below? 2H2 + O2 yields 2H20 + 572 kJ The answer according to my answer key is 2 mole H2 x 572 kJ/2moles H2. I ...
May 18, 2009 by Tabetha

The equilibrium constant Kc for the reaction C <--> D + E is 7.90 * 10^-5. The initial composition of the reaction mixture is [C]=[D]=[E]=1.10*10^-3. What is the equilibrium concentrations of C, D, and E? C=? D=? E=? chemistry - DrBob222, Monday, November 5, 2012 at 12:...
November 5, 2012 by Brunette

The activation energy of a certain reaction is 30.3 kJ/mol. At 20 C, the rate constant is 0.0130 s^{-1}. At what temperature would this reaction go twice as fast? Can't you use Arrhenius' equation for this. Look it up. You have Ea. you have T1. You have k1 and k2. That leaves ...
February 6, 2007 by kim

Hi, I am stuck on this question and would appreciate some guidance. The question states " The value of Kw decreases as the temperature decreases. Is the auto-ionization of water an exothermic or endothermic reaction in the forward direction?" I feel like the answer should be ...
May 31, 2013 by Charlotte

A voltaic cell is based on the reduction of Ag^+(aq) to Ag(s) and the oxidation of Sn(s) to SN^2+(aq). Write half-reactions for the cell's anode and cathode, and write a balanced cell reaction.
November 9, 2010 by Amanda

Calculate the pressure in an evacuated 250. mL container at 0.00 degrees C if 3.20 cm^3 of liquid oxygen evaporates. Assume that the liquid oxygen has a density of 1.118 g/cm^3 I understand that the density and volume can be used to find the mass in grams. However, I'm ...
May 7, 2012 by Lindsey

How much heat is given off when 24.0 g of methane is burned in air? The equation for the reaction is: CH4 + 2O2 => CO2 + 2H2O + 890 kJ What equation or formula should I use to solve this? Thanks!
March 29, 2010 by Lily

Chemistry answer check
What quantity of heat is required to produce 5 mol of oxygen gas by this reaction? HgO(s) → Hg(l) + O2(g), ΔH = +90.7kJ I calculated 90.7*5, but my online homework says its wrong how do I calcuate this?
June 25, 2013 by Mary

What is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? Assume that the contribution of protons from H2SO4 is near 100 %. Ba(OH)2(aq)+H2SO4(aq)→ Express your answer as a chemical equation. This is what ...
October 6, 2014 by Run

Balance each of the following skeletal equations by using oxidation and reduction half reactions. All the reactions take place in acidic solution. Identify the oxidizing agent and reducing agent in each reaction. (Use the lowest possible coefficients. Include states-of-matter ...
June 21, 2013 by Sara

cultural diversity
I posted this a couple of nights ago- and thought I would repost to let you know what my text states. 1. Hispanic,French,and Italian families commonly engage in hugging,patting,and behaviors of affectionate familiarity. These physical contacts characterize what kind of culture...
October 23, 2007 by Rose

What is a balanced equation for the formation of [Co(NH3)5Cl]2+ from [Co(NH3)5(OH2)]3+ ?
March 4, 2009 by Alice

what is the balanced equation for xenon gas reacting with fluorine gas?
September 12, 2011 by anonymous

For many years the recovery of gold-that is, the seperation of gold from other materials-involved the use of potassium cyanide: 4AU + 8KCN + 02 +2H20 -> 4KAu(CN)2 + 4KOH What is the minimum amount of KCN in moles needed to extract 29.0 g (about an ounce) of gold? Now my ...
August 2, 2010 by Kate

Volume of HCl, mL:26.5mL Volume of NaOH,mL:29.1mL Molarity of NaOH, mol/L:0.1m/L balanced equation: NaOh+HCl-->NaCl+H2O Using the above equation calculate the number of moles of acid required to react with 2.91 moles of base. Please help me I have no idea what to do.
May 28, 2012 by Gaby

What happens when : (give balanced chemical equations only) 1. Caustic soda reacts with carbon dioxide 2.caustic soda reacts with zinc hydroxide 3.potassium reacts with oxygen 4.sodium carbonate is fused with silicon dioxide 5. when bleaching powder reacts with hydrochloric acid
March 10, 2010 by paula

A 2.760 g sample of carbon was burned, yielding 10.120g of carbon dixode. How many grams of oxygen was taken up by the reaction? What ofrmula would I use to solve this problem?
September 27, 2007 by pat

Determine the percent yield for the reaction between 98.7g of Sb2S3 and excess oxygen gas if 72.4g Sb4O6 is recovered along with an unknown amount of sulfur dioxide gas.
March 7, 2008 by kate

prep chem
How many milliliters of oxygen 2(g) will be produced at 720mmHg and 17 celsius if 0.460 grams of KClO3 are reacted in the reaction? Formula is 2 KClO3 --> 2 KCl + 3 O2(g) I know to change temp into K
April 18, 2011 by Laura

4Al + 3O2 = 2Al2O3. If 41.5 g aluminum and 69.0 g oxygen undergo a reaction that has a 67.0% yield, What mass of aluminum oxide forms. Please help by showing steps to find answers. Thanks
July 17, 2011 by Pamela

a mixture of .0285g of H and .0141 mol of oxygen in a closed container is sparked to initiate a reaction. How many grams of H2O can form?Which reactant is in excess and how many grams remain?
September 28, 2011 by Tyler

phosphorus (12.28g) reacts with excess of oxygen gas to form 21.04 grams of diphosphorus penatoxide. what is the theoretical yile in grams of this reaction? im not sure how exactly do you start this?
December 11, 2011 by Skye

The combustion of 132 g of propane, C3H8, with excess oxygen liberates 6.6x10^3 kj of heat. What is the enthalpy change for the reaction below: C3H8(g) + 5O2(g) -> 3CO2(g) + 4H2O(l)
October 14, 2012 by Kay

How much heat (in {kJ}) evolves when 7.0L of C2H2(d = 1.0967kg/m^3) is mixed with a stoichiometric amount of oxygen gas? The combustion reaction is C2H2+ 5/2 O2-> 2 CO2+ H2O, Delta H=-1299.5 kJ
November 19, 2012 by Chironjit

A student mixed 50.0 mL of 0.50 M H2SO4 (aq) at 18.5 degrees C with 100 mL of 0.50 M NaOH (aq) at the same temperature. After the reaction was completed, the temperature rose to 22.0 degrees C. What was the heat of reaction? (Assuming the densities of the solutions are 1.00g/...
May 24, 2010 by Anonymous

Why is balanced chemical equation for H2O written 2H2+0>2H20 and not H20>H20?
September 21, 2009 by jo

ap chemistry
a potassium hydroxide solution is titrated with a solution of perchloric acid. what is the balanced equation?
December 31, 2010 by erin

When the following equation is balanced the coefficient of CaO is ... CaO + P4O10 > Ca3(PO4)2
March 10, 2011 by .

Is this equation correctly balanced? If not why. Al2S3+H2O----> Al2S3+3H2O---->Al2(SO)3+3H2
October 22, 2012 by What?

State whether each of the following will increase,decrease or unchange when catalyst is added to the reaction and give an explanation for your answer please a) rate of reaction b)activation energy c)reaction enthalpy d)equilibrium of reaction
July 9, 2011 by Gift

Please summarize this. I got it from a website and im doing my notecards. Im not trying to plagiarize, Im just not a science person. Please just summarize it so I can just understand it so I can explain it in my own words: The light reaction happens in the thylakoid membrane ...
October 14, 2013 by Losa

Physical science
Never found in nature uncombined? Alkali metals Alkaline Earth Metals Boron Family Carbon Family Nitrogen Family Oxygen Family Halogen Family Noble Gases
November 6, 2007 by liz

physical science
do not noramlly react with other elements? Alkali metals Alkaline Earth Metals Boron Family Carbon Family Nitrogen Family Oxygen Family Halogen Family Noble Gases
November 6, 2007 by liz

1. Aluminum reacts with oxygen to produce aluminum oxide which can be used as an adsorbent, desiccant or catalyst for organic reactions. 4Al(s) + 3O2(g) → 2Al2O3(s) A mixture of 82.49 g of aluminum ( Picture = 26.98 g/mol) and 117.65 g of oxygen ( Picture = 32.00 g/mol) ...
September 15, 2014 by Tim H

Using the balanced reaction, enter the formula, charge(if any), and state of the species (exclude H2O) in solution if Li3PO4(aq) reactant is present in stoichiometric excess. Separate your answers by comma. CrBr3(aq) + Li3PO4(aq) → CrPO4(s) + 3LiBr(aq)
February 18, 2010 by Larry

Using the balanced reaction, enter the formula, charge(if any), and state of the species (exclude H2O) in solution if ZnCl2(aq) reactant is present in stoichiometric excess. Separate your answers by comma. ZnCl2(aq) + K2CO3(aq) → ZnCO3(s) + 2KCl(aq)
February 18, 2010 by Josh

(11) Chemistry - Science (Dr. Bob222)
In the following hypothetical reaction A + B → C + D, the equilibrium constant, Keq is less than 1.0 at 25C and decreases by 35% on changing the temperature to 45C. What must be true according to this information? A. The ΔH for the reaction is negative. B. The...
May 7, 2014 by Ana

What can health care providers do to help promote physical activity initiatives? A. Absolutely nothing, they do enough B. Advise patients on physical activity and how they can do it safely C. Advise patients on how to avoid physical activity D. Advise patients on physical ...
April 3, 2012 by Destini

The correct interpretation of the equation below is: Fe3+(aq) + SCN(aq) --> and <-- FeSCN2+(aq) A. A heterogeneous equilibrium exists because of the charged ions. B. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. C. The ...
April 9, 2008 by Lindsey

The correct interpretation of the equation below is: Fe3+(aq) + SCN(aq) --> FeSCN2+(aq) A. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. B. The equilibrium constant is Kc = [Fe3+][SCN][FeSCN2+] C. A heterogeneous equilibrium ...
April 10, 2008 by Jerome

Algebra 1
Write an equation in slope-intercept form for a line that passes through the given point and is perpendicular to the given line. 1. y=3;(4,-2) The y = 3 line is parallel to the x axis so the perpendicular line you want is parallel to the y axis. That means x must be a constant...
January 7, 2007 by Mike

which is an example of physical change 1.water decomposing into hydrogen and oxygen 2.potassium and bromine combining to form potassium bromide 3.solid ice melting into liquid water 4.none of the above i think its 3.
November 28, 2010 by jessica

Please Help Me
Use the equation for the synthesis of hydrogen to answer the following. C (s) + H2O (l) -> CO (g) + H2 (g) deltaH = + 31.3 kcal/mol carbon deltaS = +32 cal/(molK) Calculate the energy change (deltaH) when 5.00 g of carbon is consumed. Calculate the energy change (deltaH) ...
February 19, 2013 by John

I am stumped on this one...Please help!!! Write a balanced base ionization reaction for methylamine (CH3NH2) in water. Identify all species as acids and bases and identify the conjuate acid-base pairs.
November 19, 2011 by Nathan

physical science
Balance this chemical equation. ___ K(s) + ___H2O(1) >>>>> KOH(aq) + H2(g)
January 5, 2011 by BDM

Physical Science
Balance this equation: I2+HNO3 = HIO3+NO2+H2O
February 22, 2012 by Hannah

If heat of combustion of acetylene C2H2 is -1301.1 kJ/mol then : a) Write balanced thermochemical equation of acetylene combustion b) If 0.25 mol C2H2 reacted according to the previous equation , and what is the emitted energy ? c) how many grams needed to give off 3900 kJ ...
July 14, 2014 by MAD

Gr 10 Chemistry
What is the balanced skeleton equation of Calcium hydroxide+ Phosphoric acid --> Calcium phosphate+ Water
November 9, 2008 by Pie

Express your answer as a balanced net ionic equation. Identify all of the phases in your answer
February 28, 2011 by libby

For the balanced equation shown below, how many moles of O2 will REACT with 0.6614 moles of NO? 2NO+O2 --> 2NO2
December 15, 2011 by SUPAMAN

What is the balanced equation of gaseous phosphorus pentachloride decomposed to chlorine gas and phosphorus trichloride.
April 8, 2012 by Allyson

Write a balanced equation for the formation of boehmite (ALO2H) from aluminium ions and hydroxide ions.
June 4, 2012 by Zen

25 litre bottle of oxygen in a hospital. If the bottle is at 12 atmospheres, what volume of oxygen is available to the patient? If the oxygen is stored at 4 degrees C and used at 20 degrees, what difference does this make? (Assuming start volume and pressure are still 25 ...
January 3, 2013 by Mac

Physical science
On a perfect day, you are hovering at low altitude in a hot-air balloon, accelerated neither upward or downward. The total wieght of the balloon, including its load and the hot air in it is 20,000N. Show that the volume of the displaced air is 1700 m3 (Hint:Buoyancy in a Gas)
February 24, 2008 by Rachel

Chemistry Question
Calculate the ∆G˚ for the oxidation of nickel in the following balanced reaction. 2[RhCl6]3-(aq)+ 3Ni a 2Rh(s) + 3NiCl2(aq) + 6Cl-(aq) E˚ for RhCl6 is 0.5V E˚ for Ni(s) is -0.25V
May 10, 2013 by Sandra

Assuming an efficiency of 38.60%, calculate the actual yield of magnesium nitrate formed from 145.9 g of magnesium and excess copper(II) nitrate. I got 230.5g but it isn't right.. I got 6 mols of Mg then calculated molar mass of Mg(NO3)2 and got 148.31 and then multiplied the ...
April 22, 2014 by Clare

Chemistry please help
104 ml of ethene, C2H4 is burned in 408 ml of oxygen, producing carbon dioxide and some liquid water. Some oxygen remain unreacted. Calculate the volume of carbon dioxide produced and the volume of oxygen remaining
September 11, 2014 by Anonymous

Social Studies
1) The four major kinds of natural vegetation in the United States and Canada are tundra, grassland, desert scrub, and a. permafrost. b. forest. c. swamp. d. all of the above 2) Why is mining important to the economy of the United States? a. It employs many workers. b. Gold is...
February 28, 2013 by Wendy

write the equation of the neutralization of sulfuric acid (H2SO4) with potassium hydroxide (KOH) and write the net ionic equation for the reaction
October 25, 2011 by Doss

1.Write an equilibrium constant equation for the following reaction: 4NH3(g)+5O2(g)= 4NO(g)+6H2O(g) 2. What does the above [] mean in the above equation?
April 10, 2013 by Yaneth

1.Write an equilibrium constant equation for the following reaction: 4NH3(g)+5O2(g)= 4NO(g)+6H2O(g) 2. What does the above [] mean in the above equation?
April 10, 2013 by Yaneth

How many grams of water can be made by the reaction of 1.25 grams of ethanol with 2.50 grams of oxygen?
April 8, 2010 by Lacy

Bill purchased 4 pens for $3.32, including $.16 sales tax. Find the cost of 1 pen. I need this put into an equation with a variable.
January 23, 2013 by John Rapolli

chemisty help
for the reaction shown, compute the theoretical yield of the product in grams for each of the following initial amounts of reactants. Ti + 2F2 to make TiF4 There are 3 sub questions for this. Help me out with one, then I'll try to figure out the rest. thanks a) 4.8g Ti; 3.2gF2...
March 1, 2007 by Becky

How would you go about solving an equation like this when all they give you is a equilibrium equation?: Given the standard free energies of formation in Appendix B in the textbook, what is the value of E ^\circ for the cell reaction?
June 21, 2012 by Claire

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