Monday
April 21, 2014

# Search: Magnesium reacts with oxygen to form magnesium oxide. If 0.81 grams of magnesium oxide are formed, how many grams of oxygen reacted?

Number of results: 7,004

chemistry
What would be the mass of a bag of anhydrous magnesium sulfate, MgSO4, if it contained the same amount of magnesium as a 1.00kg bag of Epsom salts, MgSO4 x 7H2O? Give your answer in grams. please help
Monday, April 11, 2011 at 7:03pm by Jess

Chemistry
A 28.4288 g sample of impure magnesium car- bonate 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 16.0467 g. Assum- ing...
Friday, September 21, 2012 at 7:29pm by Brett

Chemistry
Gasohol contains ethanol (C2H4OH)(l), which when burned reacts with oxygen to produce CO2(g) and H2O(g). How much heat is released when 12.5g of ethanol burns? C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 3H2O(l) Delta H = -1368kJ How do I solve this problem?
Wednesday, May 19, 2010 at 10:44pm by Kieth

chemistry
Hi, how many moles does 0.225g of oxygen atoms represent? If 1 mole of oxygen atoms represents 16.0g? Thanks mols = grams/molar mass. thot so. Thanks for confirming ;) This is right for oxygen atoms, however, oxygen in the atmosphere is O2, and we normally think of a mole of ...
Monday, February 5, 2007 at 3:33pm by bertie

Chemistry quick question
For the following write the chemical formulas for the reactants and predict the most likely reaction type , then write balanced equations for each: A.) magnesium chloride is heated b.) silver nitrate is reacted with sodium sulfide c.) methanol is burned in the presence of ...
Wednesday, April 2, 2014 at 11:43pm by Anonymous

General Chem
Nitrogen oxide reacts with oxygen gas to form nitrogen dioxide (NO2). In one experiment 0.866 mole of NO is mixed with 0.503 mole of O2. Calculate the number of moles of NO2 produced
Friday, October 12, 2012 at 12:56pm by Alexis

chemistry
Its the oxygen reacting with silver, not air; therefore, I think I would get the oxygen out of the air first. If the air is that percent oxygen, I think I would multiply 50.0 L air x 0.209476 = ?? L oxygen. Convert L oxygen to mols oxygen and go from there. Ag + O2 ==> Ag2O...
Friday, November 7, 2008 at 11:34pm by DrBob222

General Chemistry
Change these word equations into formula equations and balance them. Be sure to use the proper symbols to indicate the state of each substance as given. (a) Magnesium metal is placed into hydrobromic acid solution, forming hydrogen gas and aqueous magnesium bromide. (b) When ...
Wednesday, October 3, 2012 at 10:11am by Anonymous

chemistry
Upon decomposition, one sample of magnesium fluoride produced 1.65 kg{\rm kg} of magnesium and 2.58 kg{\rm kg} of fluorine. A second sample produced 1.50 kg{\rm kg} of magnesium. How much fluorine (in grams) did the second sample produce?
Thursday, March 27, 2014 at 9:20pm by skittles

Chemistry
10. Cyclopropane is an anesthetic that is 85.6% carbon and 14.37% hydrogen by mass. What is the molecular formula of the compound if 0.45 L of cyclopropane reacts with excess oxygen at 120. °C and 0.72 atm to form a 1.35L of carbon dioxide and 1.35 L of water vapor?
Wednesday, January 26, 2011 at 2:54am by Cherie

chemistry
2Hg+O2=2HgO if 50.0 grams of mercury reacts with 50.0 grams of oxygen gas, how many grams of mercury(ii)oxide are produced?
Friday, February 14, 2014 at 2:23am by mom

Chemistry
Fluorine reacts with oxygen to yield oxygen difluoride. 2 F2(g) + O2(g)<--> 2 OF2(g) What is the value of K if the following concentrations are found at equilibrium: [O2]= 0.200 mol/L, [F2]=0.0100 mol/L, and [OF2]=0.0633 mol/L Chemistry - DrBob222, Thursday, March 1, ...
Friday, March 2, 2012 at 12:16am by Sally

chemistry
Air consits of 21% oxygen, 78% nitrogen and 1% argon by volume. Calculate the partial pressures in Pa if total pressure is 1 atm. My teacher just converted 1atm in pa and then did 21% of that for oxygen etc etc. Can you explain why she did this, is volume directly proportional...
Thursday, August 11, 2011 at 6:04am by sam

science
q = mass oxygen x heat vap Use density to convert volume oxygen to mass oxygen.
Monday, February 27, 2012 at 2:18pm by DrBob222

chemistry
The mole fraction of an aqueous solution of magnesium chlorate is 0.371. Calculate the molarity (in mol/L) of the magnesium chlorate solution, if the density of the solution is 1.39 g mL-1.
Tuesday, February 28, 2012 at 2:41pm by colin

Chemistry
1)The following balanced chemical equation represents the reaction of calcium carbonate CaCO3 (s), with hydrochloric acid : CaCo3(s) + 2HCl (aq) -> CaCl2(aq) + CO2(g) + H2O(l) If 155 g of calcium carbonate reacts with 245 g of hydrochloric acid, what mass of calcium ...
Wednesday, December 19, 2012 at 10:46pm by Nikki

Chemistry
A solution is made by mixing 90.6 g of magnesium sulfate heptahydrate with 2320.0 g of water. 690.00 mL of the solution has a mass of 745.20 g. What is the molarity of the magnesium sulfate solution?
Wednesday, September 11, 2013 at 8:59pm by Jade

Gen Chem
Light of wavelength 272 nm shines on a piece of magnesium metal. What is the speed of the ejected electron? (Light energy greater than that of the work function of magnesium ends up as kinetic energy of the ejected electron. The work function is the minimum energy needed to ...
Monday, January 18, 2010 at 2:08am by Z

college chemistry
If the equilibrium constant (Keq) equals 9.12x1012 for the following reaction between strontium and magnesium: Sr(s) + Mg2+(aq)<==> Sr2+(aq) + Mg(s) Calculate Eo for a strontium=magnesium battery.
Wednesday, April 13, 2011 at 7:47pm by alex

college chemistry
If the equilibrium constant (Keq) equals 9.12x1012 for the following reaction between strontium and magnesium: Sr(s) + Mg2+(aq)<==> Sr2+(aq) + Mg(s) Calculate Eo for a strontium=magnesium battery.
Wednesday, April 13, 2011 at 8:31pm by alex

chemistry
thanks for any help with these translations into scientific notation: 1. magnesium ribbion is dropped into an aqueous solution of hydrochloric acid 2. a solid peice of copper is burned in pure oxygen 3. zinc carbonate is strongly heated in a crucible 4. calcium chloride is ...
Friday, January 19, 2007 at 10:21am by key

chemistry
iron+sulphur together are a mixture of small grains yellow and dark grey.Its chemical symbol is 'Fe + S'.When it reacts with oxygen they create a new chemical substance; Iron Sulphide. What do you put for 'explain the reaction using the Big Idea of Energy? :S HELP xxx
Sunday, April 10, 2011 at 3:20pm by jess

Chemistry (Stoichiometry)
Potassium superoxide (KO2)reacts in the following equation: 4KO2 + 2H2O +4CO2 =4KHCO3 + 3O2 If a person wearing an oxygen mask exhales 0.85 grams of CO2 every minute, how many moles of KO2 are comsumed every 10.0 minutes?
Thursday, February 7, 2013 at 3:45pm by Alexus

ap chemistry
Carbon monoxide reacts with oxygen to form carbon dioxide by the following reaction: 2CO(g) + O2(g) ! 2CO2(g) H for this reaction is −135.28 kcal. If 811.7 kcal is released, how many moles of CO must have reacted?
Wednesday, October 31, 2012 at 5:42pm by cheri

chemistry
Nitric acid reacts with silver metal: 4HNO3 + 3Ag -> NO + 2H2O + 3AgNO3. Calculate the number of grams of NO formed when 10.8 g of Ag reacts with 12.6 g HNO3
Tuesday, October 2, 2012 at 6:25pm by Bob

science
What elements does the compound MgCL2, magnesium chloride, contain? A. Chloride only B. Magnesium only C. M
Wednesday, November 9, 2011 at 8:26pm by stephanie

chem
Calculate the number of grams of magnesium nitride necessary to produce 2.02 L of ammonia gas at STP. I got 4.55g for the upper question which is correct but idk how to do the bottom one: How many moles of magnesium hydroxide can also be formed? Mg3N2(s) + 6 H2O(l)--> 3 Mg(...
Thursday, December 9, 2010 at 6:47pm by rebekah

Chemistry
A mixture of the compounds magnesium oxide and calcium sulfide contains 21.6999 g of magnesium oxide and is 51.3 % by mass magnesium oxide. The compound calcium sulfide is 44.400 % by mass sulfur. Calculate the moles of sulfur in the mixture. I'm not sure what I did wrong. My ...
Wednesday, April 4, 2012 at 12:59am by Lance

Chemistry
Answer the following questions about the characteristics of the elements in Group 2 (the alkaline earths). How do they react with iodine? How do they react with water? How do they react with oxygen? Which reacts the most vigorously? Which element in the group is the most ...
Wednesday, February 5, 2014 at 8:26pm by Stacy

Chemistry
Answer the following questions about the characteristics of the elements in Group 2 (the alkaline earths). How do they react with iodine? How do they react with water? How do they react with oxygen? Which reacts the most vigorously? Which element in the group is the most ...
Wednesday, February 5, 2014 at 8:27pm by Help

science
Could it be oxygen? Fire needs oxygen to keep burning. If you have 2 candles and put a jar over 1. The covered one will burn out while the one with oxygen surrounding it stays lit.
Tuesday, May 13, 2008 at 11:14pm by Cassidy

Chemistry
Oxygen gas and water are produced by the decomposition of hydrogen peroxide. If 10.0 mol of H2O2 decomposes, what volume of oxygen will be produced? Assume the density of oxygen is 1.429g/L. 2H2O2= 2H2O+O2
Tuesday, April 19, 2011 at 10:04pm by YV

chem
Oxygen gas and water are produced by the decomposition of hydrogen peroxide. If 10.0 mol of H2O2 decomposes, what volume of oxygen will be produced? Assume the density of oxygen is 1.429g/L. 2H2O2= 2H2O+O2
Sunday, February 3, 2013 at 5:36pm by oscar

Chemistry
A 19.9mL volume of a hydrochloric acid solution reacts completely with a solid sample of magnesium carbonate, producing 183mL of CO2 that is collected over water at 24.0 degrees C and 738 torr total pressure. The vapor pressure for water at 24.0 degrees C is 22.39 mmHg. What ...
Thursday, April 18, 2013 at 7:18pm by Michelle

Chem
Epsom salts consist of magnesium sulfate heptahydrate. Write its formula. a) How many atoms of oxygen are in 5.15g of Epsom salts? b) How many formula units of the compound are present in 5.15g? c) How many moles of water molecules are in 5.15 g of Epsom salts? Thank you so ...
Friday, October 7, 2011 at 3:05am by Erica

Chemistry
I recently performed an experiment in which magnesium oxide formed. I have to find out the simplest whole number ratio of Mg atoms to O atoms. How do I go about doing this? * Chemistry - DrBob222, Tuesday, October 13, 2009 at 11:19pm Mass MgO - mass Mg initially = mass oxygen ...
Wednesday, October 14, 2009 at 3:31pm by Anonymous

chemistry
Nitric acid reacts with silver metal: 4HNO3+3Ag yields NO+2H2O+3 AgNO3. Calculate the number of grams of NO formed when 10.8 g of Ag reacts with 12.6g of HNO3.
Tuesday, December 3, 2013 at 5:19pm by Anonymous

chemistry
When aqueous solutions of potassium carbonate and magnesium nitrate are combined, solid magnesium carbonate and a solution of potassium nitrate are formed. The net ionic equation for this reaction is:
Monday, March 3, 2014 at 4:27pm by Kay

Chemistry
Identify the following chemical equations by type. 1. If an electric discharge produces 500 cm3 of ozone (O3), how many cm3 of oxygen (O2) are required? 3O2(g) ---> 2O3(g) 2. When 2.75 dm3 of O2 react with an excess of glucose (C6H12O2), according to the reaction below, ...
Thursday, October 24, 2013 at 11:40am by UnName

SMK Duma
how to calculate ? when 21g of magnesium carbonate was heated , magnesium oxide produced . carbon dioxide also released. what is the volume of carbon dioxide released ?
Tuesday, June 5, 2012 at 9:28am by Nurlisa

Chemistry
N2(g) + O2(g) → N2O5(g) What volume of oxygen gas reacts to yield 750.0 cm3 of N2O5? The reaction conditions are 350°C and 2.50 atm pressure. 2N2 + 5 O2 = 2N2O5 I balanced correctly. What is my next step to solve this problem. I am confused and I want to understand the ...
Sunday, February 2, 2014 at 5:06pm by Harry

Chemistry
John forgot to add the few drops of water resulting in the presence of some Mg3N2 in the final solid product. Will her reported magnesium to oxygen mole ratio be reported too high or too low? Explain. Hint: The Mg: N mass ratio is 1:0.38, and the Mg:O mass ratio is 1:0.66.
Sunday, June 13, 2010 at 4:25pm by Alex

Chemistry , please !
when 21g of magnesium carbonate was heated , magnesium oxide produced . carbon dioxide also released. what is the volume of carbon dioxide released ?
Tuesday, June 5, 2012 at 9:50am by Ikram

Chemistry 11
Carbon monoxide gas reacts with oxygen gas to form carbon dioxide gas acooridng to the following equation: 2CO(g)+O2(g)--> 2 CO2(g) IF 1 mole of CO2(g) is produves, how many kilojoules of heat energy are absorbed or released ?
Sunday, September 12, 2010 at 12:55pm by Alz

CHEM Help!
My homework is about translating word equations and I need help in answering this question. Sodium phosphate reacts with calcium nitrate to produce sodium nitrate and calcium phosphate. What would be the answer? I also need help with this other question because it is kind of ...
Tuesday, March 11, 2008 at 4:40pm by Anony

biology
list 2 forms of oxygen found in the atmosphere name the process by which [1]oxygen from the atmosphere is used up [2]oxygen is returned to the atmosphere
Monday, February 27, 2012 at 10:25am by akansha

science
Consider a 1.50-g mixture of magnesium nitrate and magnesium chloride.After dissolving this mixture in water,0.500M silver nitrate is added dropwise until precipitate formation is complete. THe mass of the white precipitate formed is 0.641 g. a)Calculate the mass percent of ...
Wednesday, January 2, 2008 at 3:19pm by Brianna

Chemistry
1) what mass of oxygen will react with 2.64g of magnesium? 2Mg + O2 -> MgO I was going to do 2.64g * (1/2) from the equation but im not sure. Do I have to add a 2 in front of the MgO? 2) How many moles of sodium ions are present in 2.50 L of 0.300 M Na3PO4? I know M=moles/L...
Sunday, December 4, 2011 at 2:57pm by Hannah

Chemistry!!
How do I go about doing this question? How much heat energy is involved when 5.58g of Fe metal reacts with excess oxygen to produce Fe2O3? Do you need the equation, and if so, what would tha be? Fe + O2 > Fe2O3? I don't think that is right though. And also, do you find ...
Saturday, November 22, 2008 at 12:29pm by Lulu

chemistry
A sample of magnesium weighs 10 grams. How many moles of magnesium are there in the sample? 0.4 moles?
Sunday, February 5, 2012 at 1:26pm by kr

chemistry
g oxygen = 115-68.3-13.2-15.9 = ? % oxygen = (?g oxygen/115)*100 = ?
Friday, March 30, 2012 at 8:40am by DrBob222

Chem
IT has to do with solubility of oxygen in the blood: Under pressure, much more oxygen is dissolved in the blood fluid (not attached to hemoglobin). Because there are many more oxygen molecules present in a given volume when under pressure, hyperbaric oxygen dissolves in the ...
Thursday, October 11, 2012 at 4:51pm by bobpursley

chem
Consider the following unbalanced equation: C2H5OH(g) + O2(g) → CO2(g) + H2O(l) 1.55 g of ethanol reacts with 10.0 g of oxygen. What is the total volume of gas present (in L) after the reaction is complete, assuming the reaction takes place at 1.00 atm and 25oC? A) 0.572...
Wednesday, December 15, 2010 at 11:36am by Bogdanam

chemisty
1.5 grams hydrogen 12 oxygen 2gram hydrogen 16 gram oxygen 2.5grams hydrogen 20grams oxygen
Friday, December 14, 2012 at 3:07pm by dionna

chemisty
1.5 grams hydrogen 12 oxygen 2gram hydrogen 16 gram oxygen 2.5grams hydrogen 20grams oxygen
Friday, December 14, 2012 at 3:37pm by dionna

Chemistry
For every liter of sea water that evaporates, 3.70g of magnesium hydroxide are produced. How many liters of sea water must evaporate to produce 5.00 moles of magnesium hydroxide? Please show and explain all steps! Thank you!
Wednesday, September 29, 2010 at 8:35pm by Jack

Chemistry II
17.5 mL of oxygen gas were collected at room temperature (22oC) and 100.2 kPa of atmospheric pressure. a) How many moles of oxygen gas were produced? b) What is the molar volume of the oxygen gas at the conditions in the laboratory?
Monday, September 14, 2009 at 11:38pm by pasely

Chemistry
According to his prelaboratory theoretical yield calculations, a student's experiment should have produced 1.44 g of magnesium oxide. When he weighed his product after reaction, only 1.23 g of magnesium oxide was present. what is the student's percent yield?
Monday, February 16, 2009 at 7:04pm by Sia

Chemistry
HCl Hydrogen, and chlorine: NOT carbon, lithium. Ca(OH)2 one calcium, 2 oxygen, two hydrogen B. 6 sodium 2 Phosphrous, 6 oxygen, 3 calcium, 6 nitrogen, 12 oxygen
Sunday, July 11, 2010 at 8:20pm by bobpursley

Chemistry
You know 1 mol oxygen (32.0 grams) occupies 22.4L at STP. Convert 140 mL to grams, then, %oxygen = (mass oxygen/mass original sample)*100 = ??%
Saturday, April 30, 2011 at 7:03pm by DrBob222

science
not sure about the first one.. the second one is that oxygenated blood obviously carries oxygen with it. Why? It is necessary to have oxygen so that the cells will have oxygen delivered to them. Without oxygen, the cells will not function properly and can start to deteriorate ...
Tuesday, August 28, 2012 at 3:05pm by anonymous

chemistry
Write the balanced equation for ethyne reacting with oxygen; I assume that is the 2:5. Then g oxygen need for the combustion of ethyne x 1/0.2 = ?? OR you need 5 times as much air as oxygen.
Tuesday, February 26, 2008 at 3:51pm by DrBob222

chemistry
A 2.45 gram sample of potassium chlorate is heated an the oxygen gas collected. what is the volume of the oxygen at STP. Is the oxygen gas itself 2.45 grams or do I have to subtract something from that?
Sunday, November 23, 2008 at 5:02pm by Anonymous

physiology
anaerobic respiration is triggered when the ratio of ________falls below a critical level. a.carbon dioxide supply to oxygen need b.oxygen supply to glucose need c.glucose supply to glucose need d.oxygen supply to oxygen need the electron transport chain is responsible for the...
Wednesday, September 17, 2008 at 2:16am by Natash

DrBob222
Im in the 10th grade in Chemistry 1 Honors. Im learning to write a chemical equation. Im confuse on that statement i was given for my homework. The products and reactants are just magnesium Sulfide and magnesium and sulfur? Then why are they talking about yellow crystalline ...
Tuesday, April 29, 2008 at 9:36pm by Christy

Chemistry
Given a 10.0g sample of MgCO3*5H2O, what weight of anhydrous magnesium carbonate can be obtained after driving off the water? The GFM of the sample is 174.3amu. Now.. how do I go about finding the weight of the magnesium carbonate?
Monday, November 9, 2009 at 12:12am by c

chemistry
A ==> C A start is 5.0 g A finish is 3.5 mass oxygen must be 5.0-3.5 = ?? %oxygen = (mass oxygen/mass compound)*100 =??
Thursday, January 20, 2011 at 12:00pm by DrBob222

physics
if 3e charge is at the origin and magnesium nucleus is 3 cm from the origin in the x-direction. what is the magnitude of the net force a boron nucleus would experience half way between magnesium nucleus and 3 e charge
Monday, November 11, 2013 at 2:46am by james

Chemistry
An antacid contains 200mg of aluminum hydroxide and 200mg of magnesium hydroxide per capsule. a. How many moles of Al(OH)3 does each capsule contain? b. What is the mas in milligrams of 0.0457 mole of magnesium hydroxide?
Monday, July 1, 2013 at 11:58am by Glenn

Chemistry
An antacid contains 200mg of aluminum hydroxide and 200mg of magnesium hydroxide per capsule. a. How many moles of Al(OH)3 does each capsule contain? b. What is the mas in milligrams of 0.0457 mole of magnesium hydroxide?
Monday, July 1, 2013 at 12:07pm by Glenn

science
julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.
Wednesday, March 23, 2011 at 1:13pm by chloe

science
julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.
Wednesday, March 23, 2011 at 1:13pm by chloe

science
julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.
Wednesday, March 23, 2011 at 1:13pm by chloe

Chemistry
A sample of magnesium metal reacts with hydrochloric acid solution to produce magnsesium chloride solution and hydrogen gas. a)write a balanced chemical equation for this reaction and include phase designations. The phase designations would be s for solid, aq for aqueous, and ...
Thursday, October 7, 2010 at 6:46pm by Anonymous

Chemistry
A sample of magnesium metal reacts with hydrochloric acid solution to produce magnsesium chloride solution and hydrogen gas. a)write a balanced chemical equation for this reaction and include phase designations. The phase designations would be s for solid, aq for aqueous, and ...
Thursday, October 7, 2010 at 8:07pm by Anonymous

CHEM
hmmm, how is that possible? I calculated it to be 0, 0, 0, 0. Just to make sure, H is singly bonded to oxygen which is singly bonded to fluorine, which is double bonded to oxygen, right? Hmm, can you explain? FC = valence e - lone pair e- 1/2bonded e. FC for hydrogen = 1-0-1...
Monday, November 26, 2007 at 12:19am by Amy

Chemistry
The FORMATION of the white powder is a chemical change or the production of MgO from Mg is a chemical change but white powder sitting in a beaker is not a chemical change. Do you know the definition of a chemical change? A chemical change is one in which the starting materials...
Thursday, January 29, 2009 at 7:06pm by DrBob222

AP Chemistry
Titanium metal can be produced from the reduction of titanium(4) chloride with magnesium metal to form solid titanium and magnesium chloride:write the balance equation for the reaction.
Sunday, October 5, 2008 at 5:13pm by Angel

Chemistry
1.Convert 4.5 mol NO2 to mols oxygen using the coefficients in the balanced equation. Convert mols oxygen to grams oxygen. grams oxygen = mols oxygen x molar mass oxygen. 2. Convert 2.25 mols NH3 to mols H2O using the coefficients of the equation. Convert mols H2O to molecules...
Saturday, November 24, 2007 at 2:53am by DrBob222

chem
A 2.241 g sample of nickel reacts with oxygen to form 2.852 g of the metal oxide. Calculate the empirical formula of the oxide. 1)NiO Give the number of moles of each element to support you answer. moles of Ni 2) 1.339 mol moles of O 3)1.34 mol I know #1 is correct but 2 and 3...
Friday, November 12, 2010 at 5:20pm by hannah

physics
if 3e charge is at the origin and magnesium nucleus is 3cm fom thr origin in the x-axis. what is the magnitude of the net electrostatic force a Boron nucleus would experience at a point half way between magnesium nucleus and 3e.
Sunday, November 10, 2013 at 9:54am by james

chemistry
Convert 2.241 g Ni to mols. Determine mass oxygen fron mass metal oxide - mass metal = mass oxygen. Convert g oxygen to mols oxygen ATOMS. Deterime ratio of atoms. Those will be the subscripts. Post your work if you get stuck.
Monday, March 31, 2008 at 1:39pm by DrBob222

Chem
which of the following occurs when a sample of 0.1M HNO3 is tested? a) phenolphthalein turns pink b) bromthymol blue turns yellow c) Ca9s) reacts and produces CO2 (g) d) Na (s) reacts and rpoduces NO2 (g)
Wednesday, December 15, 2010 at 5:12pm by Liz

Chemistry
When hydrogen selenide gas reacts with oxygen, selenium dioxide and steam are produced. How many liters of selenium dioxide would be produced from 5.50 L of oxygen? Assume 90% yield and that all gases are measured at the same temperature and pressure. Balance the equation: ...
Sunday, October 15, 2006 at 9:08pm by Anonymous

Chemistry
A mole of methane reacts with 64g of oxygen at 1 atm, 425 K. There are two ways in which methane can react with oxygen. It can either form water vapor and carbon dioxide or water vapor and carbon monoxide. After reaction the final gas density is 0.7282 g/L. What is the ...
Thursday, November 18, 2010 at 11:24pm by Natalie

Physics
48.0 g of oxygen (O2 is diatomic) are confined in a rigid 1.00x10^3 L cubical container at temperature 300.0 K. Find the gas pressure and the force exerted by the oxygen gas on any of the six faces of the cube. Mass number of an oxygen atom is 16.0 1.00L=10^-3 m^3
Wednesday, April 24, 2013 at 11:56am by Lashawn

AP Biology
3. the end products are 6 CO2 and 6 H2O, otherwise known as carbon dioxide and water. the carbon dioxide contains the carbon and 2/3 of the oxygen, and the water contains the hydrogen and the 1/3 of the oxygen. don't forget that during aerobic respiration for every glucose ...
Sunday, November 11, 2007 at 4:10pm by Qamar

chemistry
2) Suppose you have 5.00g of powdered magnesium metal, 1.00L of 2.00M potassium nitrate solution, and 1.00L of a 2.00M silver nitrate solution. a. Which one of the solutions will react with the magnesium powder?
Sunday, March 17, 2013 at 1:04pm by Anonymous

physics
the melting temperature of magnesium is 650c what is the melting temperature of magnesium in fahrenheit
Thursday, March 11, 2010 at 9:51am by Anonymous

chemistry
If the.mass of 100 cm of magnesium is 1.02g, what is the mass of the magnesium if its 1.5 cm?????????????? Help!!!!!
Sunday, April 8, 2012 at 5:30pm by jerrica

chem
A 4.91 g sample of aluminum completely reacts with oxygen to form 6.85 g of aluminum oxide. Use this data to calculate the mass percent composition of aluminum in aluminum oxide. i got 61.2% first and it was wrong. then i got 53.0% and it was wrong
Thursday, November 11, 2010 at 5:06pm by hannah

chemistry
Write the balanced chemical reaction for the rusting of iron? the acidic vinegar dissolved a protective coating off the steel wool, allowing the oxidation of the steel to begin. This process is called rusting. In this reaction, iron(III) is combined with oxygen gas to form ...
Monday, April 23, 2007 at 3:03pm by Rox

College Chemistry
Is that 47.0% oxygen or some other number? If 47.0% oxygen, then we have 52.7% Al, 47.0% oxygen, and 0.3% Ti. I set the oxygen up as 0.470 x what number = 0.155 grams number = 0.155/0.470 = yy grams for the gemstone
Monday, March 1, 2010 at 11:04pm by DrBob222

science
how do i balance this equation: sodium hydroxide reacting with sulfurous acid [1 mol sulfurous acid reacts with 2 moles hydroxide ion] my hydrogens aren't balancing right 2 NaOH + H2SO3 -> Na2SO3 + 2 H2O ah thx, i accidently wrote H3O Why are oxygen tanks and spacesuits ...
Thursday, October 19, 2006 at 6:47pm by Dan

Chemistry
8.40 grams of Hydrogen gas reacts with 48.2 grams of Oxygen gas. Give the mass of the water vapor produced and the mass of the excess reactant left over. Can somebody please explain stoichiometry to me? I've failed the test and the retest. I'm usually able to balance the ...
Monday, November 29, 2010 at 7:26pm by Anna

science-biology help
knowing that as the steepness of a concentration graident increases, the rate of diffusion increases, explain how a single celled organisms would respond in an oxygen rich pond compared to an oxygen poor pond. I'm not really sure but in an oxygen poor pond there is a small ...
Saturday, October 17, 2009 at 8:03pm by eleanor

chem101
Hydrogen gas can be produced in the lab by the reaction of magnesium metal and hydrochloric acid. Mg + 2 HC -> MgCl2 + H2 How many grams of hydrogen gas will be produce if 5.00 g of magnesium metal is dissolved in excess acid.
Thursday, March 24, 2011 at 3:47pm by richard

Chemistry
I don't know exactly how to start this question: A sample gas contains 2.95 x 10e24 molecules. The sample is 21.0% oxygen. Calculate volume of oxygen in liters assuming oxygen has a density of 1.308 g/L. Please help me how to do this. I have been stuck and still trying to ...
Friday, October 26, 2012 at 7:55pm by Elizabeth

Chemistry
When 1.5 grams of magnesium burns, how many grams of magnesium oxide will be formed? a) Write a balanced chemical equation for the above reaction. b) Show by unit conversion (show conversion factors, ie. 2 g H20 x 1 mole H2O/18 g H2O x ...... x ...... = answer
Friday, June 15, 2012 at 1:12pm by Ashley

science lab
I got these results from my dissolved oxygen lab: Temperature Dissolved Oxygen in Celcius (mg/L) 17 5.8 21 5.4 23 5.3 27 5.1 I understand that as the temperature increases the dissolved oxygen concentration decreases but i don't understand how to answer this question: does ...
Sunday, September 13, 2009 at 4:43pm by cara

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