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August 29, 2014

Search: How much fluorine (in grams) did the second sample produce?

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chemistry
Upon decomposition, one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produce 1.38kg of magnesium. How much fluorine (in grams) did the second sample produce?
September 3, 2013 by tatianna

College Chemistry
Upon decomposition, one sample of magnesium fluoride produced 1.66kg of magnesium and 2.56kg of fluorine. A second sample produced 1.25kg of magnesium.How much fluorine (in grams) did the second sample produce?
January 28, 2013 by Kaycie

Chemistry
Upon decomposition, one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produced 1.38kg of magnesium. How much fluorine (in grams) did the second sample produce?
September 7, 2013 by Anonymous

Chemistry
Upon decomposition, one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produced 1.38kg of magnesium. How much fluorine (in grams) did the second sample produce?
September 7, 2013 by Anonymous

Chemistry
Upon decomposition, one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produced 1.50 kg of magnesium. How much fluorine (in grams) did the second sample produce?
October 9, 2012 by Eliza

Chemistry
one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produced 1.31kg of magnesium. How much fluorine (in grams) did the second sample produce?
September 26, 2013 by Jay

Chemistry
Upon decomposition, one sample of magnesium fluoride produced 1.64 kg of magnesium and 2.57 kg of fluorine. A second sample produced 1.38 kg of magnesium. How much fluorine (in grams) did the second sample produce?
July 7, 2010 by Tiffany

Chem
Upon decomposition, one sample of magnesium fluoride produced 1.65 of magnesium and 2.57 of fluorine. A second sample produced 1.38 of magnesium. How much fluorine (in grams) did the second sample produce?
February 17, 2011 by KNH

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?
March 27, 2014 by skittles

Chemistry
10.0 grams of magnesium reacted with fluorine to produce MgF2 Find balance equation: 2MgF2=2MgF 1)can someone explain to me how many grams of fluorine reacted with magnesium. 2)How many grams of MgF2 were formed in the reaction?
December 2, 2012 by malina

chemistry
a 3.00mole sample of fluorine reacts with sodium bromide to produce how many grams of sodium fluoride?
March 4, 2011 by sharday

Chem
1) Mg + F2 = MgF2 10.00 grams of magnesium reacted with fluorine to produce MgF2 Find : a) Balance the reaction b) How many grams of fluorine reacted with magnesium. Answer:____________ c) How many grams of MgF2 were formed in the reaction. Answer:____________
December 2, 2012 by Malina

Chemistry
A sample of 0.30 moles of a metal M reacts completely with excess fluorine to form 18.69 grams of MF2. How many moles of F are in the sample of MF2 that forms? M + F2 ---> MF2 How many grams of M are in this sample of MF2 ?
July 29, 2011 by Brooke

Chemistry H.
Assume that the nucleus of the fluorine atom is a sphere with a radius of 5 x 10 ^ -13 cm. Calculate the density of matter in the fluorine nucleus in grams/cm^3. Now convert your answer to tons per cubic centimeter, knowing that there are 454 grams in one pound.
September 23, 2012 by Jennifer

chemistry
The reaction of fluorine with ammonia produces dinitrogen tetra fluoride and hydrogen fluorida. 5F2(g)+2NH(g)---> N2F4(g)+6HF(g) A. If you have 66.6gNH3, how many grams of F2 are required for a complete reaction? B. how many grams of NH3 are required to produce 4.65g HFCS? ...
February 20, 2014 by Lexa

Chemistry - Stoichiometry
16.2g of magnesium reacts exactly with 25.3g of fluorine to produce magnesium fluoride, the only product. How many grams of magnesium fluoride could be produced from the reaction of 10.5g of magnesium with excess fluorine. This is simple if you use ratios... You know that 16.2...
August 25, 2005 by Kevin

Chemistry
The reaction of fluorine with ammonia produces dinitrogen tetrafluoride and hydrogen fluoride. 5 F2(g) + 2 NH3(g) N2F4(g) + 6 HF(g) (a) If you have 73.7 g NH3, how many grams of F2 are required for complete reaction? b) How many grams of NH3, are required to produce 5.25 g HF...
January 27, 2011 by Kelsey

CHEMISTRY
HOW MANY GRAMS OF LITHIUM DO YOU NEED TO REACT WITH 2.5 X 10^24 FLUORINE MOLECULES TO PRODUCE LITHIUM FLUORIDE?
May 30, 2012 by LYNSEY

AP Chem
A sample of 0.71 moles of a metal M reacts completely with excess fluorine to form 44.24 grams of MF2. How many moles of F are in the sample of MF2 that forms?
June 18, 2012 by Nihar

Chemistry
How many grams of fluorine are needed to produce 120. g of phosphorus trifluoride if the reaction has a 78.1% yield from the following reaction: P4+6F2 -> 4PF3
January 10, 2012 by Anonymous

Chemistry
Fluorine-18, which has 1/2 life of 110 minutes, is used in PET scans. If 100 mg of fluorine-18 is shipped @8AM, how many milligrams of the radioisotope are still active if the sample arrives at the lab at 1:30 pm?
January 19, 2011 by Bebe

Chemistry
Ethane (C2H6) burns with oxygen to produce carbon dioxide and water. A sample of ethane was burned completely and the water that formed had a mass of 1.61g. How much ethane, in moles and in grams, was in the sample?
November 10, 2010 by Shabear

Chemistry
Ethane (C2H6) burns with oxygen to produce carbon dioxide and water. A sample of ethane was burned completely and the water that formed had a mass of 1.61g. How much ethane, in moles and in grams, was in the sample?
November 10, 2010 by Shabear

Chemistry
Please help me out... The pressure of a container of fluorine gas with a volume of 1.5L is 678mmHg at 55.0*C. a. If the volume of the fluorine gas increases to 5.0L, what would be the pressure of the gas in atm? The amount and tempature of gas are consistant. b.How many grams ...
November 19, 2011 by Victor

Chemistry
Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride: S (s) + 3F2 (g) SF6 (g) What is the minimun number of moles of fluorine gas needed to completely react with 16 g sulfur? a. 1 b. 1.5 c. 2 d. 3 e. 6
November 1, 2009 by Courtne

chem
An automobile burns 65 grams of gasoline over 20 minutes. The gasoline combines with 100 grams of oxygen in this reaction, to form carbon dioxide and 47 grams of water. How much carbon dioxide is formed? do I use the heat capacity equation? How much oxyen is used to produce 47...
February 14, 2007 by tina

chemistry
Upon decomposition, one sample of magnesium fluoride produced 1.95 kg of magnesium and 3.05 kg of fluorine. A second sample produced 1.10 kg of magnesium.
March 16, 2014 by elijah mann

statistics ***pls help!
for each of the following, assume the 2 samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the 2 sample means. a)each sample has n = 5 scores with s^2 = 38 for the first sample, and s^2 =42 for the ...
April 14, 2011 by jerr ******

stat
1. The amount of pyridoxine (in grams) per multiple vitamin is normally distributed with = 110 grams and = 25 grams. A sample of 25 vitamins is to be selected. So, 95% of all sample means will be greater than how many grams?
December 1, 2010 by Anonymous

chemistry
Please help me through this problem... A 0.5117 gram fertilizer containing phsphorus was oven dried. The weight of the dried sample is 0.4998 grams. However, 10% moisture is still retained in the sample. Calculate the moisture content in the sample in as received and dry basis...
August 31, 2007 by smiley

chemistry
There are 50.0 grams of NH3 + Na which produce NaNH2 + H2 (unbalanced) How much grams is produced with the excess of the reactant?
March 11, 2010 by Jakov

Chemistry
Using John Dalton's law of multiple proportions. There are two different compounds of sulfur and fluorine. In SF6, the mass of fluorine per gram of sulfur is 3.55 gF/gS. IN the compound, SFx, the mass of fluorine per gram of sulfur is 1.18 g F/g S. What is the value of X for ...
August 28, 2011 by Preston

Physical Science
1. Which equation correctly shows beta decay? (A) 210/82 Pb -> 209/81 Tl + 0/-1 e + y (B) 210/82 Pb -> 209/83 Bi + 0/-1 e + y (C) 210/82 Pb -> 210/83 Tl + 0/-1 e + y (D) 210/82 Pb -> 210/83 Bi + y (E) 210/82 Pb -> 210/83 Bi + 0/-1 e + y 2. The half-life if radon...
November 18, 2013 by CJ

Chemistry
1. The reaction of fluorine with ammonia produces dinitrogen tetrafluoride and hydrofluoric acid. F2(g) + NH3(g) N2F4(g) + HF(g) a. If you have 66.5g NH3, how many grams of F2 are required for complete reaction? b. How many grams of NH3 are required to produce 4.65g HF? c. ...
March 26, 2011 by Sulon

College Chemistry
Plaster of Paris is the compound calcium sulfate hemihydrate, CaSO4*1/2H2O What mass of water is liberated when a 2.763 gram sample is heated to constant mass? The sample is 2.763 grams How much of the 2.763 gram sample is water? I need an amount in grams. Amount of anhyrdate...
October 8, 2011 by Roy

Physics
The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second. WHat is the mass of the sample? m= in grams PLease help me out...Thank you! :)
May 7, 2013 by Leila

Physics!
The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second. WHat is the mass of the sample? m= in grams PLease help me out...Thank you! :)
May 8, 2013 by Leila

chemistry
The mass ratio of Kr to F in a particular compound is 2.206:1. How many grams of fluorine are present if the compound contains 713.3 grams of Kr?
October 1, 2010 by Elizabeth

chemistry
The mass ratio of Kr to F in a particular compound is 2.206:1. How many grams of fluorine are present if the compound contains 713.3 grams of Kr?
October 1, 2010 by Elizabeth

ap
The reaction of 5.3 grams of fluorine with excess chlorine produced 4.6 grams of ClF3. What percent yield of ClF3 was obtained? Answer in units of %
August 30, 2013 by Gabriella

ap chemistry
The reaction of 9.5 grams of fluorine with excess chlorine produced 5.9 grams of ClF3. What percent yield of ClF3 was obtained? Answer in units of %
September 11, 2012 by cheri

Physics Plz help me
The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second. WHat is the mass of the sample? m= in grams PLease help me out...Thank you! :)
May 6, 2013 by Leila

Physics Plz help me
The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second. WHat is the mass of the sample? m= in grams PLease help me out...Thank you! :)
May 6, 2013 by Leila

Chemistry. Please :(
1. If 23.00 grams of carbon dioxide and 18.75 grams of water are formed from the combustion reaction. What is the percent yield for CO2 and H20. How much in grams of the excess reactant remains? 2. Balance the equation and determine the mass in grams of hydrogen gas produced ...
April 25, 2014 by Cassy

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

Chemistry (Regents level)
1- In the reaction Fe2O3 + 3 CO = 2 Fe + 3 CO2, what is the total number of moles of CO used to produce 112 grams of iron? a) 1.0 b)2.0 c)3.0 d)4.0 2- Given the reaction: 4Al + 3O2 = 2Al2O3 How many moles of Al2O3 will be formed when 27 grams of Al reacts completely with O2? a...
February 23, 2008 by Jessica

chemistry
1.How many atoms are in a sample of copper with a mass of 18.46 grams? 2.How many formula units are in a sample of salt with a mass of 67.69 grams? 3.How many molecules are in a sample of water with a mass of 44.99 grams? 4.What is the mass in grams of 0.250 moles Mg? 5.How ...
February 6, 2011 by grace

chemistry
1.How many atoms are in a sample of copper with a mass of 18.46 grams? 2.How many formula units are in a sample of salt with a mass of 67.69 grams? 3.How many molecules are in a sample of water with a mass of 44.99 grams? 4.What is the mass in grams of 0.250 moles Mg? 5.How ...
February 6, 2011 by grace

Chemistry
Water is added to 4.267 grams of UF6. The only products are 3.730 grams of a solid containing only uranium, oxygen and fluorine and 0.970 gram of gas. The gas is 95.0% flourine, and the remainder is hydrogen. From data determine the empirical formula of the gas. What fraction ...
January 9, 2011 by deanna

chemistry
Water is added to 4.267 grams of UF6. The only products are 3.730 grams of a solid containing only uranium, oxygen and fluorine and 0.970 gram of gas. The gas is 95.0% flourine, and the remainder is hydrogen. From data determine the empirical formula of the gas. What fraction...
January 9, 2011 by Deanne

College Algebra - Chemistry
A goldsmith has two gold alloys. The first alloy is 25% gold and the second is 55% gold. How many grams of each should be mixed to produce 40 grams of an alloy that is 43%?
December 11, 2010 by Lyanne

Chemisty
Fluorine gas can react with ammonia gas to produce dinitrogen tetrafluoride gas and hydrogen fluoride gas. This reaction is described by the following balanced equation: 5 F2 (g) + 2 NH3 (g) N2F4 (g) + 6 HF (g) What mass of hydrogen fluoride gas is produced from 135 g of ...
March 8, 2013 by Anna

Honors Chemistry
Can someone check my first answer and help me with the second question? Thanks so much!! :D 1. N2 + 3H2 ==> 2NH3 : How many grams of NH3 can be produced from the reaction of 28 g of N2 and 25 g of H2? ==> I got 37.5 grams. 2. How much of the excess reagent in Problem 1 ...
November 5, 2009 by Emily

statistic
. For each of the following, assume that the two samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the two sample means. a. Each sample has n _ 5 scores with s2 _ 38 for the first sample and s2 _ 42...
November 11, 2012 by Sharon

Chemistry
I would be grateful if someone could please review these and tell me if I am correct. Thanks! 1.What is the empirical formula for a compound whose molecular formula is C2Cl6? a. CCl3 b. CCl4 c. C2Cl6 d. CCl e. need more information I think the answer is E more information is ...
October 25, 2009 by Mattt K

phoenix
Each sample has n= 5 scores with s2 =38 for the first sample and s2 = 42 for the second. (Note: Because the two samples are the same size, the pooled variance is equal to the average of the two sample variances.)calculate how much difference should be expected, on average, ...
May 12, 2013 by diana

Science
How many grams of water must decompose to produce 2 grams of hydrogen and 16 grams of oxygen?
January 23, 2013 by Anonymous

chemistry
How much of the water (in grams or mL) is consumed to produce 15 mL of the H2 gas
November 22, 2011 by Ashley

chemistry
How much of the water (in grams or mL) is consumed to produce 15 mL of the H2 gas?
November 23, 2011 by Shika

Physics
If a sample of a radioactive isotope has a half-life of 5 year(s), how much of the original sample will be left at the end of the second year? How much will be left at the end of the third year of thr original sample? How much will be left at the end of the fourth year of the ...
November 23, 2009 by TITA

Science
Chemistry! So a metal is found to absorb 1000 calories as it is heated from 40.0C to 60.0C. How much heat would the same sample absorb if it were heated from 60.0C to 80.0C? I know I'm supposed to use the equation Q=s x m x delta t (or soemthing) Q= energy absorbed s= specific...
January 14, 2013 by Ari

chemistry
What is the total sample size (in grams)for a sample of ethanol (CH3CH2OH) which contains 3.39 grams of oxygen?
September 22, 2010 by Grace

Chemistry
Hi, i am stuck on this question, how do I go about answering it? why are fluorine atoms normally found as part of fluorine molecules?
November 20, 2012 by Ruth

chemistry
when 2.31 moles of sulfur hexafluoride are synthesized from te elements, how many grams of fluorine were used
February 4, 2013 by Anonymous

chemistry
Potassium cyanide (KCN) reacts with acids to produce the poisonous hydrogen cyanide gas, HCN, according to the reaction below: KCN(aq) + HCl(aq) = HCN(g) + KCl(aq) If a sample of 0.653 g of KCN is placed in an excess of HCl, how much HCN, in grams, is produced?
October 3, 2011 by Kara

chemistry
A sample of one liquid has a mass of 60 grams and a volume of 50 centimeters cubed; a sample of a second liquid has a mass of 30 grams and a volume of 40 centimeters cubed. They are put in a container and mixed. Can you determine what the mass and the volume of the mixture is?
October 12, 2012 by Ann

chem
Use this percentage to calculate the mass of fluorine in grams contained in 29.0 g of copper (II) fluoride
April 25, 2010 by melissa

Chemistry
How much hydrogen and oxygen must react to produce 65.00 grams of water? 2H + O2 -> 2H2O
October 13, 2010 by Brooke

Thermochemistry
A 1.00-g sample of solid calcium was burned in fluorine to give a 1.95 g sample of pure CaF2. The energy given off in this reaction was 30.3 kJ. Given this information, we can say that the heat of formation of 1 mol of CaF2 is
June 19, 2010 by joan

Chemistry
What pressure will be exerted by 109 grams of fluorine gas in a 3,4000mL cylinder at 20degree celcius?
April 2, 2009 by Ivana

chemistry
How many liters of fluorine gas, at standard temperature and pressure, will react with 23.5 grams of potassium metal?
October 31, 2010 by smith

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 ...
March 5, 2014 by steven

Chemistry
When elemental sulfur,S8,is heated with AgF,a gas forms that contains only sulfur and fluorine. The following tests were done to characterize this gaseous product. *The density of the gas was found to be 0.807g/L at 152mmHg and 35 degrees celsius. *When the gas reacts with ...
November 10, 2009 by rasuka_geo

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 ...
March 5, 2014 by steven

Chemistry
Question: What mass of water, in grams, would have to be decomposed to produce 17.6 L of molecular oxygen at STP? Work: n=PV/RT x=(1 atm)(17.6 L)/(0.0821)(273 k) x = 1.27348295454546 1.27348295454546 x 2 = 2.54696590909092 Grams= Moles x 18.0 Grams = 2.54696590909092 x 18.0 ...
July 13, 2011 by Bradley

chemistry
in a compound of nitrogen and oxygen, 14.0 grams of nitrogen combines with 32.0 grams of oxygen. How much oxygen is required to combine with a sample of 10.5 grams of nitrogen in producing same compound? How do you do the math?
June 6, 2011 by Don

Chem
when 2.31 moles of sulfur hexafluoride are synthesized from te elements, how many grams of fluorine were used PLEASEEEEE HELPPPP MEEE!
February 4, 2013 by Em

Science
When elemental sulfur,S8,is heated with AgF,a gas forms that contains only sulfur and fluorine. The following tests were done to characterize this gaseous product. *The density of the gas was found to be 0.807g/L at 152mmHg and 35 degrees celsius. *When the gas reacts with ...
November 10, 2009 by anonymous

college
In the reaction Fe2O3 + 3CO 2Fe + 3CO2 How much CO is used to produce 112 grams of iron?
July 12, 2010 by Dillon

chemistry
In the reaction Fe2O3 + 3CO 2Fe + 3CO2 How much CO is used to produce 112 grams of iron?
July 13, 2010 by Dillon

chemistry
How much of the water (in grams or mL) is consumed to produce 15 mL of the H2 gas? Use PV = nRT ; assume T = 298K, P = 1 atm
December 1, 2011 by mook

Chemistry
A sample of InCl3, is known to be contaminated with NaCl. The contaminated sample weighs 2.84g. When the contamintaed sample is treated with excess AgNO3(aq). 574 grams of AgCl(s) are obtained. What is the percentage by mass of InCl3 in the sample? (All I really need to know ...
January 21, 2007 by Carlos

chemistry
A sample of H2 with a volume of 35.0 L at STP is reacted with excess O2 to produce H2O. How many grams of H2O are produced? 2 H2 (g) + O2 (g) --> 2 H2O (g)
November 14, 2011 by Anonymous

algebra
Suppose a sample of Cesium-137 with initial mass of 200 grams decays to a mass of 160 grams voer the course of 10 years. Find the half-life of Cesium-137 (Round to the nearest year) How much Cesium-137 is left in the sample after 60 years? Round to the nearest tenth of a gram.
July 30, 2011 by Melanie

Chemistry
a sample of an unknow metal exists as a perfect cube that meausres 0/78 in on a side and weighs 61.4 grams. what would be the mass, in grams, of a diff sample of this metal that has a volume of 25.0 cm^3
September 18, 2012 by Helen

chemistry
an original sample of K-40 has a mass of 25.00 grams. After 3.9x 10 to the ninth years, 3.125 grams of the original sample remains unchanged. What is the half-life ok K-40 in minutes? Is it 6.8328 x 10 to the 14th
January 16, 2012 by micky

Chemistry
Given the following equation: Na2O + H2O ---> 2 NaOH. How many grams of NaOH is produced from 1.20 x 10^2 grams of Na2O? How many grams of NaO2 are required to produce 1.60 x 10^2 grams of NaOH?
March 21, 2012 by Carl

chemistry
If you mix 150.0 of sodium with the necessary amount of chlorine, how much salt should you produce(measured in grams)?
March 2, 2011 by Kaylee p

physics
At the grocery store, you place some produce onto a scale that has a vertically hung spring supporting the produce. The spring has a spring constant of 16 N/m. Your produce bobs up and down with an amplitude of 20 cm, and the maximum speed it reaches is 0.4 m/s. How much does ...
July 18, 2012 by shawn

Chemistry
Given 80g of Calcium reacts with Fluorine at STP, how many atoms of Fluorine are consumed? Heres the formula: Ca (s) + F(subscript 2) --> CaF(subscript 2) How do i do this? Thanks! Jackie
January 16, 2012 by Jackie

chemistry
You are a chemist requested to review and analyse certain debris found on thebottom of aboot found in a crime scene. The debris contains metal fragments. If you identify the metal fragments---it will help the detctive identify the locations traveled by the person who did the ...
February 26, 2012 by Jimmy

Algebra
A goldsmith has two gold alloys. The first alloy is 20% gold; the second alloy is 60% gold. How many grams of each should be mixed to produce 40 grams of an alloy that is 30% gold? amount of 20% gold_____g Amount of 60% gold_____g
June 1, 2013 by Rick

chemistry - Bonding
#1) Draw the following ions using a Bohr diagram: b)oxygen: i got [oxygen:2)8)]-2 (the -2 is an exponent) but the answer said [oxygen: 2)8)8)]-2...is this right? d)fluorine: i got [fluorine:2)8)]-1 and the book says [fluorine: 2)8)8)]-1..again, is the book making a mistake? #8...
May 10, 2008 by Sarah

Chemistry
how many grams of phosphorus pentachloride are needed to produce 49 grams of phosphoric acid.
May 12, 2013 by Anonymous

Chemistry
4HN3 + 5 O2 = 4NO + 6 H20. How many grams of O2 are required to produce 90 grams of NO?
July 23, 2008 by Persia

Chemistry
How many grams of sodium azide are required to produce 31 grams of nitrogen
May 3, 2011 by Nikki

chemistry
how many grams of HCL is needed to produce 200 grams of hydrogen?
April 26, 2014 by Anonymous

Chemistry
A sample of the compound prepared in this experiment, weighing .1021g, is dissolved in HNO3 and diluted to a volume of 100mL. A 10mL aliquot of that solution is mixed with 10mL 6 M NH3. The [Cu(NH3)4 2+] in the resulting solution is 5.16x10^-3 M. How many moles of Cu were in ...
October 23, 2012 by annie

Stats
A company with two plants producing the same product, but with two slightly different manufacturing processes, conducted a sample study at each of the two plants with the following results: The sample statistics from the first group are: n = 40, x-bar = 18, s = 4.2. The sample...
November 13, 2013 by Cam

chemestry
How many grams of O2 are needed to produce 45.8 grams of Fe2O3 in the following reaction? 4Fe(s)+3O2(g) - 2Fe2O3(s)
February 27, 2013 by richard

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