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12. How many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7 g Fe?

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chem
Sb2S3(s) + 3 Fe(s) 2 Sb(s) + 3 FeS(s) When 14.7 g Sb2S3 reacts with an excess of Fe, 9.84 g Sb is produced. What is the percent yield of this reaction? %

Chemistry
If 2.44 moles of H2 are reacted with excess Cl2, how many moles of Hcl can be produced? Please explain.

AP chemistry
How many moles of Cu are produced when 0.25 moles of Cu2Se are completely reduced by an excess of hydrogen gas?

chemistry
How many moles of iron are expected from the reaction between 115 moles of H2 with excess Fe3O4?

Chem
Acetic acid (CH3COOH) reacts with isopentyl alcohol (C5H12O) to form isopentyl acetate (C7H14O2), a fragrant substance with the odor of bananas. CH3COOH + C5H12O -> C7H14O2 + H2O If the yield for the reaction is 45%, how many grams of the product are formed when 3.58 g of ...

algebra
Jessica is baking a cake. The recipe says that she has to mix 96 grams of sugar to the flour. Jessica knows that 1 cup of this particular sugar has a mass of 128 grams. She added one over two of a cup of sugar to the flour. Should Jessica add more sugar to make the exact ...

Chemistry
The molar mass of glucose is 180.16g/mol A. How much glucose is needed to make 500 ml of a .44M (.44mol/1L) solution? .44M/L=180.16x.44/100ml=79.27/1000=.07927x500=39.64g/mol/550ml? B What volume of the .44M solution is needed to prepare 1L of a 5% glucose solution? Don't know...

Pre calculus
In other words, if you were going to walk up the hill, you would walk at an angle of 12 degrees. To keep the antenna stable, it must be anchored by 2 cables.The distance from the base of the antenna to the down point DOWN hill is 95 feet. Ignore the amount of cable needed to ...

Chemistry
Hello! I'm doing these questions for my chemistry homework, and I can only figure out the first one, I don't know how to do the rest, I'm completely stuck! Please help!! Thank you! 1.) For the reaction, calculate how many grams of the product form when 18.4g of Ca completely ...

physics repost bobpursley
The energy given off by 300 grams of an alloy as it cools through 50°C raises the temperature of 300 grams of water from 30°C to 40°C. The specific heat of the alloy (in cal/g C ) is: i know Q=CpM(delta T) but what is what? Responses * physics - bobpursley, Monday, June 22...

Math/Chemistry
the atomic mass of an element is the mass, in grams, of one mole (mol), or 6.02 * 10^23. A.) How many atoms are there in 3.5 mol od carbon? B.) If you know that 3.5 mol of carbon weighs 42 grams, what is the atomic mass? C.)Using you answer from (B), find the approximate mass ...

Math
A radioactive material has a half life of 500 years. A) Given 20 grams of this material, how much will remain after 1,000 years? B) Given 100 grams of this material, how much will remain after 750 years? Thank you to whom ever can help me :)

chemistry
A solution contains 10.05 grams of an unknown covalent substance in 50.0 grams of water. The freezing point of this solution is (-) 3.16o C. What is the formula weight of the unknown compound? Below is what I tried, but don't know what to do next. Please explain step-by-step. ...

math
Volume of Aluminum Foil. One cubic centimeter of aluminum weighs 2.7 grams. If a piece of aluminum foil weighs 5.4 grams, find the volume of the aluminum foil.

math
2/5 of a pool was filled with water. after pouring out 5/7 of the amount of water in the pool, 62 liters of water was needed to fill the pool completely. Find the amount of water needed to fill up the empty pool

chemistry
Could someone please tell me if I did this question correctly? An incomplete combustion reaction of 12.125 grams of propane proceeds as follows: 2C3H8 + 11O2 = 3CO2 + 4H2O + 2CO + C(s).How many grams of solid carbon residue are produced as a product? my answer: known: molar ...

Physics
I wondered if someone would check my work concerning an Atwood's Machine. (I am led to believe the answers for these two questions should be the same but I'm not coming out that way.)Thank you! 8.) Caluclate the tension in the Atwood's Machine string for the case when m2 is ...

PHYSICS!!!
To simulate the extreme accelerations during launch, astronauts train in a large centrifuge. If the centrifuge diameter is 13.5m , what should be its rotation period to produce a centripetal acceleration of If the centrifuge diameter is 13.5m , what should be its rotation ...

physics
What is the final equilibrium temperature when 40.0 grams of ice at 0°C is mixed with 5.00 grams of steam at 120°C? The specific heat of ice is 2.10 kJ/kg °C, the heat of fusion for ice at 0°C is 333.7 kJ/kg, the specific heat of water 4.186 kJ/kg °C, the heat of ...

chemistry
Are there formulas to solve the following problem? Complete the following table by replacing question marks with the correct numbers: (Note: Each horizontal row is a separate example, so in row #1, 175.32 grams of NaCl is how many moles of NaCl and how many molecules of NaCl ...

chemistry
if 1.5g of salicylic acid is heated with an excess of acetic anhydride, what is the theoretical yield of acetylsalicylic acid?

AP CHEMISTRY
How many moles of Cu are produced when .25 moles of Cu2Se are completely reduced by an excess of hydrogen gas? Any help is appreciated!

chemistry
How many moles of sodium hydroxide are produced when 0.155 mole of sodium reacts with excess water?

chemistry
In one process of 5.75 kg of CaF2 are treated with an excess of H2SO4 and yield 2.85 kg of Hf calculate the percent yield of hf?

JHU
When excess solid Mg(OH)2 is shaken with 1.00 L of 1.2 M NH4Cl solution, the resulting saturated solution has pH = 9.30. Calculate the Ksp of Mg(OH)2

Chemistry
When excess solid Mg(OH)2 is shaken with 1.00 L of 1.2 M NH4Cl solution, the resulting saturated solution has pH = 9.30. Calculate the Ksp of Mg(OH)2

O.c.h.s
Calculate the mass of ammonia produced when 11.2cm3 of nitrogen gas is reacted with excess hydrogen gas

chemistry
what is the excess reactant of H2SO4+2NaOH->Na2SO4+2H2O H2SO4: NaOH: n=? n=? c=0.025M c=0.030M v=0.4L v=0.4

Chemistry
An excess of Al and 7.9 Mole of Br2 are reacted according to the question 2Al+3 Br2 equals 2AlBr3

CHEMISTRY
HOW MANY MOLES OF SILVER IODIDE COULD BE PRODUCED IF THIS REACTION WAS STARTED WITH 4.3 MOL IODINE AND AN EXCESS OF SILVER?

CHEMISTRY
HOW MANY MOLES OF SILVER IODIDE COULD BE PRODUCED IF THIS REACTION WAS STARTED WITH 4.3 MOL IODINE AND AN EXCESS OF SILVER?

chemistry
If 6.30 moles of C5H12 reacts with excess O2, how many moles of CO2 will be produced in the following combustion reaction?

Chemistry
2 NO + 2 SO2 → 1 N2 + 2 SO3 Determine the mass (in g) of N2 that would be produced when 5.28×10-3 g of SO2 reacts with an excess of NO.

Science
How many litres of water are produced when 3.3 litres of hydrogen is burnt in excess of oxygen at 25degree centigrade?

Chrmistry
What is the percentage recovery if 0.98g of copper is left when reacting 0.5g of copper sulphate with excess zinc?

chemistry
In a mixture of ammonia an chlorine with excess ammonia what is the product

Physics
A metal sphere has a charge of -6 µC. How many excess electrons are there on the sphere?

physics
A metal sphere has a charge of -6 µC. How many excess electrons are there on the sphere?

Physical sciences
An object has an excess of 50 electrons, What is the charge on the object

physics
A metal sphere has a charge of -6 µC. How many excess electrons are there on the sphere?

math
how can i make the content equal the same %? what did i do wrong? Lunch: Ground nut protein Fat content = 3.5 grams 1 gram contains fat of 9 calories 2 grams contain fat of 9 x 3.5 = 31.5 calories Total quantity = 320 calories Fat content = (31.5/320) x 100 = 9.84% Protein ...

Civics
In what way do mixed and market economies support the ideals of democracy? A. Mixed and market economies elect a few farmers and local leaders to choose which goods and services to produce. B. Mixed and market economies do not produce more goods or services than what people ...

chemistry
1. Chlorobenzene, C6H5Cl, is used in the production of chemicals such as aspirin and dyes. One way that chlorobenzene is prepared is by reacting benzene, C6H6, with chlorine gas according to the following BALANCED equation. C6H6 (l) + Cl2 (g) „³ƒnC6H5Cl (s) + HCl (g) a. ...

Stats
A simple random sample will be obtained from a normally distributed population. Find the minimum sample size needed to be 99% confident that the sample standard deviation s is within 5% of the standard deviation. Is such a sample size practical in most cases? The minimum ...

MATH
4. 8 bolts and 6 nuts weigh 138 grams. 3 bolts and 5 nuts weigh 71 grams. Work out the weight of the following:- (a) 4 bolts and 3 nuts (b) 11 bolts and 11 nuts (c) 3 bolts and 3 nuts (d) 1 bolt

Chemistry
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?

chemistry
if you react 37.0ml of .762M sulfuric acid, how many liters of carbon dioxide gas are produced at a pressure of 725mm Hg and a temperature of 21 degrees celsius

Chemistry
Calculate how many moles of products(s) would be produced if 0.500 mole of the first reactant were to react completely. BaCl2 + 2AgNO3 --> 2AgCl +Ba(NO3)2

chemistry
What volume of 0.402MK3PO4 is required to react with 43 mL of 0.507 M MgCl2 according to the equation 2K3PO4 + 3MgCl2 ! Mg3(PO4)2 + 6KCl Answer in units of mL

CHEM! (SCIENCE) NEED HELP
Balance the equation; ___Mg+__HCI->__MgCI2+__H2 How many moles of hydrogen gas are produced when 3.0 molesbof magnesium react?

Chemistry
For the reaction 4FeCl2(aq) + 3O2(g) → 2Fe2O3(s) + 4Cl2(g), what volume of a 0.650 M solution of FeCl2 is required to react completely with 8.58 × 1021 molecules of O2?

math
how can i make the content equal the same %? what did i do wrong? Dinner: Chicken role protein Fat content = 2.5 grams 1 gram contains fat of 9 calories 2 grams contain fat of 9 x 2.5 = 22.5 calories Total quantity = 400 calories Fat content = (22.5/400) x 100 = 5.625% Protein...

Chemistry II
Hydrochloric acid (77.0 mL of .267 M) is added to 236.0 mL of .0730 M Ba(OH)2 solution. What is the concentration of the excess H+ or OH- ions left in the solution? Done two of these. They are all alike. Use the template from the previous problem. Post your work if you get ...

ACC291
The following stockholders' equity accounts arranged alphabetically are in the ledger of McGrath Corporation at December 31, 2011. Common Stock ($10 stated value) $1,500,000 Paid-in Capital from Treasury Stock 6,000 Paid-in Capital in Excess of Stated Value-Common Stock 690,...

physics
At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially has...

Chem
The heat of vaporization of ammonia is 23.4 kj/moles. How much heat is required to vaporize 1.00kg of ammonia? How many grams of water at 0 degree celcius could be frozen to ice at 0 degree celcius by evaporation of this Amount of ammonia? I got the kj by doing the layout 1,...

Algebra
One alloy of brass is 70% copper and 30% zinc. Another alloy of brass is 40% copper and 60% zinc. How many grams of each of these alloys need to be melted and combined to obtain 300 grams of a brass alloy that is 60% copper and 40% zinc

Physics Classical Mechanics
A uniform stick of mass m and length l is suspended horizontally with end B at the edge of a table as shown in the diagram, and the other end A is originally held by hand. The hand at A is suddenly released. At the instant immediately after the release: (a) What is the ...

chemistry
An aqueous solution containing bromothymol blue is used to identify the chemical properties of thionyl chloride gas. When the gas is bubbled through the bromothymol blue solution color changes from blue to yellow we could say that the gas ____________________. Question 4 ...

PHYSICS(HELP)
A uniform stick of mass m and length l is suspended horizontally with end B at the edge of a table as shown in the diagram, and the other end A is originally held by hand. The hand at A is suddenly released. At the instant immediately after the release: (a) What is the ...

Chem hwk
How many grams of solute are required to make a 504 mL solution of copper (I) nitrate with a concentration of 1.3317 M? I go 238.6 g but my friend said I'm way off When 84.2730 grams of solute are used to make a 504 mL solution of copper (I) nitrate, what is the concentration ...

4th grade math
thirty six buses would be needed to carry the passengers and crew off three 747 jumbo gets. heres the question: how many buses fo one jet two jets. and how many jets for 180 buses and 252 buses and how many jets would be needed to carry the passengers on 264 buses

College Physics
In ordinary laboratory circuits, charges uC (microcoulomb) and nC (nanocoulomb) range are common. How many excess electrons must you add to an object to give it a charge of (a) -2.50 uC (b) -2.50 nC.

chemistry
Calcium oxalate dihydrate is CaC2O4 2H20. Write the equation for the reaction which will occur when this hydrate is heated to a temperature slightly in excess of 100 degrees C.

science
The combustion of acetylene in the presence of excess oxygen yields carbon dioxide and water: 2C2H2 (g) + 5O2 (g) ¨ 4CO2 (g) + 2H2O (l) The value of ƒ¢So for this reaction is __________ J/K.

Physic II
Why would you expect a plate to hold more excess charge on each of its conducting surfaces when the voltage difference between the two pieces of conductor increases?

Physic II
Why would you expect a plate to hold more excess charge on each of its conducting surfaces when the voltage difference between the two pieces of conductor increases?

chemistry
Calculate the theoretical volume of gas you would expect to be evolved from your experiment if X moles of magnesium were reacted with an excess of HCl at standard conditions (STP).

Chem
An excess of Al and 7.9 mole of Br2 are reacted according to the equation 2Al+ 3Br2 equals 2AlBr3. How many moles of AlBr3 will be formed assuming 100% is yield?

chemistry
How much work is done when 2.0 liters of CH4(g) undergoes combustion in excess oxygen at 0 degrees Celsius and 1.00 bar (assuming the volume of water formed is negligible)?

Chemistry
Calculate the mass of water formed by the complete reaction of 572 g of propane (C3H8) with excess oxygen. (Write a balanced equation.) Answer in units of g.

Chemistry
When determining the pH of a solution, will the indicator react with and change the properties of the solution. No, not significantly.

Chemistry-please help
Can calcium react with chlorine gas to give calcium chloride?

chemistry
how many moles of chlorine gas react with 0.100 moles of Fe (metallic iron)?

chem
what is the reaction when ethanol and ethanoic acid react in the presence of an acid catalyst.

science
what is the reaction when ethanol and ethanoic acid react in the presence of an acid catalyst

chemistry
how many moles of oxygen gas are required to react with 4.0 moles of Mg? 2 Mg (s) + O2(g) → 2 MgO (s)

s
he a 1.00 m sol'n of nitric acid. how many ml of this sol'n will he need to add to the soil to completely react with 56.8 g of al(oh)3

chemistry
Calculate the number of grams of reactant left over when 28.35 grams of silver reacts with 50.0 liters of air at STP which is 20.9476 % oxygen by volume. The density of air at STP is 1.292 g/L. attemt at a solution: m = dv = 64.6 g of air moles silver =28.35/108=0.26 moles of ...

chemistry
Why does it take longer for strong acids to react than weak acids?

chemistry
How many moles of TiCl4 can be produced when 9.00 mol Ti react with 4.00 mol Cl2?

chemistry
How many moles of TiCl4 can be produced when 9.00 mol Ti react with 4.00 mol Cl2?

Chemistry
How many moles of H2SO4 are required to react with 50 mL of NaOH solution? NaOH is 1M.

chemistry
how many moles of no2 remain when 2.5 moles of n205 completely react

chemistry
how many moles of co2 produced when 3 moles of hcl react with caco3

chemistry
Nitrogen gas can be prepared by passing gaseous ammonia over solid copper (II) oxide at high temperature. The other products of the reaction are solid copper and water vapor. If a sample containing 20.3 g of NH3 is reacted with 95.8 g of copper oxide 1. Which is the liming ...

Chemistry
You have 100 mL of a 0.450 M sulfuric acid solution, but you now need to add NaOH to make the solution basic. How much NaOH ( in grams) will you need to add to make the solution have a pH of 13.0? The units are grams of NaOH.

Chem II
What mass of PbI2 can be formed from 75.0 mL of 0.65 M NaI by adding excess Pb(NO3)2? Pb(NO3)2 + 2NaI ---> PbI + 2NaNO3

Chemistry, Urgent!
How is this question solved?! When 21.6g of a metal X are burned in excess oxygen, 40.8g of X2O3 are formed. From this data, what is the metal X?

Chemistry
If 15.0 kJ are released when 1.40 g of F2 reacts with an excess of SiH4, complete the thermochemical equation below. SiH4(g) + 2 F2(g) SiF4(g) + 4 HF(g) ÄHrxn=?kJ

Chemistry
If 15.0 kJ are released when 1.40 g of F2 reacts with an excess of SiH4, complete the thermochemical equation below. SiH4(g) + 2 F2(g) SiF4(g) + 4 HF(g) ÄHrxn = ?kJ

grade 12 chemistry
what amount of magnesium chloride will be produced when 250 ml of 8.0 mol/Hcl reacts with excess magnesium

chemistry
How many g NO gas can be produced from 120 mL of 2.80 M HNO3 and excess Cu? 3Cu(s) + 8HNO3(aq) ---> 3Cu (NO3)2(aq) + 4H2O(l) + 2NO(g)

chemistry
Hydrochloric acid (68.0 mL of 0.037 M) is added to 249.0 mL of 0.062 M Ba(OH)2 solution. What excess ions are left in the solution?

cemistry
when 2.13 moles of C3H8 burn in excess oxygen, how many moles of CO2 will be formed? Assume this is a complete combustion

CHEMISRTY
How many liters of H2O will form when excess O2 reacts with 100 liters of H2 according to the gas phase reaction:

Chemistry
the reaction of 6.62g of carbon with excess oxygen yields 13.40g of CO2. what is the percent yield of this reaction

Chemisty
An excess of aqueous AgNO3 reacts with 43 mL of 5 M K2CrO4(aq)to form a precipitate. what is it? What mass of precipitate is formed? answer in g

chemistry
calculate the mass of sodium chloride produced when 5.50 moles of sodium reacts in excess chlorine gas.

chemistry
find mass of calcium carbonate obtaqined in reaction of 10.0g of calcium oxide with an excess of carbon dioxide

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