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August 31, 2016

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

chemistry
The temperature at which crystal will first appear when a solution is cooled from 60°c to 20°c?
Saturday, September 26, 2015 by Anonymous

Chemistry
I was doing a lab experiment on the reaction of copper(II) sulphate and aluminum: 1) I measured 2.02g of copper(II) sulphate pentahydrate 2) I dissolved the copper(II) sulphate pentahydrate in 10mL of distilled water 3) I added 2.0mL of concentrated HCl to the solution and ...
Saturday, September 26, 2015 by Patrick

Organic Chemistry
During the synthesis of a Grignard reagent in diethyl ether solvent, what is the identity of the bubbles that show up on the surface of the magnesium? -Gaseous magnesium byproducts -Gaseous O2 -Gaseous H2 -Gaseous diethyl ether
Saturday, September 26, 2015 by Ash

Chemistry
I was doing a lab experiment: 1) I measured 2.02g of copper(II) sulphate pentahydrate 2) I dissolved the copper(II) sulphate pentahydrate in 10mL of distilled water 3) I added 2.0mL of concentrated HCl to the solution and mixed well 4) I added 0.25g on Aluminun foil to the ...
Saturday, September 26, 2015 by Patrick

chemistry uncertainty rule
if I want to find the uncertainty for a certain molar mass containing 4 atoms of Oxygen, do I multiply the error and the MM by 4: like this 4(15.9994 plus of minus .0003) = 63.9976 plus or minus .0012 (distribute the 4?) or follow the rules for mult. of uncertainty which would...
Friday, September 25, 2015 by paul

Chemistry
Calculate the moles of aqueous calcium carbonate present in a 50.00mL sample of a calcium carbonate standard solution, assuming the standard is known to have a hardness of 125 ppm (hardness due to CaCO3). You can assume that the density of the sample is 1.000 g/mL and the ...
Friday, September 25, 2015 by Brittany

Chemistry
How many grams silver is added to 13 grams gold to produce 85% gold alloy?
Friday, September 25, 2015 by Brenna

Chemistry 120
Write the formulas of the compounds formed by Pb4+ with the following anions: NO3−, HCO3−, SO42−, H2PO4
Friday, September 25, 2015 by Anonymous

Chemistry
8.00 times10*19 molecules H2O to grams
Friday, September 25, 2015 by Breighton

General Chemistry
lectron configuration of a neutral atom is 1s22s22p63s23p2.      a) Draw the orbital diagram.      b) Write a complete set of quantum numbers for each of the electrons.      c) Name the element.
Friday, September 25, 2015 by sri

Chemistry
How many grams silver is added to 13 grams gold to produce 85% gold alloy?
Friday, September 25, 2015 by Anonymous

Chemistry
How many grams silver is added to 13 grams gold to produce 85% gold alloy?
Friday, September 25, 2015 by Anonymous

Chemistry
Q: 26.30mL of 0.1105 mol/L H3PO4 solution is neutralized by 139.50 mL of KOH. Calculate the mass of solid KOH required to prepare 500.0 mL of this solution. In the previous part of this question, it asked the concentration of KOH and I worked it out to be concentration of KOH ...
Friday, September 25, 2015 by Sarah

chemistry
Use the percent composition of total protein in skim milk to determine the percent of the total protein that is due to the casein fraction.
Thursday, September 24, 2015 by Anonymous

chemistry
based on the mass of lactose that you isolate from 1 mL of skim milk, calculate the percent composition of lactose in skim milk. mass of lactose= 0.28 grams
Thursday, September 24, 2015 by Anonymous

Chemistry
how many gram of Cl are in475g of CaCl
Thursday, September 24, 2015 by Anonymous

CHEMISTRY
sorry! this is the full question: Two samples of sodium chloride were decomposed into their constituent elements. One sample produced 1.78 g of sodium and 2.74 g of chlorine. Which of the following could be the results of the decomposition of the other sample, being consistent...
Thursday, September 24, 2015 by Diana

Chemistry
How does the presence of HCl affect the charges on weak complexes?
Thursday, September 24, 2015 by Lou

Chemistry
How would you know if AgNO3 + Al(NO3)2 forms a precipitate?
Thursday, September 24, 2015 by Jacqueline

Chemistry
Dry air has a density of 1.29g/L (at 25 degrees celsius and 1 atm of pressure). How many liters would 500.g of this air occupy?
Thursday, September 24, 2015 by Mary

CHEMISTRY !!! HELP !
500.0 mL of 0.120 M NaOH is added to 595 mL of 0.250 M weak acid (Ka = 2.95 × 10-5). What is the pH of the resulting buffer? The answer that i got using HH equation is 4.14 but apparently it's wrong. Am I approaching this problem from a different angle ?
Thursday, September 24, 2015 by Owen

Advanced Placement Chemistry
Hey guys! Stuck on some review problems: (My maybe answers are at the end) 1)Which of the following molecules has a nonzero dipole moment? A. CO2 B. H2 C. C12 D. CH4 E. BF3 F. None of the above has a nonzero dipole moment 2) Which of the following would you predict to have the...
Thursday, September 24, 2015 by Allie

CHEMISTRY
what is the proper name for C6H14?
Thursday, September 24, 2015 by Diana

Chemistry
What is the concentration when each of the following is dissolved in 1.50 L of water: a) 3.00 moles of NaCl b) 10 g of KCl c) 110 mg of NaCO3
Thursday, September 24, 2015 by Melanie

Chemistry
Calories to heat 8.1 g of water from 15 Celsius to 34 celsius
Thursday, September 24, 2015 by Famm

chemistry question
how many moles of Ca, O and H are in .600 moles of Ca(OH)2?
Thursday, September 24, 2015 by ad

chemistry
consider the elements;Na,Mg,Cl and F.state with reasons,which element has the highest electronegativity. 2. Arrange with reasons, the elements in decreasing order of ionization energy
Thursday, September 24, 2015 by addo

Chemistry
If the color of a silver nanoparticle remains constant, what does that tell you about the tendency of the particles to aggregate under those conditions? I think the particles won't aggregate, but I am not sure why. Is it because the atoms are moving at a constant rate?
Thursday, September 24, 2015 by A

Chemistry
I need help I do not know how to set up this problem. Calculate the energy to heat three cubes gold aluminum and silver from 15 Celsius to 25 degrees Celsius. Density gold:0.129 J/g degrees C Density aluminum: .896 J/g degrees C Density silver: .235 J/g degrees C
Wednesday, September 23, 2015 by Amber

Chemistry
Separation of a mixture Lab - SiO2, NaCl, NH4Cl So step #7 was: Carefully pour off (decant) the liquid into the second evaporation dish, Adding deionized water in small amounts to the first dish and to stir it, and pour the liquid again into the second dish. Repeating it. The ...
Wednesday, September 23, 2015 by Abby

chemistry
Use your calculated value for the percent composition of total protein in skim milk to calculate the mass of protein that would be present in one serving size (1 cup, 240 ml) of skim milk. 15.6% percent composition
Wednesday, September 23, 2015 by Anonymous

chemistry
Use the percent composition of total protein in skim milk to determine the percent of the total protein that is due to the casein fraction. my percent composition of total protein in skim milk is 15.6%
Wednesday, September 23, 2015 by Anonymous

chemistry
Use the percent composition of total protein in skim milk to determine the percent of the total protein that is due to the casein fraction. my percent composition of total protein in skim milk is 15.6%
Wednesday, September 23, 2015 by Anonymous

Chemistry
Suppose water contained some harmful volatile substance. How could you easily remove the volatile substance in a laboratory?
Wednesday, September 23, 2015 by Z

college chemistry
From your mass of MgNH4PO4.6H2O collected, calculate your value a) for the mass of "P2O5" in the initial mass of fertilizer analyzed b) the % "P2O5" in the fertilizer. Compare this with the manufacturer's specification. Just want to know how i would go ...
Wednesday, September 23, 2015 by ali

Chemistry
The decomposition reaction of A to B has a rate constant of 0.00923 M-1s-1: A → 2B If the initial concentration of A is 0.160 M, how long will it take for the concentration of A to decrease by 68.2%?
Wednesday, September 23, 2015 by Gabby

chemistry
is the following positive in a biuret test? skim milk purified casein purified lactose dextrose
Wednesday, September 23, 2015 by Anonymous

Chemistry
What is the wavelength in nanometers of a photon with a frequency of 6.10 ✕ 10^14 sec-1? (The speed of light in a vacuum is 2.998 ✕ 108 m/s. Planck's constant is 6.626 ✕ 10^-34 J·s.) I know that speed of light = wavelength * velocity, but I don...
Wednesday, September 23, 2015 by Petyon

college chemistry
From your mass of MgNH4PO4.6H2O collected, calculate your value a) for the mass of "P2O5" in the initial mass of fertilizer analyzed b) the % "P2O5" in the fertilizer. Compare this with the manufacturer's specification. Just want to know how i would go ...
Wednesday, September 23, 2015 by ali

Chemistry
Problem: Assume 200.0 mL of 0.400M HCl is mixed with 200.0 mL of 0.400M NaOH in a coffee-cup calorimeter. The temperature of the solutions before mixing was 25.10°C; after mixing and allowing the reaction to occur, the temperature is 27.78°C. What is the enthalpy ...
Wednesday, September 23, 2015 by Michala

Chemistry
If silver has a density of 9.32 g/cm^3 how do you find the length of one side of an 184 g silver cube
Wednesday, September 23, 2015 by Kaleigh

math
in an examination, 31 candidate passed chemistry, 29 passed physics and 3 failed both subject. if 50 candidate sat for the examination, how many of them passed chemistry only?
Wednesday, September 23, 2015 by Anonymous

Chemistry 151
How many moles of chloride ions are in 0.2580 g of aluminum chloride?
Wednesday, September 23, 2015 by Mariah

Chemistry
At 573 K, gaseous NO2(g) decomposes, forming NO(g) and O2(g). If a vessel containing NO2(g) has an initial concentration of 1.9 × 10−2 mol/L, how long will it take for 75% of the NO2(g) to decompose? The decomposition of NO2(g) is second-order in the reactant and ...
Wednesday, September 23, 2015 by Jim

Chemistry 102
What is the freezing point in ∘C of a solution prepared by dissolving 6.60 g of MgCl2 in 110 g of water? The value of Kf for water is 1.86 (∘C⋅kg)/mol, and the van't Hoff factor for MgCl2 is i = 2.7.
Wednesday, September 23, 2015 by Dee

Chemistry
You make a solution using a solute (5g) in water (total volume 100ml). The molar mass of the solute is 110 g/mol. What is the molarity? What is the concentration reported as % by mass?
Wednesday, September 23, 2015 by Judy

chemistry
What is the mass of a liquid that has q volume of 2.5L and a density of 3g/cm cubbed? I got 7.5, but I am unsure if I should have converted L to mL
Wednesday, September 23, 2015 by Chris

Chemistry
You purchased a 5.00 pound bag of sugar (sucrose, C12H22O11) at the grocery last week to bake cookies. Conversion: 1 pound = 1 lb = 454 grams. a.How many grams of sucrose did you purchase? 454 grams (g) = 1 pound (lb) 454 g * 5 = 2270 g A 5 pound bag of sugar is equal to 2270 ...
Wednesday, September 23, 2015 by Chelsea

Chemistry
The reaction 2NO(g) + 2H2(g) N2(g) + 2H2O(g) goes twice as fast when the concentration of H2 is doubled but four times as fast when the concentration of NO is doubled. What is the overall reaction order? I did it like this: k[NO]^m[H2]^n 2r=[H2]^n, meaning that the order for ...
Wednesday, September 23, 2015 by Jim

AP Chemistry
Hey guys! I'm stuck on some study guide problems... (On the bottom of this, I put what answers make sense to me) A) A factor that affects the speed of heterogeneous reactions but not of homogeneous reactions is 1)nature of reactants 2)concentration of reactants 3)area of ...
Wednesday, September 23, 2015 by Allie

Chemistry
An unknown organic compound is 40.00% C, 6.67% H and 53.33% O by mass. The formula weight of the unknown is 90.0g/mole. Find the empirical and molecular formulas for the unknown compound.
Wednesday, September 23, 2015 by Chelsea

Chemistry
How many moles of ammonium ions and how many moles of sulfate ions are contaiuned in a 0.400 mile sample of (NH4)2SO4? Referring to the 0.400 mole sample of (NH4)2SO4 on the previous page, how many atoms of N,H,O, and S, are contained in this sample?
Wednesday, September 23, 2015 by Chelsea

chemistry
Calculate the value of the [Fe3+]/[Fe2+] if 3 cm3 of the 0.05 M Fe3+ solution is added to 25 cm3 of the 0.05 M Fe2+ solution
Wednesday, September 23, 2015 by ronika kumar

chemistry
How would you determine the polarity of the cell after each addition of Fe3+ solution
Wednesday, September 23, 2015 by ronika kumar

chemistry
Calculate the mass of salt needed to prepare 100 cm3 of 0.05 M solution of: (i) Fe(NH4)2(SO4)2.6H2O (ii) FeNH4(SO4)2.12H2O
Wednesday, September 23, 2015 by ronika kumar

chemistry
Calculate the mass of salt needed to prepare 100 cm3 of 0.05 M solution of: (i) Fe(NH4)2(SO4)2.6H2O
Wednesday, September 23, 2015 by ronika kumar

chemistry
CaO(s) reacts with SO2(g) according to the following equations: CaO9(s)+So2(g)--> CaSO3(g). A 8.85g mixture containing CaO(s) is placed in a 3.00-L container. The container is filled with SO2(g) to a pressure of 749 torr, at 20.0 degree Celsius. After the reaction has gone ...
Wednesday, September 23, 2015 by valentine

Chemistry
For the following chemical reaction, how many moles of lead(ii)iodide (PbI2) will be produced from 8 mol of potassium iodide (KI)?
Wednesday, September 23, 2015 by Cindy

chemistry/engineering
Wet sugar, containing one-fifth water by mass is conveyed through an evaporator in which 85.0% of the entering water is vaporized. Taking a Basis of 100 kg of feed to the evaporator A barrel of oil contains about 6 million Btu and about 1000 Btu is needed to evaporate one lbm ...
Tuesday, September 22, 2015 by katy

Gr 12 chemistry
Given the equation: 6C6H12O6+O2= 6CO2+ 6H2O How many moles of carbon dioxide will be formed upon the complete reaction of 24.1 grams of glucose with excess oxygen gas
Tuesday, September 22, 2015 by Avery

Chemistry
How can the concept of changing oxidation states of manganese be used in the real world
Tuesday, September 22, 2015 by Lema

Chemistry
Lets say you have 25 ml of a 3.25M copper(II) chlorate solution. How many moles of copper (II) chlorate would be in the solution and how many moles of the copper(II) ion would be in the solution?
Tuesday, September 22, 2015 by Heather

Chemistry
for each of the following acid-base reactions calculate the mass (in grams) of each acid necessary to completely react with and neutralize 4.85g of the base solution 1)2HNO3(aq)+ Ca(OH)2 (aq)> 2h20(l)+ Ca(NO3)2 2) H2SO4(aq)+ 2KOH(aq)---> 2H2O(l)+ K2SO4
Tuesday, September 22, 2015 by Mark

Gr 12 chemistry
Based on this reaction: H2(g) + I2(g)= 2HI(g) How many moles of iodine are necessary for form 0.530 moles of hydrogen iodine
Tuesday, September 22, 2015 by Avery

Chemistry
What happens when you mix ammonium chloride and sodium nitrate? I don't need any equations, just what would you see when you mix them together Thanks~
Tuesday, September 22, 2015 by Claire

AP chemistry
A certain complex of metal M is formulated as MCl3 ∙ 3 H2O . The coordination number of the complex is not known but is expected to be 4 or 6. (a) Would conductivity measurements provide information about the coordination number? (b) In using conductivity measurements to...
Tuesday, September 22, 2015 by stark11

our lady of fatima university Chemistry
What is the PH of the solution after 25.00 ml of 0.250 M KOH is added to 75.00 ml of 120 M Acetic acid?
Tuesday, September 22, 2015 by Chephira

Science Project suggestions??
I cannot think of an original science project idea. I would really like an original one instead of the online ones which have already have their own procedures and stuff. I would like to do a science project that is has to do with chemistry or computer science. Please help!
Tuesday, September 22, 2015 by Eunice

Chemistry
The number of calories needed to raise the temperature of 32 g of water from 12 Celsius and 54 Celsius is _____.
Tuesday, September 22, 2015 by Destany

chemistry
Consider the reaction: 2 NaBH4(aq) + H2SO4(aq) → 2 H2(g) + Na2SO4(aq) + B2H6(g) What volume, in mL, of a 0.500 M solution of NaBH4 is required to produce 0.529 g of B2H6? H2SO4 is present in excess.
Monday, September 21, 2015 by Bean

chemistry
Gaseous butane CH3CH22CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O . Suppose 36.0 g of butane is mixed with 41. g of oxygen. Calculate the minimum mass of butane that could be left over by the chemical reaction.
Monday, September 21, 2015 by Mike

Biology/ Chemistry
You want to prepare 0.5 L (500mL) of a 0.250M Na2SO4 solution. How many grams of do you need to measure out for the solution? [MW of Na2SO4 = 142 g
Monday, September 21, 2015 by Aileen

Chemistry
The densities of three solutions with known concentrations ( 20% , 50%, and 70%), and one unknown solution were determined. If the densities of 20%, 50% and 70% solutions are 0.69 and 0.58 and 0.49 g/mL, respectively, and the denisty of the unknown solution is 0.50 g/mL, what ...
Monday, September 21, 2015 by Marci

Chemistry
When one mole of C6H6 is burned, 3.27 MJ of heat is produced. When the heat from burning 7.47 g of C6H6 is added to 5.69 kg of water at 21.0°C, what is the final temperature of the water?
Monday, September 21, 2015 by Destany

Chemistry
Calculate the standard free energy of the following reactions at 25C, using standard free energies of formation. a. C2H4(g)  3O2(g) ±£ 2CO2(g)  2H2O(l) b. CaCO3(s)  2H(aq) ±£ Ca2(aq)  H2O(l)  CO2(g)
Monday, September 21, 2015 by nikk

Chemistry 2
Given the following information at 25C, calculate G at 25 degrees Celsius 2A(g)  B(g) ±£ 3C(g) Substance Hf  (kJ/mol) S(J/molK) A(g) 191 244 B(g) 70.8 300 C(g) -197 164 a. -956 kJ b. 956 kJ c. 346 kJ d. 346 kJ e. -1.03 * 10^...
Monday, September 21, 2015 by nikk

Chemistry
1.) It took Beethoven (the composer, not the dog from that movie) 4.5 years to compose the Ninth Symphony (this may not be true, I made it up). How many decades did it take him? 3.) Michael bought a pumpkin that had a mass of 18,165 grams. What was the mass of the pumpkin in ...
Monday, September 21, 2015 by Emily

Chemistry
A mixture of ethane and ethene occupied 35.5 L at 1.000 bar and 405 K. This mixture reacted completely with 110.3 g of O2 to produce CO2 and H2O. What was the composition of the original mixture? Assume ideal gas behavior
Monday, September 21, 2015 by Joseph

Chemistry
2H202-> 2H2O + O2 Suppose you carry out the decomposition using 25.0 mL of a 2.00M hydrogen peroxide solution and obtain the following: 8.62 mL of gas is collected in 120 seconds. How many moles of oxygen are produced per second?
Monday, September 21, 2015 by Jessica

science
chemistry Science.what can be deduced from the temperature change during the different reaction?
Monday, September 21, 2015 by ofentse

sofunda
science chemistry..investigate the reaction of a number of elements and compound with water and classify the reaction as exothermic or endothermic.
Monday, September 21, 2015 by ofentse

Chemistry
Part 1: Find the % by mass of each element in camphor (C10H20O). Step 1: Find the atomic mass of each element in the molecule. Atomic Mass of C: 12.0107 Atomic Mass of H: 1.00794 Atomic Mass of O: 15.9994 Step 2: Find the mass combination of each element. Carbon: 10 atoms 10...
Monday, September 21, 2015 by Chelsea

chemistry HELP!!
Reaction Rate = -(1/2) [d(H2O2)/dt] = [d(O2)/ dt] Using 25 mL of a 0.2 M hydrogen peroxide solution, the following results are obtained from the equation above: 8.62 mL of gas is collected in 120 seconds. (Assume 760 Torr = 1 atm) Room temperature is 25 degrees C and the vapor...
Monday, September 21, 2015 by Aaron

chemistry
How many liters of hydrogen gas are produced during an enthalpy change of -50kJ, assuming STP conditions? 1L= 1kg zn+ hno3 yields znn03 + 1/2 h2 +100kJ -50 kj x (1mol h2/ 100kj) X (2.02g / 1 mol) h2 ) = 1.01 g please help tried to get the answer but it it supposed to be 11.02 ...
Monday, September 21, 2015 by mariam

Chemistry
How many moles of sodium ions are present in a 50.0 g sample of NaCl? Do I use avagadros number?
Sunday, September 20, 2015 by EV

Chemistry
Imagine that you have a stock solution with a concentration of 4.6 M glucose (C1). You want to use the stock solution to prepare a diluted solution of 0.22M glucose (C2). You need a total volume of 10mL of 0.22M glucose (V2). What volume of water you need to use for making 0....
Sunday, September 20, 2015 by Marco

AP Chemistry
An unknown amount of water is mixed with 350 mL of a 6 M solution of NaOH solution. A 75 mL sample of the resulting solution is titrated to neutrality with 52.5 mL of 6 M HCl. Calculate the concentration of the diluted NaOH solution. Answer in units of M I didn't know what...
Sunday, September 20, 2015 by Anonymous

organic chemistry
1. Predict the order of elution of a mixture of triphenylmethanol, biphenyl, benzoic acid, and methyl benzoate from an alumina column. You may need to examine the structural elements in each compound. 2. Once the chromatography column has been prepared, why is it important to ...
Sunday, September 20, 2015 by DONT UNDERSTAND!!

CHEMISTRY
It keeps saying I am wrong! Am I doing the math incorrectly? Problem: Calculate the amount of energy released in kJ/mol for the fusion reaction of two 1H atoms to yield a 2H atom and electron: 1/1H+1/1H→2/1H+0/1e The atomic masses are 0/1e (0.0005486 u), 1H (1.00783 u), ...
Sunday, September 20, 2015 by Rach

Chemistry
Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage of a sample of technetium-99m will remain undecayed after the following times? 18.0 hours 1 day 5 half- lives
Sunday, September 20, 2015 by Anonymous

Chemistry
average atomic mass of isotopes
Sunday, September 20, 2015 by Lisa

Chemistry ! Need help.
A buffer prepared by dissolving oxalic acid dihydrate (H2C2O4·2H2O) and disodium oxalate (Na2C2O4) in 1.00 L of water has a pH of 5.007. How many grams of oxalic acid dihydrate (MW = 126.07 g/mol) and disodium oxalate (MW = 133.99 g/mol) were required to prepare this ...
Sunday, September 20, 2015 by Owen

AP Chemistry
Hey guys! What is the rate constant is particularly sensitive to: 1 A change in volume 2 A change in pressure 3 A change in product concentration 4 A change in reactant concentration 5 A change in the activation energy I feel like it is a change in the activation energy b/c ...
Sunday, September 20, 2015 by Allie

Chemistry
A 0.020 M KMnO4 solution was used to determine the percent iron in a sample containing iron(II). MnO− 4 + 5 Fe2+ + 8 H+ → Mn+2 + 5 Fe3+ + 4 H2O It took 25.0 mL of the KMnO4 to completely react with all the iron(II) in the 0.500 g sample. What was the percent iron(...
Sunday, September 20, 2015 by Child

chemistry
Combustion analysis of 1.0g of a compound containing carbon , hydrogen and oxygen gives 2.3 g of carbon dioxide and 0.93g of water . If The relative molecular mass is 58. Calculate The empirical and molecular formula
Sunday, September 20, 2015 by hiedi

Chemistry
A 39 g of iron ore is treated as follows. The iron in the sample is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 7.9 grams. What was the percent iron in the sample of ore? Answer in units of %. Please help me understand how to ...
Sunday, September 20, 2015 by Alex

chemistry
what is the percent yield of reaction in which 455g of tungsten (VI) oxide (WO3) reacts with excess hydrogen gas to produce metallic tungsten and 9.60 cm^3 of water.(density of water = 1.00 g/cm^3) ???
Sunday, September 20, 2015 by chancy xdicey

chemistry
How is phenol converted into salicylic acid. Give chemical equation?
Sunday, September 20, 2015 by wungmung

Chemistry help
How many moles of Fe3O4 are required to supply enough iron to prepare 0.752 mol Fe2O3?
Sunday, September 20, 2015 by Tina

Chemistry problem
How many moles of UF6 would have to be decomposed to provide enough fluorine to prepare 2.14 mol of CF4? I'm not sure how to solve this problem? So far all I did is calculate the moles of F in CF4, which is 8.56 moles
Sunday, September 20, 2015 by Tina

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