Copper (II) fluoride contains 37.42%by mass. Calculate the mass of fluorine(in grams)contained in 55.5 g of Copper(II) Fluoride

64,247 results
  1. 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?

  2. Chemistry

    A certain mine produces 2.5 108 kg of copper from chalcopyrite (CuFeS2) each year. The ore contains only 0.80% Cu by mass. (a) If the density of the ore is 2.0 g/cm3, calculate the volume of ore removed each year. (b) Calculate the mass of SO2 produced by

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  4. Chemistry

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  5. Science

    Which objects will sink or float if the density of pure water is1/gm or 1gm/cm3. The following of the following objects will sink or float if the mass, volume, and density of the objects are: Small sized block : mass=4.5 grams, volume=2.744 cm3, density:

  6. chemistry

    A piece of nickel foil, 0.550 mm thick, 1.25 cm width and 1.00 cm long, is allowed to react with fluorine, F2 to give a nickel fluoride. Density of nickel is 8.908 g/cm3. How many moles of nickel foil were used? If you isolated 1.261 g of nickel fluoride,

  7. chemistry

    8.What is the mass of 4.56 moles of sulfur dioxide? 9.What is the mass of 4.56 molecules of sulfur dioxide? 10.How many formula units are in 0.456 grams of Ca3(PO4)2? 11.How many moles are in 1.5 x 10 ^23 atoms of fluorine? 12.What is the mass of 2.80 x 10

  8. Chemistry

    1. What is the percent by mass of a solution that contains 50 grams of solute dissolved in 200 grams of solution? What is the concentration of the same solution in parts per million? 2. What is the percent mass of a solution that contains 75 grams of salt

  9. Chem

    Copper(II) fluoride contains 37.42% F by mass. Use this % to calculate the mass of fluorine in grams contained 28.5 g of copper (ii) fluoride

  10. chemistry

    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

  11. physical science 8th grade

    Copper has 2 known isotopes: ^63CU atomic mass= 62.9298 and ^65 CU atomic mass=64.9278. The average atomic mass of copper is 63.546 amu. Calculate the fraction(percent) of each of the 2 isotopes of copper

  12. 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

  13. epic

    A copper penny has a mass of about 4grams. A copper kettle has a mass of about 400 grams. What is true about the density of these two objects?

  14. chemistry

    A nickel has a mass of 5.000 grams and is composed of 25% nickel and 75% copper. What is the mass of copper in the nickel? How many moles of copper are in this nickel? How many copper atoms are in this nickel?

  15. 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

  16. chemistry.

    A student was asked to make some copper(II) sulfate-5-5 (CuSO4.5(H2O) BY reacting copper(II) oxide (CuO) with sulfuric acid. a) Calculate the molar mass of the copper (II) sulfate-5-water which is (64+32+64) + (10+80)=250 mol b)Calculate the amount (in

  17. Chemistry

    2Na+F2=2NaF if 20.0 g of sodium is used what mass of sodium fluoride could be produced assuming that fluorine gas is unlimited

  18. Chmistry

    A sample of copper with a mass of 63.5g contains 6.02x10^23atoms.Calculate the mass of a single copper atom.

  19. Physics

    The density of copper is 8.96 g cm^−3 and its molar mass is 64 g mol^−1. Calculate the mass of 1 atom of copper.

  20. physics

    a) 2.0 kg of molten copper at its melting point of 1083 ºC (the copper is 100% liquid) is poured into a mold in a cooling water bath at 20 ºC. What mass of water is needed to bring the solidified copper and water to an equilibrium temperature of 30 ºC,

  21. 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

  22. chemistry

    What mass in grams of potassium hydroxide is contained in 500 mL of solution that has a pH of 11.5? I have a pOH of 2.5 to get [OH] I do 10^-2.5 to get 0.001581138 Then I divide this by 2 to find the mols in 500 mL Then, grams = mols x molar mass =

  23. chemistry

    Q1.A compound of copper and sulphur is 65.43percent copper by mass.how many grams of copper can be obtained from 249g of this compound?and how many grams of sulphur remain?

  24. chimestry

    more volume of NaOH means more moles of NaOH (volume * molarity = mole ; molarity=constant) , more moles of NaOH means more grams and mole of HCl and more grams and/or mole and/mass of M2CO3 (note that they are both on the same side of the reaction) now

  25. Chemistry

    A water treatment plant adds fluoride ion to the water to the extent of 1.5mg F-/L H2O. a)What is the molarity of fluoride ion in this water? b)If the fluoride ion in the water is supplied by calcium fluoride, what mass of calcium fluoride is present in

  26. Chemistry

    Copper (II) fluoride contains 37.42%by mass. Calculate the mass of fluorine(in grams)contained in 55.5 g of Copper(II) Fluoride.

  27. chem

    Use this percentage to calculate the mass of fluorine in grams contained in 29.0 g of copper (II) fluoride

  28. 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

  29. chemistry

    copper (II) flourine comtains 37.42 % of mass. use this percentage to calculate the mass of flourine in grams contained in 28.5 g of copper (II) flourine

  30. 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

  31. chemistry

    calculate the mass in grams of copper that will be deposited by dissolving 6.5g of zinc in copper tetraoxosulphate(vi)solution

  32. 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

  33. chemistry

    The element copper has naturally occuring isotopes with mass numbers of 63 and 65. The relative abundance atomic masses are 69.2% for mass=62.93 amu, and 30.8% for mass=64.93 amu. Calculate the average atomic mass of copper.

  34. Chemistry

    Calculate the molar masses of copper (II) nitrate trihydrate and of the precipitate formed by this reaction. Are these steps right? Molar mass of Copper: (Cu 2+) 63.55 Molar mass of Nitrate: (NO3 -) 62.01 Copper(II) Nitrate Formula = Cu(No3)2 Molar Mass of

  35. physics

    The British Sovereign coin is an alloy of gold and copper having a total mass of 7.988 g and is 22-karat gold. (a) Find the mass of gold in kg using that # of karats = 24 x (mass of gold)/(total mass). (b) Calculate the volumes of gold and copper used to

  36. Physics

    A piece of copper ball of mass 20g at 200°c is placed in a copper calomiter of mass 60g containing 50g of water at 30°c ignoring heat losses.calculate the final steady temperature of the mixture

  37. CALCULUS

    The masses of 10 books are found to be in an arithmetic sequence. If their total mass is 13 kg and the lightest book has a mass of 400 grams, what is the mass of the heaviest book? 2,000 grams 2,100 grams 2,200 grams 2,300 grams 2,700 grams

  38. 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?

  39. Physics

    A piece of copper of ball of mass 20g is placed in a copper calorimeter of mass 60g containing 50g of water at 30 degree Celsius ignoring heat losses, calculate the final steady temperature of the mixture. (SHC of water = 4.2j/g/k)

  40. Science

    My physical science class is doing an experiment on the mass of pennies. I hypothesized that newer pennies would have less mass because cheaper materials are being used. I found that before 1982, pennies were made from 95% copper/5% zinc, and after 1982

  41. chemistry

    Copper (2) fluoride contains 37.42% F by mass. calculate the mass of fluorine (in grams) contained in 35.6 g of copper(2) fluoride.

  42. chemistry

    Copper (2) fluoride contains 37.42% F by mass. calculate the mass of fluorine (in grams) contained in 35.6 g of copper(2) fluoride.

  43. chemistry

    Copper (II) fluoride contains 37.42% {\rm F} by mass. Use this percentage to calculate the mass of fluorine (in {\rm g}) contained in 56.0{\rm g} of copper (II) fluoride

  44. Chemmistry

    Use this percentage to calculate the mass of fluorine (in g) contained in 54.0 g of copper (II) fluoride.

  45. chemistry

    Copper (II) flouride contains 37.42% F by mass. Use this percentage to calculate the mass of flourine (in grams) contained in 35.6 g of copper (II)fluoride. --- How many grams of Cl are present in 55g of CFCl3?

  46. Chemistry

    Part 1 : a.) How many grams of Hydrogen will be contained in a 100.000 g sample of magnesium hydroxide.? c.) How many grams of nitrogen will be contained in a 120.0 g sample of calcium cyanide? ________________________________________ Part 3: d.) How many

  47. chemistry

    A particular brand of toothpaste claims to contain 0.24 wt% sodium fluoride. What mass in grams of fluoride ion would be present in the average amount of toothpaste used to brush one's teeth, about two grams? Now this is a weight percent concentration

  48. Chem

    When 5.49 g of platinum reacts with an excess of fluorine, 7.65 g of platinum(_) fluoride forms. a. What is the mass of fluorine in the compound? b. Find the number of moles of platinum that reacted. c. Find the number of moles of fluorine that reacted. d.

  49. Chemistry

    Copper (II) fluoride contains 37.42% F. Given this information, determine the mass of fluoride in 70.23 g of copper (II) fluoride.

  50. Chemistry Basic

    Hello I understand How to do empirical problems, but the way this problem is worded has me so confused. when 1.00g lithium metal is reacted with fluorine gas, the RESULTING COMPOUND has a mass of 3.73g. Calc the emprical fromula of lithium fluoride. I know

  51. 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

  52. Chemistry

    I cannot understand how the mass of the system has changed. There's no need for you to do my work please just explain it to me! :) thanks so much A scientist placed copper powder into a crucible and heated it until all of the copper reacted. The resulting

  53. OAKLAND

    Using mass percentages:- The American Dental Association recommends that you should consume 3.0 mg of fluoride a day. If you get your fluoride in the form of sodium fluoride, what mass of sodium fluoride should you ingest?

  54. CHEM

    Using mass percentages:- The American Dental Association recommends that you should consume 3.0 mg of fluoride a day. If you get your fluoride in the form of sodium fluoride, what mass of sodium fluoride should you ingest?

  55. chem

    The mass of the CuSO4 x 5H2O sample is 1.664 g. The mass of the recovered copper is 1.198 g. Calculate the percent copper in pure copper sulfate pentahydrate(this is the theoretical percent copper). One mole of copper has a mass of 63.55 g, and by

  56. Physics

    A piece of copper ball of mass 30grams at 150 degree celcius is placed in a copper calorimeter of mass 70gams containing 60grams of waterof copper 40degree celcius if the final ofthe mixture is 50degree celcius calculate the specific heat capacity of

  57. chem

    I have a few questions on how to do a few problems that I got wrong for homework. 1. If 5.28 g of tin reacted with fluorine to form 8.65 g of a metal fluoride, what is the simplest formula of the fluoride? I know my biggest problem here was that I misread

  58. chemistry

    using your initial mass of copper, calculate the minimum volume of concentrated 12M nitric acid needed to completely react with your copper to form copper(II) nitrate? Original mass of copper was 0.40g.

  59. chem

    The mass of the CuSO4 x 5H2O sample is 1.664 g. The mass of the recovered copper is 1.198 g. 1. Compute the experimental percent by mass of copper in the sample: 1.1664/1.998x 100=71.81% 2. Calculate the percent copper in pure copper sulfate

  60. Chemistry

    calculate the mass percent of sand, sodium chloride and copper(ll) sulfate in a sample that yields: mass of sample= 14.088g, mass of sand=0.2255g, mass of copper(ll)oxide = 0.1994g (assume 100% yield for each of the copper(ll) reactions) CuSO4(aq) +

  61. 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

  62. physics

    A piece of copper of mass 40 grams at 20 degrees Celsius is placed in a copper calorimeter of mass 60 grams containing 50 grams of water at 10 degrees Celsius .ignoring heat losses,what will be the final steady temperature after stirring?(specific heat

  63. chemistry

    Let's say for example I have 5g of copper in a beaker. Mass would be 5g + mass of beaker. If I add any given amount of water to the beaker containing the copper, that will change the mass of the beaker containing the copper. Am I correct so far? So then if

  64. Science

    Calculate the mass percent of sand, sodium chloride and copper (II) sulfate in a sample which yields the following data: mass of sample = 1.088g, mass of sand = 0.2255g, mass of copper (II) oxide = 0.1994g (assume 100% yield for each of the copper (II)

  65. chem

    An experimental alloy contained by copper and tantalum. 3.7950 g of the alloy was dissolved and analyzed gravimetrically. The copper was precipitated and weighed as CuO, a mass of 0.1805 g was obtained. Calculate the %w/w Cu in the alloy. [Answer in 2

  66. Chemistry

    The element copper, found in nature with an average atomic mass of 63.54u, consists of two isotopes, copper-63 of atomic mass 62.93u and copper-65 of atomic mass 64.93u. Calculate the abundance of each isotope. I can't come up with an equation to solve it;

  67. Please help with really hard chem question?

    An electrolysis experiment was run for 17.5 minutes at an average current of 191 milliamps (mA). The mass lost by the copper anode was 0.0679 grams. a) Calculate the number of coloumbs transferred. (coloumb=ampsxsec) b) Calculate the moles of copper lost

  68. science

    350g ofwater at 30 degree celcius is contained in a copper vessel of mass 50g. Calculate the mass of ice required to bring down the temperature of the vessel and its content at 5 degree celcius.

  69. chemistry

    A 2.00 gram sample of Copper (II) acetate produced 2.48 grams of a Copper (II) Formate Hydrate. After heating the sample the final mass of the Copper (II) Formate was 1.69 grams. What was the degree of hydration for the Copper (II) Formate?

  70. chem

    if the mass of a copper wire before an experiment wieghed 2.82 grams then after it wieghed 2.57 grams. what is the mass of copper that reacted

  71. Chemistry

    How do I calculate the percent yeild of copper give the mass and concentration of Cu(NO3)2 and the final mass of copper

  72. Chemistry

    Given this equation, 2Al + 3CuCl2 * 2H2O → 3Cu + 2AlCl3 + 6H2O How do I calculate the theoretical yield of copper with the mass of Copper II chloride dihydrate as 2.40g and the mass of Copper as 1.40g? Then the percentage yield?

  73. 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

  74. Chemistry

    A toothpaste contains 0.220 % by mass sodium fluoride used to prevent dental caries and 0.32 % by mass triclosan C12H7Cl3O2, an antigingivitis agent. One tube contains 119 g of toothpaste. How many fluoride ions, F−, are in the tube of toothpaste? How

  75. Chemistry

    I was doing a lab and stared off with 10mL of HNO3 and the mass of copper which was 1.5120g. The question now is: With initial mass of copper wire being 1.5120g, calculate the volume of (16M) nitric acid that is required to fully react with the copper.

  76. Chemistry

    A total charge of 96.5 kC is passed through an electrolytic cell. Determine the quantity of substance produced in each of the following cases. (a) the mass (in grams) of silver metal from a silver nitrate solution (b) the volume (in liters at 273 K and

  77. Chemistry

    A sample of calcium fluoride with a mass of 15.0 g contains 8.40 g of calcium. Assuming that the sample is pure calcium fluoride, how much calcium would be present in a 30.0 g sample? My answer: 16.8 g Ca Based on your answer and applying what you know

  78. Chemistry

    Upon decomposition, one sample of Magnesium Fluoride produced 1.65 kg of magnesium and 2.57 kg of fluorine. A second sample produces 1.33 kg of magnesium. How much fluorine (in grams) did the second sample produce?

  79. chemistry

    Lab on Determination of copper in brass. I have mass of brass at .1011g. My concentration of diluted solution's unknown is .0037957, My concentration of mg/ml Cu^2+ unknown is 241.2. My professor is asking me to determine the percent of copper. I know that

  80. chem

    the tsp of magnesium fluoride is 3.7x10^-8.When 400.0 ml of 0.600 M NaF is mixed with 600. ml of 0.217 M Mg(NO3)2, a precipitate forms. (a) what mass of megangsim fluoride(M MASS=62.30g/mol) is produced ? (b) what will be the equilibrium concentrations go

  81. Chemistry

    A 2.612 g sample of a copper oxide, when heated in a stream of H2 gas, yields .592 g H20. What is the formula of the copper oxide? Again, I need help with this problem. Answer = CuO Ok nvm.. i got it. Set up the reaction as best we can surmise at the

  82. Chemistry

    In chemistry, we did a lab in which we had a certain mass of copper, performed multiple experiments on the copper, and at the end, extracted the copper from a solution and weighed it. The goal was that the mass of the final copper should be the same as the

  83. 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?

  84. 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?

  85. chemistry

    Upon decomposition, one sample of magnesium fluoride produced 1.66kg of magnesium and 2.56kg of fluorine. A second sample produced 1.29kg of magnesium. How much fluorine (in grams) did the second sample produce?

  86. Chemistry

    The atomic mass of CU 63 is 62.9296 amu with a natural abudance of 0.692. The average mass of copper is 63.546amu.What is the mass of copper's other isotope?

  87. science

    Copper crystallizes in a face centered cubic lattice . Calculate the nmber of unit cell in 1.2 g of copper atomic mass of copper is 63.5 u

  88. Chemistry

    4) Using your initial mass of copper (0.38), calculate the minimum volume of concentrated 12M nitric acid needed to completely react with your copper to form copper (II) nitrate 5) Using your answer from question 4 (2x10^-3 L), calculate the minimum volume

  89. chemistry

    quarters are 91.67% mass/mass copper and 8.33% mass/mass nickel. if the average quarter weighs 5.67 grams, how many atoms of nickel are in a quarter?

  90. chemistry

    quarters are 91.67% mass/mass copper and 8.33% mass/mass nickel. if the average quarter weighs 5.67 grams, how many atoms of nickel are in a quarter?

  91. Chemistry

    determine how much copper you will use. based on the mass of silver nitrate, calculate how much copper will you need to ensure copper is the excess reactant. you need to use 300% excess copper. Help me please!

  92. chemistry

    Calculate the current that must be passed into a solution of copper(ii)salt for 70sec in order to deposit 29gram of copper metal which atomic mass of copper is for 64

  93. chemistry

    Copper has two naturally occurring isotopes. Cu-63 has a mass of 62.939 amu and relative abundance of 69.17%. Use the atomic weight of copper to determine the mass of the other copper isotope.

  94. CHEMISTRY

    HOW MANY GRAMS OF LITHIUM DO YOU NEED TO REACT WITH 2.5 X 10^24 FLUORINE MOLECULES TO PRODUCE LITHIUM FLUORIDE?

  95. Physics

    The density of copper is 8.96 g cm^−3 and its molar mass is 64 g mol^−1. The mass of an atom of copper is 1.1*10^-22 g Determine the number of copper atoms per cubic metre.

  96. chemistry

    a 3.00mole sample of fluorine reacts with sodium bromide to produce how many grams of sodium fluoride?

  97. 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?

  98. 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?

  99. chemistry stoichiometry

    My chem teacher gave us this problem Twelve-gauge copper wire,like the kind commonly used in residential electrical systems, is roughly cylindrical and has a diameter of approximately .1040in. Copper's density is 8.92g/cubic cm and copper atoms have an

  100. Chemistry

    When potassium cyanide reacts with acids a deadly poisonous gas hydrogen cyanide is produced calculate the mass in grams of hydrochloric acid molar mass 36.46 grams per mole needed to completely react with 0.140 grams of potassium cyanide molar mass 65.12

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