Question

For thousands of years the mineral chalcocite (pronounced KAL-kuh-site) has been a highly prized source of copper. Its chemical composition is 79.85% Cu and 20.15% S. What is the empirical formula of chalcocite?

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Chemistry

Related Chemistry Q&A

Find answers to questions asked by students like you.

Q: Suppose 300 mL of 2.00 M HCl and 300 mL of 2.00 M NaOH, both initially at 23.0 celsius, are mixed in...

A: Given data:

Q: Question 2

A: The total mass of solution is calculated as,

Q: Most of us have had a glass of water from a Brita® pitcher. What is inside of a Brita® filter cartri...

A: The Brita filter cartridge is composed of copolymer of styrene methyl methacrylate.

Q: erences) Draw a structural formula of the SR configuration of the compound shown below. CH3 S NR HO ...

A: According to Cahn-Ingold-Prelog system,The group attached to asymmetric center should be ranked base...

Q: What is the percentage of C2H2 when 50.0 g of CaC2 reacts whith an excess of water to yield 13.5g C2...

A: Click to see the answer

Q: Calculate ΔH° for the process Sb(s) + 52Cl2(g) ⟶ SbCl5(s) from the following information: Sb(s) ...

A: According to the Hess’s law of Constant heat Summation, regardless of the number of steps or stages ...

Q: question 9. predict the product of the following reaction

A: The given  reaction is

Q: Suppose a 250.mL flask is filled with 0.80mol of CO, 0.60mol of NO and 0.20mol of CO2. The following...

A: The initial concentrations of CO, NO and CO2 are calculated as shown below.250 mL = 0.250 L

Q: A simple equation that can be used ONLY for dilutions is M1V1 = M2V2.  So if a concentrated solution...

A: Given,M1= 1.36 MM2 = 0.286 M V2 = 50.0 mL

Q: What is the correct name for P4O10?

A: The empirical formula for P4O10 is P2O5.

Q: Question 4

A: The combustion of propane is given as,

Q: How much heat is required to convert solid ice with a mass of 930 g at a temperature of -10.0 °C to ...

A: The specific heat capacity for a given chemical substance or a solution refers to the amount of the ...

Q: If 37.23 mL of a sodium hydroxide solution is required to titrate 2.34 g of KHP, to the endpoint, wh...

A: The reaction between NaOH and KHP is given below.

Q: A chemistry graduate student is given 450.mL of a 1.20M propanoic acid  (HC2H5CO2) solution. Propan...

A: Click to see the answer

Q: What geometric shape is C2H6O

A: The structure for the C2H6O

Q: Balance the combustion reaction in order to answer the question. Use the lowest whole‑number coeffic...

A: The balanced chemical reaction is given below.

Q: Dry ice is solid carbon dioxide. Instead of melting, solid carbon dioxide sublimes according to the ...

A: Dry ice sublimation is:

Q: Each day, the stomach produces 2.0 L of gastric juice that contains 0.10 M HCl. Phillips Milk of Mag...

A: Given that the volume of gastric juice produced is 2L.The molarity of HCl present in gastric juice i...

Q: Calculate the change in entropy when one mole of metallic aluminum is heated at one bar pressure fro...

A: Enthalpy of fusion for 1 mole of Al is 10699.45 J/molInitial temperature = 25 degC = 298.15K KFinal ...

Q: Orbital Notes.pdf Mail Sydney. Brown@stma b My Questions bartleby 6.8 Extensions of Electro X Colleg...

A: Cobalt in the given complex has +3 oxidation state and with this oxidation state, the electronic con...

Q: How many moles of ammonia would be required to react exactly with 0.764 moles of copper(II) oxide in...

A: The balanced reaction can be given as

Q: How do I answer these questions? How do I figure them out?

A: Displacement reactions are those reactions in which a highly reaction element displaces less reactiv...

Q: A sample of argon gas at standard pressure occupies 1000 ml. At constant temperature, what volume do...

A: Click to see the answer

Q: Given the following equilibrium system: 2SO2(g) + O2(g) ↔ 2SO3(g) + 99.1 kJ A catalyst is added to t...

A: According to Le Chatelier’s principle, when an equilibrium system is disturbed by changing condition...

Q: Suppose 8.50g of potassium acetate is dissolved in 250.mL of a 0.30 M  aqueous solution of sodium ch...

A: It is given that potassium acetate is dissolved into sodium chromate solution.Volume of sodium chrom...

Q: What is the molarity of a solution that contains 476.9 grams of phosphoric acid, H3PO4, in 1.2 L of ...

A: GivenMass of phosphoric acid= 476.9g

Q: Help

A: the best fit line of the graph is 

Q: Please answer the question in the picture that is attached.  thank you so much :)

A: As per the Hess’s law of Constant heat Summation, regardless of the number of steps or stages that h...

Q: For the aqueous [Cu(NH3)4]^2+ complex =Kf=5.6x10^11 at 25°C.Suppose equal volumes of 0.0058M Cu(NO3)...

A: The overall formation constant for the reaction is shown in equation  (1) in which Kf is the overall...

Q: The temperature rises from 25.00°C to 29.00°C in a bomb calorimeter when 3.50 g of sucrose undergoes...

A: Given,Mass of sucrose = 3.50g

Q: 1. Acetate buffers are used in biochemical studies of enzymes and other chemical components of cells...

A: GivenKa= 1.8 x 10-5pKa= 4.745concentration of acetic acid= 0.20Mconcentration of sodium acetate= 0.2...

Q: What is the volume of a 0.071 M CaBr2 solution made from 9.15 g of solute?

A: The molarity of a solution is the ratio of number of moles of a substance to the volume of solution ...

Q: Question 1

A: The specific heat capacity for a given chemical substance or a solution can be defined as the amount...

Q: A bright violet line occurs at 435.8 nm in the emission spectrum of mercury vapor. What amount of en...

A: Given:Wavelength λ = 435.8 nm

Q: Liquid hexane (CH3(CH2) CH3will react with gaseous oxygen (02) to produce gaseous carbon dioxide (CO...

A: The mass of product formed in a chemical reaction depends upon the amount of limiting reactant. Limi...

Q: I need help understanding and solving the following problem:A 30.0 mL analyte is made up of 0.155g o...

A: At equivalent point, the number of moles of monoprotic acid is equal to the number of moles of NaOH....

Q: Given the following equilibrium system: 2SO2(g) + O2(g) ↔ 2SO3(g) + 99.1 kJ The pressure on the syst...

A: According to Le Chatelier’s principle, when pressure increases system will shift to the direction ha...

Q: Write mechanism of chain radical reaction of 2-methyl-2-butene in HBr and peroxide ROOR.

A: The reaction of 2-methyl-2-butene in HBr and peroxide ROOR is shown below.

Q: Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.3...

A: Given:Frequency ( ν)  = 6.32 × 1014 Hz.c = 3 X 108 m/sCalculate the wavelength(λ) (in nm) ?

Q: What is the maximum mass of S8 that can be produced by combining 76.0 g of each reactant? 8SO2+16H2S...

A: Mass neither be created nor destroyed in a chemical reaction. Mass can be calculated in a balanced c...

Q: The following mechanism has been proposed for the gas-phase reaction of chloroform (CHCl3) and chlor...

A: The three step mechanism of the given reaction is,

Q: Suppose you are investigating the reaction: M(s) + 2 HCl(aq) → MCl2(aq) + H2(g). You weigh out a 0.1...

A: The given reaction is written below.M (s) + 2HCl(aq) → MCl2(aq) + H2(g) The relation between millili...

Q: Question 1

A: Balanced chemical equation of a reaction is written according to law of conservation of mass. Thus, ...

Q: The following chemical reaction is an/a    _______ reaction? 2C2H5OH(l) + 7O2(g) → 4CO2(g)+ 6H2O(g)+...

A: The given reaction is

Q: A solution is made by dissolving 8.55 g of KClO3 into enough water to make 295 mL of solution. What ...

A: Molarity can be obtained by the given equation below:

Q: A 2.06 M NaNO3 solution has a volume of 9.16 L. It is diluted to a volume of 29.484 L. What is the m...

A: Volume can be determined using the dilution expression,

Q: How many moles of Al are necessary to form 25.8 g of AlBr₃ from this reaction: 2 Al(s) + 3 Br₂(l) → ...

A: The conversion is like:Grams of aluminum bromide to moles of aluminum bromide to moles of bromine to...

Q: Calculate the amount of heat needed to boil 166.g of ethanol (CH3CH2OH), beginning from a temperatur...

A: Boiling point of ethanol is 78.37 °C.The change in temperature taking place is,

Q: A 26.4-mL bubble is released from a diver 's air tank at a pressure of 4.41 atm and a temperature of...

A: Convert the unit of temperature:

Q: Calculate the solubility at 25°C of CaF2 in pure water and in a 0.0060M  NaF solution. You'll find K...

A: The equation can be written as follows,