Brass is an alloy of copper (8.92 g cm–3) and zinc (7.14 g cm–3). A 208.3 g piece of brass has a volume of 25.0 cm–3. What is the mass percent of copper in the alloy?   Question 13 options:   72.4%   66.9%   78.0%

Q: There are many minerals which contain silver. A 2.22 g sample of one of these, matildite, is placed…

A: The reaction between silve and magnesium chloride for analysis of Ag in matildite . 2 Ag + MgCl2 → 2…

Q: A student asked to prepare 2.5 L of a 3.5 M CuSO4 solution. The student placed 400.0 grams of CuSO4…

A: Calculate the number of moles of copper (II) sulfate present in 2.5 L of 3.5 M solution. n = C ×…

Q: In the US, alcohol proof is equal to twice the percent of alcohol (ethanol) by volume, so for…

A: Percentage volume by volume: is one of the ways to express concentration of solution. Formula is:…

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A: Combustion reactions of methanol is 2CH4O+3H2O→2CO2+4H2O 2 mole of methanol is producing 2 moles of…

Q: Napeleon doesn’t think the water is clean enough at the water park “Waterloo”.  In an effort to…

A: Use stoichiometry of the reaction to get the answer. Mass= density×volume

Q: None

A: Solution: mass of CuF2 = 0.070 g moles of CuF2 = 0.070 / 101.54 = 6.89 x 10^-4 mol volume = 200 mL =…

Q: Milk of Magnesia is an over-the-counter medication that contains magnesium hydroxide Mg(OH)2.  In…

A: Molarity of the solution is the number of moles of solute present in one liter of solution. It is…

Q: An aqueous solution known as Ringer's lactate is administered intravenously to trauma victims…

A:

Q: Q6. What is the radius (in cm) of a cylindrical silicon block (density = 2.03 g/cm3) with the height…

A: The radius of cylindrical silicon block can be easily determined by its density and the total mass…

Q: A surgeon removed a deposit of cholesterol, C27H46O, from a patient's artery. Determine the number…

A: Given Amount of  removed = 3.90 mg = 3.90 * 10-3 g No of Molecules of cholesterol removed = to be…

Q: 50 mL of a 0.9 Ca3(PO4)2 solution is added to a beaker.  How many moles of Ca3(PO4)2 were added?…

A: Molarity = Number of moles /volume of solution in Litre  Number of moles = weight in grams/ Molar…

Q: A chemist must dilute 97.1 mL of 1.81 M aqueous aluminum sulfate (Al₂(SO4)3) solution until the…

A: To solve this problem we have to use the formula of dilution. Which is given as  M1V1 = M2V2  where,…

Q: (optional) Blue turquoise is an example of a hydrate mineral containing copper; the chemical formula…

A: Mass percentage of any component may be calculated as, Mass percentage = mass of the component total…

Q: A chemist prepares a solution of silver(I) perchlorate (AgCIO4) by measuring out 817. μmol of…

A: Given, Moles of silver perchlorate = 817 μmol Volume = 450 mL

Q: Another student performed the same percent composition of a hydrate experiment, but kens the…

A: 3a. The experiment was the determination of percent composition of hydrate.

Q: Which of the following is not intensive property? O density O boiling point O melting point O volume

A: Intensive property : It is a thermodynamic property that does not depend on the amount or quantity…

Q: A chemist adds 130.0 mL of a 3.9M silver perchlorate (AgCIO4) solution to a reaction flask.…

A: Volume of AgClO4 = 130.0 mL   = 0.13 L        ( 1 mL = 0.001 L)Molarity of AgClO4 = 3.9 mol/L…

Q: A pool cleaning solution is mixed from three different bottles of solution. The first bottle…

A:

Q: The following chemical equation has NOT been balanced.   H3PO4 + Ca(OH)2 --> Ca3(PO4)2 + H2O…

A: Given, mass of H2O = 17.94 g  Molar mass of H2O = 18.01 g/mol  Molar mass of Ca(OH)2 = 74.09 g/mol

Q: A sample of feldspar (feldspars are the most abundant mineral group on Earth) was analysed that…

A: From a sample of feldspar weighing 1.0600 g, a mixture of chlorides of sodium and potassium was…

Q: In the “Methodé Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine.…

A: 750 ml Of grape juice is allowed for fermentation untill 12.5% by volume of ethanol. Density of…

Q: 9.66 x 10-3 grams of CaCO3 were present in a 5.00 mL sample of water, how many grams of CaCO3 are in…

A:

Q: concentration in n

A:

Q: 7) How many kilograms is a 27 oz. bag of M&M's? 8) How many kilometers can a car travel on 19…

A: Answer 7) 1 oz = 0.02835 kg 27 oz  =27*0.02835 kg  = 0.76545 kg so answer is 0.77 kg   Answer 8) 1…

Q: A student placed 18.5 g of glucose (C6 H12O6) in a volumetric flask, added enough water to dissolve…

A: Given: Mass of glucose in the initial solution = 18.5 g.Volume of initial solution = 100 mL Volume…

Q: Ascorbic acid (C₆H₈O₆) is also known as Vitamin C. How many molecules of C₆H₈O₆ does a Vitamin C…

A:

Q: Practice 2-2 A solution is prepared by dissolving 2.00 kg of solute is enough solvent to make 50.0…

A: Here I have solved for the percentage concentration of the solution

Q: Silicon used in computer chips must have an impurity, level below 10 9 (that is, fewer than one…

A: In the given question we have to calculate the ratio of B atoms to Si atoms.The following data is…

Q: A chemist prepares a solution of potassium chloride (KCI) by measuring out 75.7 mg of KCI into a…

A: Given Mass of kcl = 75.7 mg = 0.0757 g Volume of solution = 100ml = 0.1L

Q: A chemist prepares a solution of mercury(II) iodide (Hgl,) by measuring out 0.00569 µmol of…

A:

Q: themist prepares a solution of potassium chloride (KCl) by measuring out 43. mg of KCl into a 50. mL…

A:

Q: 2. You are provided with KIO3, how much do you need to weigh out and in what volume to give you what…

A: To prepare a solution of potassium iodate (KIO3) with a molarity of 4.167 x 10-3 M, you would need…

Q: Aspirin can be prepared from salicylic acid (C7H6O3), which has a molar mass of 138.12 g/mol, and…

A: Given reaction: C7H6O3+C4H6O3⟶C9H8O4+C2H4O2 We have to find the yield of aspirin when 2.10 g of…

Q: Chemical Formulas as Formulas: Converting between Grams of a Compound and Gram of a Constituent…

A: First convert given mass in kg  into grams .

Q: Question 11: You are a gemstone expert studying samples of various materials. Gemstone Hambergite…

A: From the given gemstones, the most massive gemstone is = Smoky Quartz (density = 2.65 g/mL) The…

Q: A chemist adds 390.0mL of a 8.14*10^−5M zinc oxalate ZnC2O4 solution to a reaction flask. Calculate…

A: We have to first calculate moles of zinc oxalate

Q: The transparent form of beryl (molecular formula = BegAl2Si6O18) that is green is called emerald.…

A:

Q: A chemist prepares a solution of potassium bromide (KBr) by measuring out 1.75 g of KBr into a 250.…

A: Mass of KBr = 1.75 g  Volume of solution = 250 mL = 0.25 L

Q: How many grams of salicylic acid (C>H6O3) is needed to prepare a 1.050 m using 550.00 g water? (Type…

A:

Q: What is the mass percent of water in Ca(NO3)2·4 H,O? Provide an answer to two decimal places.

A: The compound given is Ca(NO3)2.4H2O. Assuming 1 mole of compound.

Q: A chemist adds 145.0mL of a 0.0145/molL potassium dichromate K2Cr2O7 solution to a reaction flask.…

A:

Q: 1. Calculate the theoretical percentage of water for the following hydrates. (a) manganese(II)…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A chemist prepares a solution of aluminum sulfite (Al, (Al₂(SO3)3) by measuring out 56.8 μmol of…

A: Given, moles of Aluminium sulfite (Al2(SO3)3) = 56.8 µmol = 56.8 × 10-6 mol Volume of the volumetric…

Q: Aspirin can be prepared from salicylic acid (C,HO3), which has a molar mass of 138.12 g/mol, and…

A: Calculate moles of Salicylic acid- Mass = 2.25 g Molar mass = 138.12 g/mol Therefore, Moles of…

Q: A chemist adds 390.0 mL of a 0.149M potassium permanganate (KMnO4) solution to a reaction flask.…

A: Since, Molarity is the number of moles of solute dissolve in one litre of the solution. Thus,

Q: 5) King Krator the Merciless has called on Pogo, a humble goldsmith, to make a crown for the King.…

A: The mass of gold given by King Krator to gold Smith Pogo is ---- 14 oz. The density of gold=19.3…

Q: What is the maximum amount of silver in grams that can be plated out of 4.8 Lof an AGNO, solution…

A: Given volume of solution = 4.8 L density of solution = 1.01 g/ml