galena a mineral of lead is a compound of the metal with sulfer. Analysis shows that a 17.74 g sample of galena contains 2.39 g of sulfer a.) Calculate Mass of lead b.)Mass Fractions of lead and sulfer in galena. Calculate to three significant figures mass fraction of Pb: Mass fraction of S: c.) Mass percents of lead and sulfer in galena. Calculate to three significant figures  Mass % of Pb: Mass % of S:

Q: A student is given a 1.8686 g of an unknown copper compound. Following isolation by displacement by…

A: Given: Mass of Cu = 0.3685 g Mass of compound = 1.8686 g

Q: A 7.83-g geological sample, containing the mineral Boulangerite (Pb5Sb4S11) as the only lead-bearing…

A: Mass percentage or percentage by mass : It is the mass of one component(in the substance) in grams…

Q: A sample of ultrapure silicon was reacted with excess oxidizing yielding SiO₂. After proper…

A: Given that -  Mass of Silicon dioxide SiO2 =  3.1754 g  Percentage of ultrapure silicon = 99.98%…

Q: A sample of salt water was collected weighing 112.09 grams.  After boiling for several minutes until…

A:

Q: 2.Iron ore is impure Fe2O3. When Fe2O3 is heated with an excess of carbon (coke), metallic iron and…

A: Weight of sample = 938kg = 938000g Pure iron in sample = 523kg Assuming that impurities donot…

Q: A 5.276 g sample of Al-Mg alloy is digested in nitric acid (to Al*3 and Mg*²). The solution is…

A: Given: Mass of sample = 5.276 g The solution is diluted = 500 mL three 100 mL of solution titrated…

Q: Barium metel was quantitatively precipitaded from 1.52g sample of BaCl2+2H2O. The mass of the barium…

A: Mass percentage = (mass of solute / mass of solution) x 100%

Q: An element consists of 1.40% of an isotope with mass 203.973 u, 24.10% of an isotope with mass…

A:

Q: Barium metal was quantitatively precipitated from a 1.52 g sample of BaCl2-2H2O. The mass of the…

A: Given: Mass of the sample BaCl2.2H2O =1.52g Mass of Barium collected = 0.844g

Q: A sample of manganese weighing 3.245 g is dissolved in 2.00 M HCl....   A) When an excess of Na2S…

A: Given, A sample of manganese weighing 3.245 g is dissolved in 2.00 M HCl....   A) When an excess of…

Q: 1. A solution was prepared by dissolving 1210 mg of K3Fe(CN)6 (MM=329.2 g/mol) in sufficient water…

A:

Q: The zinc in a 1.199 g sample of a foot powder was precipitated as ZNNH,PO4. Strong heating of the…

A: Given :  Mass of foot powder = 1.199 g  Mass of Zn2P2O7 produced = 0.4089 g

Q: impurity, for example, when 2 g is dissolved in water and oxidized, then precipitated Fe (OH)3 is…

A:

Q: Chromium metal is obtained by heating chromium(III) oxide with carbon. Calculate the mass percent of…

A:

Q: A student is given a 1.3002 g of an unknown copper compound. Following isolation by displacement by…

A:

Q: A 12.00 g sample of MgCl, was dissolved in water. 0.2500 mol of AgNO3 was required to precipitate…

A: Magnesium chloride reacts with silver nitrate to form a precipitate of silver chloride and a…

Q: An element consists of 4.35% of an isotope with mass 49.946 u, 83.79% of an isotope with mass…

A: Average atomic mass: The average atomic mass of an element is the sum of the masses of its isotopes,…

Q: A mixture of CaCO₃ and CaO weighing 0.693 g was heated to produce gaseous CO₂. After heating, the…

A: Molecular mass The molecular mass is the mass of a given molecule. It is measured in Daltons. The…

Q: (2) An ore is analyzed for the manganese content by converting the manganese to Mn,0, and weighing…

A: Mass of total sample = 1.52g mass of Mn2O3 = 0.126g mass % of Mn2O3 =( mass of Mn2O3/total mass of…

Q: A sample of soda-lime glass for tableware is analyzed and found to contain the following percentages…

A: Given- % by mass of oxides SiO2 = 72.4% Na2O =18.1% CaO = 8.1% Al2O3 =1.0% MgO = 0.2% BaO = 0.2%…

Q: 4. A student completely dissolved 0.51 g of copper in concentrated nitric acid. After a series of…

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Q: A 1.500-g sample of a mixture containing only Cu2O and CuO was treated with hydrogen to produce…

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Q: The most common minerals found in soils are combinations of which four elements, which are also the…

A: A question about elements that is to be accomplished.

Q: 4. a) A given inorganic compound contains only silicon (Si) and hydrogen (H). If the mass percentage…

A: An inorganic compound contain only silicon (Si) and hydrogen (H),a) given, mass percentage of Si =…

Q: B) Find the normality of a solution that can be made by dissolving 2.8 g. of CaCl, in 250 ml of…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: 4. An impure sample of magnesium chloride has a mass of 50 g. After perfect purification, 45 g of…

A: Given  Mass of impure magnisium chloride = 50g  Mass of pure magnisium chloride = 45 g  Mass of…

Q: A student is given a 1.3308 g of an unknown copper compound. Following isolation by displacement by…

A: Given,      Mass of the unknown Copper Compound =1.3308 g      Mass of Copper (Cu) Metal recovered…

Q: The drawing below shows a mixture of molecules: key carbon hydrogen nitrogen sulfur охудen chlorine…

A: This question is based on the general chemistry. The balanced chemical reaction is, 2C2H2 + 5O2…

Q: A 0.8780 g sample containing only NaCl and KCl was treated with AgNO3. The AgCl formed had a mass of…

A: Given that -  Mass of sample containing NaCl and KCl = 0.8780 g  Mass of AgCl = 1.913 g  Also atomic…

Q: First N2(g) + 3H2(g)—2NH3(g) second NH3(g) + 2O2(g)—HNO3(g) + H2O(g). Write the net chemical…

A: Question is based on the concept of chemical reaction. we need to write net chemical reaction taking…

Q: A 290.3-g sample of ground water is analyzed for calcium. The Ca2+ in the sample is first…

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Q: EX- An ore is analyzed for the manganese content by convening the manganese to Mn304 and weighing…

A: Information of question

Q: ure Fe2O3.  When solid Fe2O3 is heated with an excess of carbon, iron metal, and carbon monoxide are…

A: When Fe2O3 reacts with carbon, pure iron is obtained. The following reaction takes…

Q: Use the References to access important values if needed for this question. Mn, S O, n H20 is the…

A:

Q: 5. An impure sample of magnesium chloride has a mass of 50 g. After perfect purification, 45 g of…

A: In the given question we have to calculate the percent purity of the original sample.

Q: An engineer has filed for a patent for a brand new allot to be used in golf club heads. The…

A:

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.