6. You are given a 5.00-gram sample that contains a mixture of only two compounds, manganese(II) chloride and potassium chloride. You dissolve the sample in enough water to make exactly 100.0 mL of solution. To the solution you made, you add an excess of calcium metal. After removing the excess, unreacted calcium, it was found that 0.873 grams of metallic product remains. What is the percent by weight of manganese(II) chloride in the original 5-g sample?

Q: Iodine is prepared both in the laboratory and commercially by adding Cl, (g) to an aqueous solution…

A: The given reaction is : 2NaI(aq) + Cl2(g)→I2(g) +2NaCl(aq) Mass of I2 produced = 23.6 g

Q: Enter your answer in the provided box. One of the reactions that occurs in a blast furnace, in which…

A:

Q: 2. A typical antacid tablet contains 0.50g of calcium carbonate. The chemical equation for the…

A: Mass of Calcium carbonate in tablet = 0.50 g Molar mass of CaCO3 = (Atomic mass of Ca + atomic mass…

Q: Like many metals, aluminum reacts with a halogen to give a metal halide: 2 Al(s) +3 Br2 (4) → Al,Bre…

A: Given- Reaction 2 Al (s)  + 3Br2 (l) ---> Al2Br6 (s) Mass of Al = 9.71 g To find- Mass of Br2…

Q: 10.8 mL of 0.25 M HCl(aq) reacts with an excess of Mg(OH)2(aq), what mass of magnesium chloride…

A:

Q: A student, Ken, is given a mixture containing two nitrate compounds. The mixture includes NaNO3 and…

A: Mixture consists of two nitrate compounds NaNO3 and Ca(NO3)2. Mass Percentage of NO3 in the mixture…

Q: 2.50 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A:

Q: Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs,…

A: The molar mass of Fe is 55.85 g/mol. The molar mass of Al is 26.98 g/mol. The molar mass of Fe2O3 is…

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

A:

Q: Iodine is prepared both in the laboratory and commercially by adding Cl2(g) to an aqueous solution…

A: Number of moles of I2 is determined as follows, Molar mass of NaI is 253.8 g/mol 2 moles of NaI…

Q: Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs,…

A:

Q: This equation models how pure silver (Ag) is extracted from ores of AgK(CN)2 (potassium…

A: Given that, pure silver (Ag) is extracted from ores of AgK(CN)2 (potassium argentocynate). The molar…

Q: The density of water of a lake is 1.25 g mL-1 and one kg of this water contains 92 g of Na+ ions.…

A:

Q: Iodine is prepared both in the laboratory and commercially by adding Cl2(g)Cl2(g) to an aqueous…

A: Number of moles of I2 is determined as follows,

Q: 5.00 g of copper is reacted with 5.00 g of sulfur in a crucible and a compound composed of copper…

A: Mass percentage of substance is one of the ways to express composition of compounds. Mass percentage…

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

A:

Q: Over the years, the thermite has been used for welding railroad rails, in incendiary bombs, and to…

A: Given: Mass of iron = 15.0g To find: The masses of iron(III) oxide, aluminium and maximum mass of…

Q: Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs,…

A: Mass of Fe = 10.1 g  Atomic mass of Fe = 55.845 g/mol  Number of moles of Fe =  10.1 / 55.845  =…

Q: An experiment is designed to determine the mass percent of sulfate in an unknown soluble sulfate…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: experiment was done to determine the composition of a mixture of sodium chloride and sodium…

A:

Q: Enter your answer in the provided box. One of the reactions that occurs in a blast furnace, in which…

A:

Q: A sample of limestone and other soil materials was heated, and the limestone decomposed to give…

A: The solution is given below -

Q: Upon reaction of 1.27 g of copper sulfate with excess zinc metal, 0.376 g copper metal was obtained…

A: Given mass of CuSO4 = 1.27 g  Gram molar mass of CuSO4 = 159.62 g  Experimental yield or actual…

Q: Consider the following compound: Sr3(PO4)2 *4H2O -Calculate the mass, in grams, of Sr present in…

A:

Q: When an identical 4.008 g of sulfur is burned completely in a restricted amount of air, it again…

A: Given,Sulfur is burned completely in a restricted amount of air, it again combines with oxygen to…

Q: A mixture contains only NaCl and Fe(NO3)3 . A 0.456-g sample of the mixture is dissolved in water,…

A:

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

A:

Q: A student prepares aspirin using 17.530 grams of salicylic acid (MW = 138 g/mol) and 5.00 mL of…

A: The balanced reaction is as follows:        C7H6O3    +    C4H6O3     →     C9H8O4      +…

Q: Iodine is prepared both in the laboratory and commercially by adding Cl2(g)to an aqueous solution…

A: When stoichiometric coefficient results in the equal number of atoms of each element on both the…

Q: A supplement was tested for iron content in a laboratory. First, a random sample of 10 tablets…

A: #(a): Given the mass of the iron tablet taken to obtain Fe2O3(s) = 2.7544 g  Mass of pure and dry…

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A:

Q: The balanced chemical equation is P₄(s) + 6 Cl₂(g) → 4 PCl₃(g). What is the mass in grams of…

A:

Q: Iodine is prepared both in the laboratory and commercially by adding Cl2(g)Cl2(g) to an aqueous…

A: Given;

Q: In a reaction involving manganese, Mn and sulfur, S it was determined that 0.549 g of manganese…

A: First we convert the mass sulfur and manganese to Moles. By this moles of Mn & S  , we have to…

Q: a What is the maximum mass of ammonia that can be produced from a mixture of 1.00 x 10 g N2 and 5.60…

A:

Q: A student prepares aspirin using 2.409 grams of salicylic acid (MW = 138 g/mol) and 5.71 mL of…

A:

Q: This equation models how pure silver (Ag) is extracted from ores of AgK(CN)2 (potassium…

A: The balanced chemical equation,  2AgK(CN)2(aq) + Zn(s) → 2Ag(s) + Zn(CN)2(aq) + 2KCN(aq) Given,…

Q: A student, Ken, is given a mixture containing two nitrate compounds. The mixture includes NaNO3 and…

A: Mass Percentage of NO3 in the mixture is 73.76%. it implies that 100 g of mixture contains 73.76 g…

Q: Iodine is prepared both in the laboratory and commercially by adding Cl, (g) to an aqueous solution…

A: From the given reaction,

Q: Aspirin can be prepared from salicylic acid (C7H603), which has a molar mass of 138.12 g/mol, and…

A: First of all we calculate the mass of Acetic anhydride using Following relationship - Density =…

Q: What mass of hydrogen gas was produced?   What mass of zinc reacted?   What was the percentage of…

A:

Q: Iodine is prepared both in the laboratory and commercially by adding Cl2(g)Cl2(g) to an aqueous…

A: The balanced reaction is as follows: Molar mass of NaI = 149.89 g Molar mass of I2 = 253.81 g

Q: In an experiment to determine the empirical formula of magnesium chloride, 0.50 g of magnesium…

A: Given : mass of magnesium ribbon = 0.50 gram. To find : empirical formula of magnesium chloride.…

Q: A supplement was tested for iron content in a laboratory. First, a random sample of 10 tablets…

A: A question based on mole concept that is to be accomplished.

Q: 4) Zinc oxide can be produced by the following reaction: 2 Zn (s) + O2 (g) 2 ZnO (s) - There are…

A: Given-> Surface area = 5500 cm2 For 1 cm2 surface required atom of Zn = 1.9 × 1020

Q: 6.778 X 102 vanadium (V) ions react with 15.001 grams of magnesium metal producing vanadium metal…

A:

Q: A mixture contains only NaCl and Fe(NO3)3. A 0.456-g sample of the mixture is dissolved in water,…

A: Given a mixture has NaCl+Fe(NO3)3. When excess NaOH is added, Fe(NO3)3 reacts with NaOH and forms…

Q: Zinc and sodium metal each react with sulfuric acid according to the following equations. Zn(s) + H,…

A:

Q: A student prepares aspirin using 2.365 grams of salicylic acid (MW = 138 g/mol) and 5.89 mL of…

A:

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.