02/27/22

Calculate the mass percent of chlorine in each compund?
Calculate the mass percent composition of chlorine in each compound.Express you answer in percent to four significant figuresPart A- CI2OPart B- CI2O2Part C- CIO2Part D- CI2O5
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02/27/22

Chemistry Analytical
A standard solution for Fe2+ determination can be prepared from ferrous ammonium sulfate (Fe(NH4)2(SO4)2.6H2O).Calculate the mass of Fe in 136 mg of ferrous ammonium sulfate.Calculate the mass of... more
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02/27/22

Analytical Chemistry - Spectrophomet Det.
You prepare a standard solution of ferrous ammonium sulfate that is 50.0 ppm in Fe. You pipette aliquots of 0.50 mL, 1.00 mL, 2.00 mL, 4.00 mL, 8.00 mL, and 10.00 mL into 100-mL volumetric flasks,... more
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02/27/22

How many moles of potassium oxide (K2O) are in 46.9 g of the compound?
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02/27/22

I have been struggling to learn how to do this. Given 2H2+ Oz--> 2H20 What mass of oxygen is needed to produce 29 moles of water
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02/27/22

Chemistry Buffer Problems
Calc‎ulate the p‎H of a buf‎fer conta‎ining 0.10 M NH‎3 and 0.20 M NH4‎Cl . Kb NH3 = 1.8 x 10-5 A che‎mist ‎needs a bu‎ffer with p‎H 4.‎35. How m‎any millilit‎ers of pu‎re ace‎tic a‎cid (d‎ensity... more
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02/27/22

Ea or k from Arrhenius Plot Information
For the gas phase decomposition of chloroethane,CH3CH2ClC2H4 + HClthe rate constant in s-1 has been determined at several temperatures. When ln k is plotted against the reciprocal of the Kelvin... more
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02/27/22

how much methane or ammonia will be left when the reaction is finished?
If 25 grams of methane, CH 4, and 30 g of ammonia, NH 3, are combined w/ excess oxygen, how much methane or ammonia will be left when the reaction is finished? CH 4 + NH 3 + O 2 ® 2HCN + 6H 2O
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02/27/22

I can't seem to figure out how to solve this?
If 0.200 moles of AgNO₃ react with 0.155 moles of H₂SO₄ according to this UNBALANCED equation below, what is the mass in grams of Ag₂SO₄ that could be formed? AgNO₃(aq) + H₂SO₄ (aq) → Ag₂SO₄ (s) +... more
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02/26/22

How much money, in dollars, does one mole of dimes represent?
Part AHow much money, in dollars, does one mole of dimes represent?Express your answer using four significant figures.Part BIf this amount of money were evenly distributed among the entire world's... more
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02/26/22

How many grams of water can be heated from 20.5oC to 32.8oC by the heat released from 87.3 g of iron that cools from 87.0oC to 28.9oC?
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02/26/22

A 0.204-g sample of CO3
A 0.204-g sample of CO32- antacid is dissolved with 25.0 mL of 0.0981 M HCl. The Hydrochloric acid that is NOT neutralized by the antacid is is titrated to a bromophenol blue endpoint with 5.83 mL... more
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02/25/22

Question in Description
Cryolite, Na3AlF6, an ore used in the production of aluminum, can be synthesized using aluminum oxide. Balance the equation for the synthesis of cryolite.Al2O3 (s) + NaOH (l) + HF (g) = Na3AlF6 +... more
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02/25/22

Combining 0.395 mol Fe2O3 with excess carbon produced 10.7 g Fe. Fe2O3+3C⟶2Fe+3CO. What is the actual yield of iron in moles? What is the theoretical yield and percent yield?
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02/25/22

calculate the oxygen required to covert 63g of glucose to CO2 and H2O
Glucose, C6H12O6 is used as an energy source by the human body. The overall reaction in the body is described by the equationC6H12O6(aq) + 6O2 (g) = 6CO2 (g) + 6H2O (l)Calculate the number of grams... more
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02/25/22

What is the limiting reagent? Calculate the theoretical yield of iron(3)oxide(Fe2O3)? The reaction produces 6.14g of oxide. What’s the percent yield of the reaction? (See Description)
Iron reacts with oxygen at high temperatures to form iron(III) oxide.4 Fe(s) + 3O2(g) = 2 Fe2O3g (s)Suppose 22.8 g of iron (Fe) is reacted with 28.4 g of oxygen (O2)
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02/25/22

A 69.5 g sample of the compound X3 O4 contains 19.2 g of oxygen atoms. What is the molar mass of element X?
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02/25/22

What is the formula for ammonium sulfide? Capitalization and punctuation count. How many hydrogen atoms are in 2.90 mol of ammonium sulfide?
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02/25/22

How many moles of MgS2O3 are in 179 g compound?

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02/25/22

A 9.10 g sample of a compound contains 5.81 g of iron, Fe, 1.07 g of phosphorus, P, and oxygen, O. Calculate the empirical formula for the compound.
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02/25/22

Calculate the theoretical yield and the percent yield of aspirin. (C9H8O4) (more in description)
Aspirin can be synthesized in the lab by combining salicylic acid (C7H6O3) and acetic anhydride (C4H6O3) to form aspirin (C9H8O4) and acetic acid (C2H4O2). The balanced equation for this reaction... more
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02/25/22

The elementary reaction
2H2O(g)↽−−⇀2H2(g)+O2(g)proceeds at a certain temperature until the partial pressures of H2O,H2, and O2 reach 0.0100 atm, 0.00250 atm, and 0.00750 atm, respectively. What is the value of the... more
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02/25/22

At a certain temperature, 0.860 mol SO3 is placed in a 2.50 L container.
2SO3(g)↽−−⇀2SO2(g)+O2(g)At equilibrium, 0.100 mol O2 is present. Calculate 𝐾c.𝐾c=_____
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02/25/22

How many molecules of water, H₂O, are created by 6.56 grams H₂O?

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02/25/22

How do you solve this?
Calculate the volume in liters of a 0.00747 mol/L calcium sulfate solution that contains 150.g of calcium sulfate CaSO4.Round your answer to 3 significant digits.
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