2. If 428 grams of Cu is combined with sulfur to make 628 grams of CuS, what is the percent yield of CuS? Cu S8 CuS

Q: Fe(s) + O2(g)  Fe2O3(s) If 1.05 g of iron is heated and placed in a bottle containing 0.0219 mol of…

A:

Q: When copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given experiment,…

A: When Cu(s) is heated with excess S8 then Cu2S is formed.  16Cu(s) + S8 = 8Cu2S  Molecular weight of…

Q: Fe(s) + O2(g)  Fe2O3(s) If 1.05 g of iron is heated and placed in a bottle containing 0.0219 mol of…

A: To calculate the mass of iron (III) oxide produced we would proceed as :  First write the balanced…

Q: Consider the following unbalanced chemical equation. LIOH(s) + CO,(g) –Li,CO3(s) + H,O() If 83.6…

A: Un balanced chemical equation, LiOH (s) + CO2 (g) → Li2CO3 (s) + H2O (l) Balanced chemical equation,…

Q: The cycle of copper reactions starts with solid copper metal and ends with solid copper metal.…

A:

Q: In a certain reaction, Fe and O2 combine to form iron(III) oxide. 20.4 moles of Fe and 14.5 moles of…

A: The chemical reaction between iron and Oxygen takes place as given below in balanced form. 4Fe + 3O2…

Q: Pp

A: Given:Mass of the  mixture is  5.10 g.Mass of fluorine in mixture is 3.22 g.Molar mass of lithium…

Q: 6.0 g of C mixed with 2.1g of H2 how many grams of CH4 is produced,

A: The coefficients present with the engaged reactant molecule and also product molecule are stated as…

Q: Penny and Benedict used 0.510 g of Cu(s) in the intial reaction of the Copper cycle experiment. At…

A: Percent yield = (actual yield/theoretical yield) × 100%

Q: Plumbous pernitrate decomposes to lead (II) oxide, nitrogen dioxide, and oxygen gas. How much of the…

A: Given mass of oxygen is  84.3 g

Q: Suppose 8.37 g of zinc was allowed to react with hydrochloric acid to produce zinc chloride and…

A:

Q: How many moles of HF are in 60 grams of HF this

A:

Q: The mineral chalcocite, Cu2S, has been mined for centuries and is one of the most profitable copper…

A: Answer: This question is based on stochiometric calculation where moles of copper needs to be…

Q: 5. A certain substance contains carbon, hydrogen and oxygen only. A 0.1005-g sample of this compound…

A:

Q: When copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given experiment,…

A: The balanced chemical equation can be written as: According to the balanced chemical equation,  2…

Q: Consider the following balanced chemical equation: 3H2 + N2 → 2NH3 If 7.05 grams of H2 were mixed…

A: Given balanced equation: 3H2 + N2 → 2NH3 We have to find how many grams of NH3 would form if 7.05…

Q: In N2O , 28 g N combines with 16  g O. Determine grams of O and N in NO2

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as…

Q: A student decided to prepare Fe2S3 by reacting FeCl3 with H2S.  The other product was HCl. The…

A:

Q: d. If the chemical reaction uses 56.2 grams of MgCl2, then how many moles of Mg metal will be…

A:

Q: 2. What would be the limiting reactant of sodium reacted with 10 mol of chlorine to form 10 mol of…

A: Sodium reacts with chlorine to form sodium chloride. The equation for the balanced chemical reaction…

Q: Consider the following balanced chemical equation: 2Al(s) + 3Cl2(g) → 2AlCl3(s) Determine the mass…

A: Given, mass of Al = 59.6 g=> moles of Al = mass of Al / molar mass of Al = 59.6 g / 26.98 g/mol =…

Q: When heated, KClO3KClO3 decomposes into KClKCl and O2.O2.   2KClO3⟶2KCl+3O22KClO3⟶2KCl+3O2   If…

A: The balanced equation is 2KClO3⟶2KCl+3O2 When 2 mole of KClO3 decomposes , 2 moles of KCl and 3…

Q: A 4.90g sample of barium bromide is reacted with 11.7g of silver (i) nitrate to form silver (i)…

A: The balanced chemical equation for the given reaction is shown below.

Q: NH3+Na=NaNH2 + H2 assuming that you start with 44.5 g of ammonia gas and 17.5 g of sodium metal and…

A:

Q: The cycle of copper reactions starts with solid copper metal and ends with solid copper metal.…

A: This is a cycle of reactions, because you start and end with the same substance, copper metal.

Q: When heated, KCIO3 decomposes into KCl and O₂. 2 KClO3 → 2 KCl + 302 If this reaction produced 34.9…

A:

Q: If 60.2 grams of Hg combines completely with 24 grams of Br to form a compound, what is the %…

A: Given: Mass of mercury (Hg)=60.2 g Mass of Bromine (Br)=24 g The total mass of compound =(60.2 +24)…

Q: 50.2 grams of nitrogen monoxide are combined with 13.0 grams of hydrogen to form ammonia (NH3) and…

A:

Q: A particular chemical reaction that produces benzene has a percent yield of 35.5% If you want to…

A: Given: % yield= 35.5% Actual yield= 45.6 grams Theoretical yield = ?

Q: An experiment has a percent yield of 91.8% and the theoretical yield was calculated to be 28.2 g.…

A: Percent yield is the ratio of actual yield to the theoretical yield, multiplied by 100.

Q: A 4.0 g sample of bromine is reacted with 0.50 grams of hydrogen to form hydrogen bromide. How many…

A:

Q: 7. Nitrogen gas is produced in an automobile air bag. It is generated by the decomposition of sodium…

A: Reaction is given  2NaN3 (s) -----> 3N2 (g) + 2Na(s) since 2 moles of NaN3 Is required to produce…

Q: The reaction of methane and water is one way to prepare hydrogen for use as a fuel:   If you begin…

A: Explanation Stoichiometric equation of methane and water     CH4(g) +H2O(g) → CO(g)  +H2(g) So we…

Q: When heated, KClO3KClO3 decomposes into KClKCl and O2.O2.   2KClO3⟶2KCl+3O22KClO3⟶2KCl+3O2   If…

A: 2KClO3  ----> 2 KCl + 3 O2  Mass of KCl = 35.9 g  Mass of O2 = ?

Q: Solid potassium chlorate, KClO4, decomposes to form solid potassium chloride, KCl, and oxygen gas.…

A: The balanced chemical reaction is the one which has same number of all the atoms in both side of the…

Q: When heated, KClO3KClO3 decomposes into KClKCl and O2.O2. 2KClO3⟶2KCl+3O22KClO3⟶2KCl+3O2 If this…

A: The number of moles for a given compound or a molecule refers to the ratio of its mass to the…

Q: When heated sufficiently, lead (IV) oxide undergoes a decomposition reaction to form lead (II) oxide…

A: The mass of PbO2 before it heated was: 3.74 gExplanation:

Q: 35.0 grams of H2S were reacted with 115.0 g of O2 to produce S02 and H20. The theoretical yield of…

A: Chemical equation is the equation in which the chemical reaction is represented. All the reactant…

Q: How many grams of hydrogen, H2, are produced from 29.3 g of aluminum, Al?

A: Given Synthesis of H2 from Al

Q: Consider the following balanced chemical reaction: N2 (g) + 3 H2 (g) → 2 NH3 (g) What is the…

A: Given: Mass of N2 = 9.36 g Mass of H2 = 4.92 g Known: Molar mass of N2 = 28 g/mol Molar mass of H2 =…

Q: 3 Mg   +   2 AlCl3   →   3 MgCl2   +   2 Al When this reaction was performed in the lab, 2.8 g of…

A:

Q: What percentage of the copper did you recover?

A: Given :-  Initial amount of Cu = 0.492 g  Recovered amount of Cu = 0.464 g   To calculate :-…

Q: Melissa is attempting to synthesize some potassium ferrioxalate and calculates that her theoretical…

A: Given that, Theoretical yield = 9.65 g Experimental yield = 7.89 g

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.