In an experiment, 34.8243g of copper (II) nitrate hydrate, Cu(NO3)2•zH2O was heated to a constant mass of 27.0351g. What is the value of z (the number of waters in the formula)?

Q: Solid copper(II) chloride forms a hydrate of formula CuCl2 ⋅ xH2O. A student heated a sample of…

A: Here we are required to find the percentage of anhydrous copper chloride

Q: Fermentation is a complex chemical process of wine making in which glucose is converted into ethanol…

A: the given reaction., C6H12O6 -----> 2C2H5OH + 2CO2 Molar mass of glucose = 180 g/mol Given Mass…

Q: Given a raw material of 3 kg sodium borate, 1.5 kg hydrochloric acid, and its actual yield of 1.5 kg…

A: The reaction considered is, Na2B4O7 + 2 HCl + 5H2O→4H3BO3 + 2 NaCl

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: When 6.65 g of the hydrate NiSO4 • xH2O was heated in a vacuum, the water was driven off and 3.67 g…

A: NiSO4 . xH2O is a hydrated form of nickel Sulphate and the water involved is called water of…

Q: Barium chloride dihydrate has the formula BaCl2  ·  2H2O. Assume there is another hydrate (BaCl2…

A:

Q: Find the percentage of nitric acid if you know that 9.777 G has been diluted with water to a liter…

A: Givennormality of NaOH solution=.104 Nvolume of NaOH=25 mLvolume of HNO3 used in neutralizatio…

Q: 5. A 2.000 g sample of CoCl2·xH2O is dried in an oven. When the anhydrous salt is removed from the…

A: By calculating moles of CoCl2 and H2O we can find value of x.

Q: Phosphorus may be determined analytically by precipitating it as MgNH4PO4 followed by ignition to…

A: Given data: Mass of sample of phosphate rock = 9.346 gms It contains 71.24% of Ca3(PO4)2 So, mass of…

Q: Cryolite, Na3AlF6(s), an ore used in the production of aluminum, can be synthesized using aluminum…

A: Given information: Mass of Al2O3 = 12.4 kg Mass of NaOH = 57.4 kg Mass of HF = 57.4 kg

Q: Find the percentage of nitric acid if you know that 9.777 G has been diluted with water to a liter…

A: Given Data: Total Mass of HNO3 sample = 9.777 g Volume of HNO3 sample = 1.0 L Volume of HNO3 used…

Q: In an experiment, 34.8243g of copper (II) nitrate hydrate, Cu(NO3)2•zH2O was heated to a constant…

A: Given, mass of copper (II) nitrate hydrate is 34.8243g and when heated the mass is 27.0351g.

Q: 113.4 g of H,S reacts with 247.8 g of SO, according to this reaction. 2H,S + SO, 35 + 2H,0 What mass…

A:

Q: a) Calculate the molar ratio of carbon / hydrogen in the fuel and use the result to prove that the…

A: (A) -- When methane (natural gas) is burnt  CH4+2O2  →  CO2 +  2H2O16 gm              44 gm    36 gm…

Q: Bacterial digestion is an economical method of sewage treatment. The reaction is an intermediate…

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

A:

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

A: Fe2O3 + 2Al.....> 2Fe + Al2O3 Mass of Fe = 14.4 g Molar mass of Fe = 55.8  Moles of Fe =…

Q: Caffeine, a natural stimulant commonly found in tea and coffee, reacts with water according to the…

A: We have given the formula of caffeine as C8H10N4O2 And asked for 1) Molar mass of caffeine 2)…

Q: A 20.0-gram sample of impure NaClO3 produces 4.72 L of oxygen (STP). What is the percentage purity…

A: Percentage purity can be calculated by back calculation of the amount of O2 should be produced.

Q: Explain the attachment

A: Given, Mass of Mg(OH)2 = 5.97g

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

A: The mass of the sample of limestone is = 2.631 g The mass of carbon dioxide gas produced by the…

Q: Complete and balance the molecular equation for the reaction of aqueous copper(II) chloride, CuCl2,…

A: We have to predict the balanced molecular equation.

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: like many metals , aluminum reacts with a halogen to give a metal halide 2 Al(s) + 3 Br2(l) =…

A: 2Als      +       3Br2 l →…

Q: What is the mass, in grams, of 4.06 1023 molecules of aspirin, C9H8O4?

A: Number of molecules of aspirin = 4.06 × 1023 One mole contains Avogadro’s number of atoms.…

Q: What is the formula (solve for x) for the original hydrated sample of copper (II) sulphate? You…

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Q: When 25 g of lead (II) nitrate, Pb(NO3)2, is mixed with 15 g of sodium iodide in water, a reaction…

A:

Q: If you place 7.05 g of aluminum in a beaker with 185 mL of 1.35 M KOH, what mass of KAl(OH)4 is…

A: If 7.05 g of aluminum in a beaker is treated with 185 mL of 1.35 M KOH, the mass of KAl(OH)4 that is…

Q: percentage of mass of Cl in the sulfate salt [Ni(H2O)4Cl2+]?

A:

Q: calculate the mass of calcium phosphate (in kilograms)

A: Since you have posted multiple questions, we are entitled to answer the first only. Please repost…

Q: The elements of Group 1-B (Cu, Ag, and Au) are sometimes referred to as the “coinage  metals.” Why?…

A: Elements Copper ( Cu),  Silver ( Ag) and Gold (Au) are called as 'coinage metals' because as they…

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

A:

Q: Phosgene, a substance used in poisonous gas warfare during World War I, is so named because it was…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: Hydrogen cyanide, HCN, is prepared from ammonia, air, and natural gas (CH4) by the following…

A: The balanced reaction taking place is given as, => 2 NH3 (g) + 3 O2 (g) + 2 CH4 (g)…

Q: What is the mass percentage of O in C₃H₈O₂? Provide an answer to two decimal places.

A: We have to find the mass % of O in C₃H₈O₂ As,  Atomic mass of C = 12 g mol-1 Atomic mass of H = 1 g…

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 2.365 grams of salicylic acid (MW = 138 g/mol) and 5.89 mL of…

A:

Q: Aspirin can be prepared from salicylic acid (C7H;O3), which has a molar mass of 138.12 g/mol, and…

A:

Q: Part B How many moles of hydrogen gas would be needed to react with excess carbon dioxide to produce…

A: Balanced equation: CO2 (g)  +  4H2 (g)  -----> CH4 (g) + 2H2O (g) Number of mol of methane =…

Q: The compound As2I4 is synthesized by reaction of arsenic metal with arsenic triiodide. If a solid…

A: We have to predict the mass of As2I4 that can be prepared and the mass that is actually isolated.

Q: 11. The compound As214 is synthesized by reaction of arsenic metal with arsenic triiodide. If a…

A: The reaction between As metal and AsI3 can be shown as: As+AsI3→As2I4 This is an imbalance chemical…

Q: C3H8 + 5O2    --> 3CO2 + 4H2O                                                         How many…

A: To calculate grams of oxygen required, we would use dimensional analysis method .  For this we would…

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.