What is the answer to the following problem, reported to the correct number of significant figures? (8.000−7.009) / (10.00∗0.010000) A. 9.910 B. 9.91 C. 9.9 D. 0.9910 E. 0.99   B) Hydrates take the form: compound·nH2O. An unknown hydrate has a molar mass of 537 g/mol.If the anhydrate has a molar mass of 375. g/mol, what is the integer n in the hydrate. A. 5 B. 6 C. 7 D. 8 E. 97.   C) Calculate the change in enthalpy for the following reaction: A + 3B→D ∆Hrxn=? Given: 3A + 12B→6C ∆Hrxn= 60.0 kJ 2B + 2D→4C ∆Hrxn= 60.0 kJ Express your answer in kJ. A. -20.0 kJ B. -10.0 kJ C. 0.0 kJ D. 10.0 kJ E. 20.0 kJ

Q: by your instructor. Calculations 4. Calculate the mass of the hydrate (2 - 1) 5 Calculate the mass…

A:

Q: Answer the following que 1. What is this Fe₂O3(s) + 3CO(g) the reactants or products? 2. What is the…

A:

Q: Calculate the number of grams of NH3 produced by the reaction of 6.82 grams of nitrogen with…

A:

Q: Metallic magnesium burns with nitrogen gas according to the following balanced equation: 3 Mg (s)  +…

A: The question is based on the concept of Reaction Stoichiometry.   We know limiting reagent and…

Q: According to the following reaction, AL4C3 + 12H20 → 4AL(OH)3 + 3ch4, What is the number of grams of…

A: Consider the balanced equation as;                                 AL4C3       +        12 H2O…

Q: For the following reaction, 19.1 grams of nitrogen monoxide are allowed to react with 5.30 grams of…

A: Give reaction: 2 NO (g) + 2 H2 (g) → N2 (g) + 2 H2O (l)  2 mol        2 mol        1 mol       2 mol…

Q: Be sure to answer all parts. What is the mass in grams of 5.82 x 109 molecules of the pain reliever…

A: Given molecules of ibuprofen = 5.82 × 1019  Molar mass of ibuprofen = 206.3 g/mol

Q: 3 NO2(g)  +  H2O(l)  -->  2 HNO3(aq)  +  NO(g) Calculate the moles of nitric acid produced when…

A:

Q: The reaction shown is used to produce electricity in a hydrogen fuel cell. Suppose a fuel cell…

A: The objective of this question is to determine the amount of water that can be produced from a given…

Q: If 58.0 g of Fe₂O3 was allowed to react with excess Al based on the balanced reaction given below,…

A: Answer:In this problem we have to convert the mass of Fe2O3 into mass of Fe by using the…

Q: oluene (MW 92.141, d 0.87) is a chemical solvent. How many moles of toluene are present in 87.9 mL…

A: Given   volume of Toluene = 87.9 mL               density   = 0.87 gram/ mL   Number of mole of…

Q: . Household sugar, sucrose, has the molecular formula C12H22011. What is the %, by mass, of carbon…

A:

Q: PROVIDE THE CORRECT SHORT ANSWER IN THE BOX FOR THE DESCRIPTION BELOW - How many atoms or molecules…

A: The question is asking for the number of atoms or molecules in one mole of a substance. This is a…

Q: 6.11 × 1020 SOg molecules Express your answer in grams to three significant figures. m(SO3) = 15.…

A:

Q: Magnesium, Mg, reacts with sulfuric acid, H2SO4, according to the following chemical reaction. How…

A: A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or…

Q: Given the following mixture of two compounds 60.00 g of X (MW =63.00 g/mol)(density 1.047 g/mL) and…

A: Mass of X = 60 gm Volume of Y = 680 ml

Q: What is the mass percentage of O in C,H,O,? 42.051 % C 8. 9. +/- x 100 3. 2. 4. 7,

A: Given: C3H8O2

Q: A student weighs 1.00 grams of CuSO, on a balance. After heating, the compound weighed 0.638 grams.…

A: SOLUTION: Step 1: The formula of Copper sulfate hydrate is CuSO4.5H2O. Mass of water = Mass of…

Q: Given the following mixture of two compounds 35.00 mL of X (MW =70.00 g/mol)(density 1.156 g/mL) and…

A: Given : volume of X = 35 mL and density of X = 1.156 g/mol Hence mass of X = density * volume =…

Q: Acetylsalicylic acid, which is C9H8O4, is more commonly known as the active ingredient in Aspirin.…

A: Molar mass- The mass of one mole of a substance in grams is called molar mass. The numerical value…

Q: How many grams of carbon dioxide form? Express your answer in grams to three significant figures.…

A: Limiting reactant :- The reactant which is present in lesser number of moles than required as per…

Q: 2. Explosives are effective if they produce a large number of gaseous molecules as products.…

A:

Q: Given the following mixture of two compounds 65.00 g of X (MW =69.00 g/mol)(density 0.830 g/mL) and…

A: Mass percentage of any substance is expressed as the mass of the substance divided by the total mass…

Q: How many grams of water are represented in 800 g of MgSO4*7H2O? MW of MgSO4*7H2O = 246 g/mole MW of…

A:

Q: Hydrates have the general formula: CxAy•z H₂O where z designates the number of water molecules in…

A: Hydrates have the general formula:CxAy.zH₂Owhere z designates the number of water molecules in one…

Q: Calcium hydride, CaH2, reacts with water to form hydrogen gas:  CaH2(g) + 2 H2O(l) ---> Ca(OH)2(aq)…

A: Stoichiometry, in balanced chemical reaction is defined by the ratio at which reactants are reacting…

Q: Conversion Math. 1. What is the mass of 4.34 x 1027 hydrogen molecules? (2 steps) 2. How many…

A: 1mole= molar mass= 6.022*10^23 molecules/formula unit

Q: Glucose, C_(6)H_(12)O_(6), is used as an energy source by the human body. The overall reaction in…

A: The given mass of glucose = 63.0 g

Q: C,H16 () →7 CO2 (g + 8 H2O (g) + 11 O2 (g) + 8 H2O (e) If 0.0035 mol of O2 reacts, how many mol of…

A: Mole of a substance or a mole of a particles is defined as exactly 6×10^23 particles which may be…

Q: Calculate the mass, in grams, of 322 atoms of iron, Fe (1 mol of Fe has a mass of 55.85 g).

A:

Q: 39. Convert 2.001x102 formula units of Ba3(PO4)2 to mass, in grams, of Ba3(PO4)2. Mass of Ba3(P04)2:

A: Avogadro's number equals to the moles of that substance which can be used to find its mass if its…

Q: Calculate the maximum mass (g) of urea that can be formed if 637.2 g of ammonia is reacted with 1142…

A:

Q: The most common constituent of gasoline is iso-octane. It is a hydrcarbon, composed of 84.12percent…

A: Given % C = 84.12  % H = 15.88 Molecules per gram =5.27× 1023 molecules

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.