A sample of phosphorus weighing 2.50 grams is burned in the presence of oxygen. What is the empirical formula of the phosphorus oxide compound if the product has a mass of 5.73 grams? What is the actual molecular formula or the compound if the molar mass is determined to be 285 g/mol. Show all work.

Q: Determination of the amount of water, mass of crucible  + dehydrated  sample 16.2265g, mass of…

A: Given:- amount of water + mass of crucible  + dehydrated  sample = 16.2265g mass of dehydrated…

Q: benefit, producing more heat and light energy by mass than other hydrocarbon, or fossil fuel,…

A:

Q: Calculate the number of grams of salicylic acid needed to produce 125 g of aspirin, assuming the…

A: The preparation of Aspirin is given as

Q: a hydrated CuSO4 salt was heated and thus dehydrated. Determine the % H2O by weight in the hydrated…

A: The number of moles is a ratio of the mass of a substance to the molar mass of the substance.…

Q: The guest list included 175 people who were invited, but 106 people showed up. Wh is the percent…

A: The percentage yield here will be defined by the. Formula = (number of people showed up/ no of…

Q: How many moles of Cu (Copper) are in 1.48 x 1025 Cu atoms? Show the work.

A: Given, 1.48 x 1025 Cu atoms

Q: REQUIRES WORK. What is the percent composition of oxygen in serine? 45 70% 34.30% 13 30% 6.71% A…

A: Mass percent of a substance is given by, Mass percent = (Mass of substance)(100)Total mass

Q: Suppose 1.1780g CuCl2 and 2.2773g of Na3PO4 were reacted as in this experiment. What is the…

A: The limiting reagent in a chemical reaction is a reactant that is totally consumed when the chemical…

Q: Convert 6 moles of Na to mg. Show work

A: Mole is the ratio of given weight by molar mass. n=Given weightMolar mass

Q: For this short answer question, please be sure to show all work and use units.  What is the…

A: The mole of solute is = 5 mol The volume of the solution is = 31 L The molarity of the solution is…

Q: Show all your work and include appropriate units. Q1. Calculate moles of NaC2H3O2 (s), then use…

A:

Q: For 4130 steel, how many atoms per carbon atom are there? Please show work.

A: For 4130 steel, the amount of iron atoms present are alomst 98%. There is maximum percentage of iron…

Q: Mass of sample (g ) 1.94g Mass of empty crucible (g)  84.248g Crucible and sample after heating…

A: Mass of sample = 1.94 g Mass of empty crucible (g) = 84.248 g Crucible and sample after heating (g)…

Q: The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O:…

A:

Q: In the following reaction, C5H12(1) + 8 02 (g) – 6 H20 (g) + 5 CO2 (g), how many moles of water…

A: C5H12 (l) + 8 O2 (g) -------> 6 H2O (g) + 5 CO2 (g) According to Stoichiometry of reaction; 8…

Q: After heating 2.000 g of MgSO4.7H2O to constant mass, the remaining residue in the crucible weighs…

A: Mass of salt before heating = a = 2 gm Mass of salt after heating = b = 0.978 gm Mass of water =…

Q: A local water retention pond was found to have elevated mass concentration of mercury of 14 ng per…

A: Given data: Concentration of mercury = 14 ng/L Volume of water in swimming pool = 1250 m3   Known…

Q: Hydrogen will combust in the presence of oxygen gas in an explosive fashion, producing the harmless…

A:

Q: Photosynthesis is a process that incorporates carbon dioxide and water and yields food in the form…

A: The chemical reaction involved in photosynthesis-6CO2 + 6H2O→Sunlightchlorophyll C6H12O6 + 6O2 A…

Q: 1. Formula of anhydrous salt ........ ........ 2. Mass of empty dry crucible and lid 19.219.8 3.…

A: 6) Mass of hydrate = Mass of crucible,lid and hydrate before heating(3) - Mass of empty dry crucible…

Q: A 2.52-g sample of a compound containing only carbon, hydrogen, nitrogen, oxygen, and sulfur is…

A:

Q: C2H5OH(l) + 3 O2(g) ⟶ 2 CO2(g) + 3 H2O(g) ΔH∘ = −1270 kJ/molrxn Ethanol, C2H5OH, will combust in air…

A: Applying concept of limiting reagent and basic formula.

Q: Given these reactions, where X represents a generic metal or metalloid 1)…

A: Given equations are : H2 (g) + ½ O2 (g) ⟶ H2O (g)        ΔH1 = −241.8 kJ ………(1) X (s) + 2 Cl2 (g) ⟶…

Q: Balance these chemical equations. (Use the lowest possible whole number coefficients.) (a)  HgO →…

A: Applying hit-trial method of balancing chemical reaction by balancing atoms both side of arrow.

Q: Calculate the number of molecules or formula units in each of the following amounts: 0.989 mol of…

A: One mole = 6.023×1023 no of molecules.

Q: A 0.400-g sample of Niobium(IV) oxide is reacted with oxygen gas, yielding 0.4256 g of a new…

A: A reaction in which the number of atoms which are there in the reactant side and the product side is…

Q: (h) HCN + O2- N2 + CO2 + H20 (i) B5H9 + O2- B2O3 + H20

A:

Q: a laccd sign in - Sear X tab caps lock shift 1 A chemist determines by measurements that 0.080 moles…

A: Given,  The moles of Iodine solid precipitates in the chemical reaction = 0.080 mole.  The mass of…

Q: Your lab partner accidentally mixed some sodium chloride with your sample of Epsom salts…

A: Given data: Mass of hydrated salt = 100 gmMass of Anhydrous salt = 55.25 gmThe molar mass of water =…

Q: Combustion of hydrocarbons such as butane (C H10) produces carbon dioxide, a "greenhouse gas."…

A: Balanced equation for combustion of C4H10 = to be determined Mass of butane undergo Combustion =…

Q: On your own paper.....Perform the following calculations showing all work. Be sure to include the…

A:

Q: Calculate the ΔG°rxn using the following information.                                Mg(s)   +…

A: Given: Mg(s)   +   N2O(g)   →    MgO(s) + N2(g) ΔG°f (N2O) =103.7  kJ/mol ΔG°f (MgO) =−569.3 kJ/mol

Q: Ca An important reaction that takes place in a blast furnace during the production of iron is the…

A:

Q: determined. Use the following data to perform this calculation for copper (II) sulfate. Mass of…

A: Note - Since you have asked multiple questions, we will solve the first question for you. If you…

Q: The ratio by mass of carbon to hydrogen in 100 g of a certain compound is 6 to 1. What will be the…

A: Given information: Mass of a certain compound = 100 g Ratio of mass of carbon to hydrogen = 6 : 1…

Q: 3. C9H18 + 02 Co2 + H20 Find the difference between the coefficients of the reactants. O A. 15 О в.…

A: Given reaction,      C9H18 + O2 → CO2 + H2O

Q: What is the mass (in grams) of 0.0985 moles of nitric acid (HNO3)? Select one: a. 2.10 x 10-3 g b.…

A:

Q: Choose the coefficients that balance the following reaction: C3H5(NO3)3 → _ CO2 + N2 + H20 + O2 O…

A:

Q: Seoyeon needs to determine the formula of an unknown hydrate (AB-XH2O). Given the following data:…

A: Given: Hydrated salt AB.xH2O

Q: One method used in the production of H2 gas is to put the coal into an incomplete combustion…

A: A balanced reaction has equal number of atoms of each elements on either side of the reaction. The…

Q: Your lab partner accidentally mixed some sodium chloride with your sample of Epsom salts…

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

Q: Determine the empirical and molecular formula for chrysotile asbestos. Chrysotile has the following…

A: A molecular formula of a compound  represents the number of atoms of each element present in that…

Q: In the following balanced chemical reaction, what is the value of b (use only real number)? aCsH;OH…

A: The chemical reaction follows the law of conservation of mass. According to the law of conservation…

Q: Ten replicate analyses of the concentration of mercury in a sample of commercial gas condensate gave…

A: Answer

Q: Edible ethanol, for use in the pharmaceutical industry, is still made by the fermentation of sugars.…

A: In the given question, four subparts are there from the topic of fermentation of sucrose and their…

Q: How many grams of NH3 will be required to react with 32.7 grams of pbo based on the balanced…

A:

Q: Balance the following chemical equations (type corresponding coefficients (1, 2, 3, ...) in blanks).…

A: BALANCED  REACTION 2 NO2 + F2 ---> 2 NO2 F

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: Convert a mass of 146 g of sodium nitrate, NaNO3 into moles.  Hint: use Molar mass as a conversion…

A: Given,  Mass of sodium nitrate, NaNO3 = 146 g  Molar mass of NaNO3 = 23+14+(16x3)…

Q: Balance the equations by inserting coefficients as needed. H_{2}S + LiOH -> Li_{2}S + H_{2}O…

A: It is required to balance the following chemical equations, which can be done as,Part AThe balancing…

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.