Analyses of several samples of a material containing only iron and oxygen gave the following results. Could this material be a compound? Mass of Sample 1.518 g 2.056 g 1.873 g Sample A Sample B Sample C Mass of Iron 1.094 g 1.449 g 1.335 g Mass of Oxygen 0.424 g 0.607 g 0.538 g

Q: Briefly describe the purpose and importance of the following procedures in the analytical process:…

A: Sample preparation is the most important step in chemical analysis to start with.

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: A sample of C,H, has 7.20 x 1024 H atoms. How many carbon atoms does the sample contain? number of…

A: Given : The compound is C3H8. And number of H atoms in compound = 7.20 X 1024 atoms. The number of…

Q: a. What is the mass of 1.49 x 1024 atoms of chlorine? grams b. What is the mass of 9.12 x 1023…

A: a) mass of 1.49×1024 atoms of chlorine.

Q: sample

A:

Q: Identify the choice that best completes the statement or answers the question. Analysis of a…

A: According to law of constant proportion, the ratio of mass of elements in any fixed compound will…

Q: 12. What mass of carbon di a. 0.468 g b. 2.81 g

A: Given reaction,  C6H14 + 13CO2 -------->6CO2 + 7H2O we have to find mass of CO2 produced by 5.50…

Q: From the given data below, calculate the % ash of the sample. Weight of the empty container: 16.8967…

A: The mass % is equal to the ratio of mass to the total mass of the substance multiplied by 100. The…

Q: A 2.45 g sample of magnesium completely reacts with oxygen to form 4.06 g of magnesium oxide. Use…

A: Given : Mass of Mg = 2.45g Mass of MgO = 4.06g

Q: Determine the correct number of significant figures the mass (g) of a mineral that is 20.67% by the…

A: Given that the mass percent of a mineral in titanium dioxide is 20.67 percent and the Mass of…

Q: 16) A 0.0758-g tungsten filament 17) A 1.50-g silver coin 18) A 60.0 g sample of FeCl3

A: Given that : We have to calculate the number of moles contained in each of the following samples :…

Q: Use the standard entropy data to determine the change in entropy for each of the reactions listed (…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: We have 425 cm3 of a material. How many g is it? The material has density of 0.345 g/cm O 68.0 g O…

A: We have to find mass ,volume and density  is given in the question  Volume of the material = 425 cm3…

Q: Questions 29 and 30 refer to the following information There are two possible compounds made from…

A: Given Mass of beaker  = A 47.94 g Mass of beaker + Lead chloride. = B 51.43 g Mass of Lead…

Q: Three samples of compounds we analyzed for the elemental compositions and the following results were…

A: The technique in which a sample of a compound is analysed for its elemental composition is known as…

Q: 200 g of a silicon compound is decomposed, resulting in 41 g of solid silicon and the remainder of…

A: Calculate the number of moles of both the compounds. nSiClF3 = WSiClF3MSiClF3nSiClF3 =200 g120.5…

Q: An 86.04 g sample of H2SO4 is 91.22% pure. What is the mass of pure H2SO4 present in the sample?

A: % Purity = (Mass of pure substance x 100)/Mass of sample

Q: Determine the mass of sulfate in the powder (in grams) if 2.47 g of barium sulfate (BaSO4) formed.…

A: The question is based on the concept of quantitative estimation of sulphate present in the given…

Q: A 37.99 gram sample of a hydrate of COCL2 was heated thoroughly in a porcelain crucible, until its…

A: Given mass of the hydrated sample of CoCl2=37.99 grams. Give mass of anhydrous sample of CoCl2…

Q: 22) An 85.5-g sample of Hg in a barometer 23) A 0.251-g Ti metal heart valve 24) A 10.0-g sample of…

A: 22) Given: Mass of Hg = 85.5 g Atomic mass of Hg = 200.59 g/mol.

Q: . The electrolysis of water into hydrogen and oxygen is an example of ______ reaction. A.…

A: The electrolysis of water into hydrogen and oxygen is an example of decomposition reaction so…

Q: An analytical chemist measures the amount of Elements E, and E, in four samples of an unknown…

A: Given is a sample of X containing E1 and E2. To find: If X is pure? To find mass of E1 if X is 10…

Q: The table below sbows elements present in the Sun. The Sun's composition is similar to other main…

A: The sun is made up of hydrogen and helium in the maximum amount. All the elements produced in the…

Q: The mass of Cu (63.55 g/mol) used to create Cu2S was 16.95 grams. what theoretical mass of Cu2S…

A:

Q: Of the following, is the smallest mass. O 25 kg 2.5 x 10 mg O 2.5 x 105 pg O 2.5 x 10° fg O 2.5 x…

A:

Q: Chemists have determined that 18.0 g of water consists of 6.02 x 10 23 molecules. Determine the…

A: Given, 18 g of water consists of 6.02 x 1023 molecules. Container = 1 quart = 946.35 g

Q: A hydrated compound with a mass of 7.00g is heated. Its mass after heating is 5.63g. What is the…

A:

Q: 5. The term mole is a unit used to represent (1) density of particles (2) an element or compound's…

A:

Q: Tin reacts with oxygen to form tin oxide. In a particular laboratory experiment in which oxygen…

A: We will first find mass of sn, then mass of tin oxide. Using this we will calculate oxygen reacted.

Q: Determine the mol H2O/mol CaSO4 if you have the following data to two decimal places (MM H2O =18.02…

A: Moles are ratio of mass to molar mass of substance.

Q: Brass is an alloy of copper and zinc. Varying the mass percentages of the two metals produces…

A: Mass of Yellow zinc = 135 g Brass = an alloy of Cu and Zn Yellow zinc = A brass (34-37)% Zn by mass…

Q: If you have an 8.53 mg sample of phosphorus oxychloride and it contains 1.72 mg of phosphorus, what…

A: Mass of POCl3 = 8.53 mg Mass of P = 1.72 mg

Q: Three samples (A, B, and C) of pure substance composed ofsodium, sulfur, and oxygen were isolated…

A: A question based on elemental analysis, which is to be accomplished.

Q: Use the following information to determine the mass of chlorine combined with the magnesium to two…

A: Given, mass of crucible = 35.1  mass of crucible and magnesium = 38.92  mass of crucible and…

Q: An analytical chemist measures the amount of Elements E and E, in four samples of an unknown…

A: A pure substance will have the same composition of the elements present in it. The percentage of…

Q: An analytical chemist measures the amount of Elements E, and E, in four samples of an unknown…

A: Since the unknown substance, X contains elements E1 and E2, it can be either a compound of E1 and…

Q: What is the mass, in grams, of 5.23 moles of oxygen gas?

A: Number of moles of the substance is the ratio of mass to molar mass.

Q: A pure sample of compound X contains only carbon and oxygen in a mass ratio of 0.750 g C : 1.00 g O.…

A: A pure sample of compound X contains only carbon and oxygen in a mass ratio of 0.750 g C: 1.00 g O.…

Q: A sulfur dioxide gas sample has a volume of 242.62 mL at 242279 pascals and 82.99oF. Calculate the…

A:

Q: A 1.58 mole sample of a pure unknown substance has a density of 1.87 g/cm3. If the sample occupies a…

A: Given,Density = 1.87 g/cm3Volume = 188 cm3Mole = 1.58 mole

Q: Data Table 1 Day 2 Mass (g) Day 3 Mass (g) % Change Day 1 Mass (g) Beaker T 0% Acidic 1.73g 1369…

A: The percentage change of mass is as follows.

Q: Magnesium will burn in air to form both Mg3N2 and MgO. What mass of each product would be found if…

A: Given,  Magnesium will burn in air to form both Mg3N2 and MgO.…

Q: Liquid heptane, C,H,6 , burns in oxygen gas to yield carbon dioxide and water. What mass of carbon…

A:

Q: A drop of water has a volume of 50 uL. How many water molecules does it contain? The density of…

A: Given that,Volume of water = 50 micro L = 0.05mLDensity of water = 1.0 g/mLNow, you calculate the…

Q: he mass composition data for two compounds containing phosphorus and chlorine is shown below. Does…

A: we are given the composition of compound 1 and compound 2           PHOSPHORUS(P) CHLORINE(Cl)…

Q: A sulfur dioxide gas sample has a volume of 242.62 mL at 242279 pascals and 82.99oF. Calculate the…

A: Given,

Q: A student performed an experiment in Lesson 2 (the chemical reaction is shown below). The student's…

A: According to the law of conservation of the mass: The total mass of the system always remains…

Q: Analysis of a 40 g sample of water revealed a mass percent for lead of 3.23%. Calculate the number…

A: Percentage by mass of the substance in the solution mixture can be expressed as the ratio of mass of…

Q: An 8.53 mg sample contains 1.72 mg of phosphorous.  What is the mass percentage of phosphorous in…

A: Given  mass of phosphorous = 1.72 mg mass of compound = 8.53 mg  Formula : mass percentage of…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".