A student begins this experiment with 3.5251 g of mixture. After sublimating the NH4Cl, the student was left with a total mass of 2.1830 g. The student calculates the percent composition of NH4Cl and reports that it is 38.07%. What is wrong with this number?

Q: There are many minerals which contain silver. A 2.22 g sample of one of these, matildite, is placed…

A: The reaction between silve and magnesium chloride for analysis of Ag in matildite . 2 Ag + MgCl2 → 2…

Q: Cyclohexane C6H12  (given: density= 0.77g/ml) Mass:84.9 g How many moles, molecules and total atoms…

A: I am providing you an image where you can have all the explanations related to this problem please…

Q: You are drying a sample of Ba3(PO4)2. After 5 minutes of drying it weighs 1.2034 g. You continue to…

A: Answer: Percent change in mass will be the ratio of change in mass with initial mass, therefore %…

Q: How many daL of bromine are in 15.7 x 1022 molecules?  (The density of bromine is 3.1 g/cm3) The…

A: Given: The density of bromine = 3.1 g/cm3 We have to find How many daL of bromine are in 15.7 x 1022…

Q: b) In a second experiment to verify the value of x, the pharmacist heated a 3.752g sample of the…

A: Given, mass of sample of lysine hydrate =3.752 g mass of sample after heating =  3.278 g

Q: In this quantity of gold? [4.5 9. 64,456 g/mol) in A 55kg woman has 7.5 x 10-3 mol of hemoglobin…

A: The given data contains,  =7.5 ×10-3According to mole concept,1 mole of compound contains 6.022…

Q: A student weighs an empty beaker at 81.702 g. A sample of MgSO4·??H2O is added to the beaker, and it…

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Q: Determine the mol H2O/mol CaSO4 if you have the following data to teo decimal places. Mass of…

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Q: A student measures the mass of a sample of a metallic element, M. Then the student heats the sample…

A: Given: Mass of metal M is measured. And then the mass of compound MO forming after heating it with…

Q: A student weighs an empty beaker at 85.301 g. A sample of Na2SO4·??H2O is added to the beaker, and…

A: Mass of empty beaker = 85.301 g  Mass of beaker + hydrated salt = 86.607 g  Mass of beaker +…

Q: What is the Mass pf Cl- found in the water sample (in grams)? %(w/w) Cl- in the water sample?…

A: Given data,Mass of titrant(AgNO3) used in trial 1=0.76gMass of AgNO3 used in trial 2=0.73gMass of…

Q: If you have a total of 5.2 grams of a mixture and 2.0 grams of that mixture is determined to be…

A:

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: Be sure to answer all parts. Fermentation is a complex chemical process of wine making in which…

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Q: Chocolate Chunk Raisin Oatmeal Cookies Recipe Ingredients 1.806 x 1023 molecules white sugar 1 1/5…

A: Molecular weight of white sugar (C12H22O11) = 342 Molecular weight of baking soda (NaHCO3) = 84…

Q: Chromium metal is obtained by heating chromium(III) oxide with carbon. Calculate the mass percent of…

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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: n a chemical reaction between iron and sulfur to produce FexSy3  it was found that 12.92 g of sulfur…

A:

Q: Be sure to answer all parts. Fermentation is a complex chemical process of wine making in which…

A: Given, the chemical reaction is as follows,C6H12O6→2C2H5OH+2CO2amount of glucose for reaction =805.6…

Q: A 1.67 mg sample of a compound containing carbon, hydrogen, and oxygen underwent combustion…

A: Hi there, as there are multiple questions posted. We are answering the first question. If you need…

Q: You can also calculate percent composition from a formula. This is similar to percent abundance in…

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Q: You have a sample of soil. Soil is a heterogeneous mixture. You separate the different size…

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Q: SOLUTE (NONELECTROLYTE) SOLVENT (WATER) Mass (g) MW (g/mol) Density (g/mL) 60 700 200 18 1.5 1.0

A: Answer: In this question we have to find out the value of different concentration terms with the…

Q: A titanium ore contains rutile (TiO2) plus some oxides of iron and silica. When it is heated with…

A: Reaction: TiO2 + C + Cl2 ---> TiCl4 + Cl2 molecular mass of TiO2 = 79.866 g/mol molecular mass of…

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: 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: You need to make up 500.0 mL's of 0.5750 M NaCl (58.44 g/mol). What mass of NaCl should you measure…

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Q: Calculate the mass of each sample, express your answer with the appropriate units. 14.7 mol HNO2…

A: 1 mole = 6.022×1023 [Avogadro's number] The mass of one mole of molecules of a substance is known as…

Q: 50.0 mL 2.00M HCI and 50.0 mL 2.00 M NaOH mixed: HCI(aq) + NaOH(aq) → H,0() + NaCI(aq) - Csoln =…

A: In just above step of  circled part, we have calculated the total heat released during the reaction…

Q: You analyze a sample of a compound you made in the lab and find that it has a percent composition by…

A: Answer: Empirical formula is C4H2O and three answers from the  given list are C4, H2, and O.

Q: What is the percentage by mass of a silver ring that has a mass of 12.0 g and contains 11.1 g of…

A: Total mass of the silver ring = 12g  Mass of pure silver in the ring = 11.1g  Formula to find the…

Q: 1. Write an equation showing how the mass of the substance sought can be converted to the mass of…

A: NOTE

Q: A student finds that they have 0.2545 g of NH4Cl, 1.1502 g of NaCl, and 1.0181 g of SiO2. Calculate…

A: Given  mass of NH4Cl = 0.2545g mass of NaCl = 1.1502 g mass of  SiO2 = 1.0181 g Initial mass if…

Q: What is the percent NaCl in the sample?

A:

Q: Be sure to answer all parts. How many H atoms are in 84.9 g of isopropanol (rubbing alcohol), C3H,0?…

A: We have to calculate the number of H atoms in 84.9 g of isopropanol.

Q: A 5.000 g sample that contained NaCl and BaCl2 2H2O was heated. After heating the sample had a…

A: We have to calculate the % NaCl in the sample.

Q: 2. Calculate the constituents below in units of mass per volume. Give your answers in the most…

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Q: Suppose you are performing an experiment in which you produce a solid and measure its mass. You run…

A: Solution:- Given Data => Trial number Mass of product 1 2.59 g 2 2.26 g 3 1.91 g 4…

Q: Make the following conversions: 1. 62.13 kg of Al to moles 2. 0.0235 moles of sugar, C,H,,O,, to…

A: For these conversions molar mass of each one is required.

Q: You are given a sample that contains a mixture of the following two arsenic-containing minerals:…

A: Given : Mass of mixture = 57.38 g Mass of As2O5 formed = 36.03 g Assuming moles of NiAsS in the…

Q: Moles of  water in copper (II) sulfate n hydrate? Mass of copper (II) sulfate n hydrate= 4.738g…

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Q: 1. CuSO4 a. copper(I) sulfate b. copper sulfate c. copper(II) sulfate d. copper sulphide 2. Nal a.…

A: (1) Copper is a d block element, which is also known as transition element. It has atomic number of…

Q: a 0.755g sample of hydrated copper sulfate of hydrated copper sulfate CuSO4.XH2O was heated…

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Q: 1. H2SO4 (aq), НО OH 2. LAH 3. H30*

A:

Q: Why should a pure compound have a definite composition by weight? how is it possible for two samples…

A: We need to explain why a pure compound is expected to have a definite composition.  Definite…

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: If 0.537 g of copper completely reacts with 0.321 g of fluorine to form a compound, what is the…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: You weigh a dry flask, and place a chunk of solid into it. then weigh it again. You then fill the…

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Q: 2NH3(g) + 3Cu0(s) N2(g) + 3Cu(s) + 3H20(1) a) If a sample containing 18.1 g of NH3 reacted with 90.4…

A: Limiting reactant :- Reactant which is present in lesser amount than required as per  balanced…

Q: Compound Quantity Density Molecular weight 0.789 Ethanol 2.2 mL g/mL 46.07 g/mol 1.049 g/mL Acetic…

A: Answer :-  Moles of Ethyl Acetate, CH3COOC2H5 = 0.0377 mol…

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.