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

A: Given -> CaCO3(s) -----> CaO(s) + CO2(g)  Weight of sample = 2.237 gm  Weight of CO2 formed =…

Q: . How many oxygen atoms are in 76.3 g N2O4? Conversion must be set-up in one step using dimensional…

A:

Q: A 0.4647 g sample of CxHyOz was burned. The combustion produced .8635 g CO, and 0.1767 g H,O.…

A:

Q: A particular compound is comprised only of the elements C, H, N, and Cl. Combustion analysis of…

A: Given that: Total mass of sample = 14.30 g Mass of CO2 = 31.22 g Mass of H2O = 6.764 g Mass % of N=…

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

A: Number of moles of barium chloride and water is determined as given below:

Q: A 50.00 g sample of an organic compound containing only C, H and O is analyzed by combustion…

A: The objective of the question is to determine the empirical formula of the organic compound…

Q: 4.33 g sample of a compound consisting of carbon, hydrogen, oxygen, nitrogen, and sulfur was…

A:

Q: II. Empirical Formula 1. A compound contains 40.92 % C, 4.58% H, and 54.50% O by mass. What is the…

A: Determination of empirical formula The percentage composition of elements present in given compound…

Q: Determine the empirical formula for each substance. A dead alkaline battery is found to contain a…

A:

Q: D. Calculate the mass (g) of the following samples. 25) 238 moles of lead 26) 1.54 x 10° moles of Zn…

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

Q: A sample of NH3 has a mass of 84.06 grams.   Calculate the moles of NH3 in the sample.…

A: Given : Mass of NH3 = 84.06 g

Q: Convert 3.21 x 1021 grams of X5Z, into molecules/formula units of the same compound. (Assume that…

A: Molar mass of X  = 47.56 g/mol Molar mass of Z = 22.9 g/mol First, calculate Number of moles of X5Z6…

Q: 1.A compound is composed of the elements C, H, O, and Br. Combustion analysis of a 6.17 g sample of…

A: The amount of CO2 formed from 6.17 g of the sample = 3.91 g The amount of H2O formed from 6.17 g of…

Q: Ammonium nitrate is a common ingredient found in many fertilizers and is the main component that…

A: Introduction Ammonium nitrate has the chemical formula NH4NO3, and ammonium hydrogen phosphate has…

Q: 6. A student reported the following percentages for his unknown mixture: 25% NH4CI, 30% NaCI, and…

A:

Q: What is the mass percent of silicon dioxide (SiO2) if you are able to separate 2.202g out of a…

A: The mass percentage of a compound in a mixture is equal to the ratio of the mass of that compound…

Q: Xylene, an organic compound that is a major component of many gasoline blends, contains carbon and…

A: Xylene, an organic compound and contains carbon and hydrogen only. Mass of xylene sample=17.12 mg…

Q: Find the percent, by weight, of each component.

A:

Q: A certain organic acid contains 26.68 % carbon, 2.24 % hydrogen, and 71.08% oxygen by mass. A 0.050…

A:

Q: 1.Glucose is an important biological molecule with the molecular formula C₆H₁₂O₆. What is its…

A: 1.Glucose is an important biological molecule with the molecular formula is C₆H₁₂O₆. An empirical…

Q: What is the percent NaCl in the sample?

A:

Q: A student determined the mass of NaCl extracted during an experiment to be 0.42 grams. If the mass…

A: Given  Mass of NaCl = 0.42 g Mass of original mixture = 1.97 g

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: 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: A sample of pure lithium nitrate contains 10.1% lithium by mass. What is the % lithium by mass in a…

A: Lithium nitrate contains 10.1% lithium by mass.

Q: c solvent) that contains 1.00 × 1012 molecules

A: moles of CHCl3 = ( molecules / Avagadro number )  moles of CHCl3 = ( 1.00 • 10^12 ) / ( 6.022 •…

Q: Upon combustion, a 0.8009g sample of a compound containing only C, H, and O produced 1.6004g…

A: Empirical formula is a representation of a compound wherein all the atoms comprising the compounds…

Q: An unknown compound has the following chemical formula: Mn (CN) where x stands for a whole number.…

A: Mole of carbon= 5.9Mole of Mn = 3.0

Q: a) A compound is found to contain 52.13 % carbon, 13.15 % hydrogen, and 34.72 % oxygen by mass.What…

A: (a) Given: Mass percent composition of hydrogen is 13.15% Mass percent composition of carbon is…

Q: Convert 6.76 x 1024 molecules/formula units of X4Z4 into grams of the same compound. (Assume that…

A: Molar Mass Of X4Z4 = 4 × molar mass of X + 4 × molar mass of Z = (4 × 32.75) g/mole + (4 × 51.8)…

Q: 39. Calculate the number of molecules present in each of the following samples. a. 4.75 mmol of…

A: We know that for 1 mole of any chemical compound/species,there are Avogadro's number of molecules…

Q: 1. Suppose that you weigh out 6.95 g of CuSO4.5 H₂O at the beginning of the experiment. How many…

A: Given, mass of CuSO4.5H2O = 6.95 g moles of Cu2+ in the sample = ? Note: molar mass of CuSO4.5H2O =…

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.