Determine the molar mass of chloroform gas if a sample weighing 0.389 g is collected in...

Determine the molar mass of chloroform gas if a sample weighing 0.389 g is collected in a flask with a volume of 102 cm3at 97C. The pressure of the chloroform is 728 mmH

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queen_honey_blossom answered 2 years ago

A sample weighing 3.027 g is a mixture of Fe2O3 (molar mass = 159.69) and Al2O3...

A sample weighing 3.027 g is a mixture of Fe2O3 (molar mass = 159.69) and Al2O3 (molar mass = 101.96). When heat and a stream of H2 gas is applied to the sample, the Fe2O3 reacts to form metallic Fe and H2O(g). The Al2O3 does not react. If the sample residue (the solid species remaining after the reaction) weighs 2.889 g, what is the mass fraction of Fe2O3 in the original sample?

A sample weighing 3.082 g is a mixture of Fe2O3 (molar mass = 159.69) and Al2O3...

A sample weighing 3.082 g is a mixture of Fe2O3 (molar mass = 159.69) and Al2O3 (molar mass = 101.96). When heat and a stream of H2 gas is applied to the sample, the Fe2O3 reacts to form metallic Fe and H2O(g). The Al2O3 does not react. If the sample residue (the solid species remaining after the reaction) weighs 2.637 g, what is the mass fraction of Fe2O3 in the original sample?

An extremely small sample of an ideal diatomic gas (with a molar mass of 28 g/mol)...

An extremely small sample of an ideal diatomic gas (with a molar mass of 28 g/mol) has the following distribution of molecular speeds: 1 molecule moving at 100 m/s, 2 molecules at 200 m/s, 4 at 300 m/s, and 3 at 400 m/s. What is the rms speed of the distribution? What is the average kinetic energy of translational motion per molecule? What is the temperature of this sample?

A 0.520 g sample of a diprotic acid with a molar mass of 255.8 g/mol is...

A 0.520 g sample of a diprotic acid with a molar mass of 255.8 g/mol is dissolved in water to a total volume of 23.0 mL . The solution is then titrated with a saturated calcium hydroxide solution. a. Assuming that the pKa values for each ionization step are sufficiently different to see two equivalence points, determine the volume of added base for the first and second equivalence points. b. The pH after adding 23.0 mL of the base was...

a) Calculate the molar mass of 118.8 g of an anesthetic gas that occupies 13.46 L...

a) Calculate the molar mass of 118.8 g of an anesthetic gas that occupies 13.46 L at temperature and pressure of 22°C and 1.08 atm, respectively. b) Chemical analysis showed that the gas contained C=12.1%, F=28.8%, Cl=18.2%, Br=40.4% and H=0.5%, by mass. Determine the chemical formula of the gas. Atomic weights: C=12, F=19, Cl=35.5, Br=80, H=1. Calculate the molar mass of 6.7 g of N2 (gas) – O2 (gas) mixture that occupies a volume of 5.6 L at 22°C temperature...

A .435 g sample of a nonvolatile, nonionizable solute with a molar mass of 67.4 g/mol...

A .435 g sample of a nonvolatile, nonionizable solute with a molar mass of 67.4 g/mol is dissolved in 15.1 g of cyclohexane. Calculate the molar concentration of solute in the solution. Calculate the boiling point of the solution described. Calculate the freezing point of the solution described.

the density of the sample is 0.9977 g/mL and the molar mass of calcium carbonate is...

the density of the sample is 0.9977 g/mL and the molar mass of calcium carbonate is 100.0 g/mol. 2. Calculate the number of moles of calcium ions present in a 50.00 mL water sample that has a hardness of 75.0 ppm (hardness due to CaCO3). 3. If the 50.00 mL sample from problem 2 above was titrated with a 0.00500 M EDTA, what volume (in milliliters) of EDTA solution would be needed to reach the endpoint? If someone could show...

A 0.5065 g solid sample containing a mixture of LaCl3 (molar mass = 245.26 g/mol) and...

A 0.5065 g solid sample containing a mixture of LaCl3 (molar mass = 245.26 g/mol) and Ce(NO3)3 (molar mass = 326.13 g/mol) was dissolved in water. The solution was titrated with KIO3, producing the precipitates La(IO3)3(s) and Ce(IO3)3(s). For the complete titration of both La3 and Ce3 , 44.81 mL of 0.1252 M KIO3 was required. Calculate the mass fraction of La and Ce in the sample.

A 0.1276−g sample of a monoprotic acid (molar mass = 1.10 × 102 g/mol) was dissolved...

A 0.1276−g sample of a monoprotic acid (molar mass = 1.10 × 102 g/mol) was dissolved in 25.0 mL of water and titrated with 0.0633 M NaOH. After 10.0 mL of base had been added, the pH was determined to be 4.87. What is the Ka for the acid? Answer in scientific notation.

A 0.5072 g solid sample containing a mixture of LaCl3 (molar mass = 245.26 g/mol) and...

A 0.5072 g solid sample containing a mixture of LaCl3 (molar mass = 245.26 g/mol) and Ce(NO3)3 (molar mass = 326.13 g/mol) was dissolved in water. The solution was titrated with KIO3, producing the precipitates La(IO3)3(s) and Ce(IO3)3(s). For the complete titration of both La3 and Ce3 , 44.01 mL of 0.1289 M KIO3 was required. Calculate the mass fraction of La and Ce in the sample.

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