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Get college assignment help at uniessay writers What is the percent yield of a reaction in which 256 g phosphorus trichloride reacts with excess water to form 139 g HCl and aqueous phosphorus acid (H3PO3)?

A 100. L flask contains a mixture of methane, CH4 and

A 100. L flask contains a mixture of methane, CH4 and argon at 25 degrees Celsius. the mass of argon present is 228 g and the mole fraction of methane in the mixture is .650. Calculate the total kinetic energy of the gaseous mixture

A 1.80-g sample of a large biomolecule was dissolved in 19.0

A 1.80-g sample of a large biomolecule was dissolved in 19.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point constant is 5.03°C · kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.

A solution is 2.25% (m/m) by weight NaHCO3. How many grams

A solution is 2.25% (m/m) by weight NaHCO3. How many grams of NaHCO3 are in 350.0 g of solution?

what is the dipole drawing for H2Se?

what is the dipole drawing for H2Se?

Determine the volume of O2 (at STP) formed when 50.0 g

Determine the volume of O2 (at STP) formed when 50.0 g of KClO3 decomposes according to the following reaction. The molar mass for KClO3 is 122.55 g/mol.

If 5.4 kcal of heat is added to 1.00 kg of

If 5.4 kcal of heat is added to 1.00 kg of water at 100 degrees celsius, how much steam at 100 degrees is produced? Please show your work for your answer.

Suppose a buffer solution is made from formic acid, HCHO2, and

Suppose a buffer solution is made from formic acid, HCHO2, and sodium formate, NaCHO2. What is the net ionic equation for the reaction that occurs when a small amount of sodium hydroxide is added to the buffer?

A 29.0-g sample of water at 260. K is mixed with

A 29.0-g sample of water at 260. K is mixed with 51.0 g water at 320. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. WebAssign will check your answer for the correct number of significant figures

How much heat is required to warm 1.70 L of water

How much heat is required to warm 1.70 L of water from 22.0^circ C to 100.0 ^circ {rm C}? (Assume a density of {1.0;{rm {g}}}/{{rm {mL}}} for the water.)

hat mass, in grams, of sodium carbonate is required for complete

Get college assignment help at uniessay writers hat mass, in grams, of sodium carbonate is required for complete reaction with 8.35 g of nitric acid to produce sodium nitrate, carbon dioxide, and water

Carbon absorbs energy at a wavelength of 150. nm. The total

Carbon absorbs energy at a wavelength of 150. nm. The total amount of energy emitted by a carbon sample is 1.86 105 J. Calculate the number of carbon atoms present in the sample, assuming that each atom emits one photon

What is the pH of the solution which results from mixing

What is the pH of the solution which results from mixing 150 mL of 0.50 M CH3CO2H(aq) and 150 mL of 0.50 M NaOH(aq) at 25 ºC? (Ka of CH3CO2H = 1.8 x 10-5)

question 8 please

question 8 please

A calorimeter contains 32.0 of water at 11.5. When 1.40 of

A calorimeter contains 32.0 of water at 11.5. When 1.40 of (a substance with a molar mass of 46.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 30.0

A solution is prepared by dissolving 10.6 g ammonium sulfate in

A solution is prepared by dissolving 10.6 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 10.00 mL sample of this stock solution is added to 60.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions in the final solution.

When the following reaction is balanced in acid solution using the

When the following reaction is balanced in acid solution using the lowest possible whole number coefficients, the coefficient of Cr3 (aq) will be: Cr2O72-(aq) CH3OH(aq) –> Cr3 (aq) HCO2H(aq)

A 2.78 L sample of hydrogen chloride (HCl) gas at 2.61

A 2.78 L sample of hydrogen chloride (HCl) gas at 2.61 atm and 28°C is completely dissolved in 651 mL of water to form hydrochloric acid solution. Calculate the molarity of the acid solution. Assume no change in volume.

How can you determine the root-mean-square speed given the average kinetic

How can you determine the root-mean-square speed given the average kinetic energy?

A student doing this experiment was puzzled by the fact that

A student doing this experiment was puzzled by the fact that while each of the individual solutions being used is dangerous, the mixture made combining the two solutions is much less dangerous. Actually, the resulting mixture could be safely disposed of by pouring it into the drain and diluting with a large amount of running water. describe the harzards of each of the solutions. Explain whe the mixture is not as hazardous as the original solutions from a waste disposal point of view

Could someone help me with these molecular formulas, i dont know

Could someone help me with these molecular formulas, i dont know what im doing wrong. For this example, i did it like this and it says its incorrect. Could you solve the the equations below your way and i match it to mines? Thank you so much Fe (s) Ni(NO3)2 (aq) =Fe(NO3)2 (aq) Ni (s) FeCl3(s) K3PO4(aq)= CaCl2(s) K3PO4(aq) FeCl3(s) KNO3(aq) Fe2(SO4)3 (aq) K3PO4(aq) CuBr2(s) NH4OH(aq) ZnBr2 (s) NH4OH(aq) CuBr2 (s) NH4NO3(aq) CuSO4 (s) NH4OH(aq) NiCl2 (s) Na2CO3(aq) MgCl2 (s) Na2CO3(aq) NiCl2 (s) NaNO3(aq) NiSO4 (s) Na2CO3(aq

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