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75.0 g of ammonium sulfate is placed in a 500.0 ml flask and diluted volume.
1) What is the percent by mass concentration of this solution? (assume the solution density is 1.00 g/ml)
2) What is the molarity of the solution?
3) How many moles of ions are present in the flask?
The mass of 158 mL of the gas, measured at 556 mmHg and 310 K is found to be 0.275 g. What is the molecular formula of the compond?
The enthalpies of formation of oxalic acid in the solid and aqueous phases are -826.8 and -818.8 kJ/mol, respectively. The heat capacity of water is 4.184 J/g*K. Ignore the heat capacity of oxalic acid.
Hydrogen gas was collected by downward displacement of water. A volume of 0.600 L of gas was collected at 25.0 °C and 740.0 torr. What volume will the dry hydrogen occupy at STP? The vapor pressure of water is 21.2 torr at 25.0 °C.
Initially 5 mol of an ideal gas with Cv,m=12.5 J K^-1 mol^-1 are at a volume of 5 dm^3 and a temperature of 300K. If the gas is heated to 373 K and the volume changed to 10 dm^3, what is the entropy change
a 2.0l kettle contains 116g of boiler scale caco3. how many times would the kettle have to be compleletly filled with
Calculate the number of [CH2CHOH] monomer units in the average strand of PVA (78,000 g/mol).
For each alkene, indicate the direction of the dipole moment. For each pair, determine which compound has the larger dipole moment. a) cis-1,2-difluoroethene and trans-1,2-difluorothene
2 liquids, A and B, have the same molecular weight. Samples of each are placed on temperature probes and allowed to evaporate. After a period of time Liquid A had a change in temp
write an equation that shows the formation of the chloride ion from a neutral chlorine
You have 200ml of a solution which is 0.2M NH3 and contains 0.23grams of NH4Cl. a. What type solution is it? b. What is the pH of the solution
Name a few solutions you come in contact with every day. What substances make up these solutions. What is the solvent and the solute
How does viscosity relate to energy dissipation. Is it simply the higher viscosity, the greater energy release
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