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Find the number of moles for the following:
If the interaction energy between a sodium ion and a chloride ion in table salt is 760 kJ/mol, what is the interaction energy between a zinc ion (Zn2+ ) and a sulfide ion (S2 ) in a hypothetical str
An unknown amount of water is mixed with 350 mL of a 6 M solution of NaOH solution. A 75 mL sample of the resulting solution is titrated to neutrality with 52.5 mL of 6 M HCl
Given the following equations and Ho values, determine the heat of reaction at 298 K for the reaction which occurs in a welder's acetylene torch.
If 5.09 103 kg each of NH3, O2, and CH4 are reacted, what mass of HCN and of H2O will be produced, assuming 100% yield?
Construct a reaction table for the process, and use it to calculate Kc at this temperature.
A sample of the sugar d-ribose (C5H10O5) of mass 0.727 g was placed in a calorimeter and then ignited in the presence of excess oxygen. The The temperature rose by 0.910 K. In a separate experiment
A student adds 6.40 mL of a 0.360 mL HCl solution to the beaker. How much will the pH change? The pka of acetic acid is 4.760.
a) when 34.0g of NH3 reacts with 96.0g of O2 what is the partial pressure of NO in the sealed container? b) what is the total pressure in the container?
What volumes of .200 M HCOOH and 2.00 M NaOH would make 300 mL of a buffer with the pH of one made from 475 mL of .200 M benzoic acid and 25 mL of 2.00 M NaOH?
The ratio of oxygen to carbon by mass in carbon monoxide is 1.33:1.00. Find the formula of an oxide of carbon in which the ratio by mass of oxygen to carbon is 2.00:1.00.
A sample of gas is heated. During the heating process, the volume of the gas increases 1.7 times. If the initial temperature of the gas is 80degrees C. what is the final temperature of the gas?
Will precipitation occur when the following solutions are mixed? Include states-of-matter under SATP conditions in your answer. Enter "NONE" if no reaction occurs.
A piece of silver metal has a mass of 2.365 g. If the density of silver is 10.5 g/cm3, what is the volume of the silver in cm3?
A 350 mL air sample collected at 35 degrees C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 57 degrees?
Titration of 80.0 ml of an unknown concentration of H3PO4 solution that requires 126 ml of .218 M KOH solution. What is the concentration of H3PO4 in M?
The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 710.0 torr at 64.7°C. What is the mole fraction of methanol i
If the activation energy for a given compound is found to be 42.0 kJ/mol, with a frequency factor of 8.0 × 1010 s-1, what is the rate constant for this reaction at 298 K?
What is the theoretical yield of aspirin if 175 kg of salicylic acid is allowed to react with 118 kg of acetic anhydride?
What will the volume of the sample become if 459 mL of an ideal gas at 27 °C and 1.05 atm is cooled to 15 °C and 0.997 atm?
7.17-g sample of potassium chlorate was decomposed according to the following equation:
A 1.248-g sample of limestone rock is pulverized and then treated with 30.00 mL of 1.035 M HCI solution. the excess acid then requires 11.56 mL of 1.010 M NaOH for neutralization. calculate the perc
the total volume of seawater is 1.5*10^21L. Assume that seawater contain 3.1 percent sodium chloride by mass and water and that its density is 1.03 g/mL. Calculate the total mass of sodium chloride
What is the molar solubility of silver cyanide in 0.075M NaCN? Ksp of NaCN is 1.2x10-16.
At 850 K, the value of equilibrium constant Kp for the ammonia synthesis reaction is .2650. If a vessel contains an initial reaction mixture in which [N2]= 0.0200 M, [H2]= 0.0250 M, and [N2H2]= 0.00