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You have a solution of sodium nitrate containing 140 g at 65 degrees celcius. How many additional grams of solute must be added to it to make the solution saturated.
if you started a ride with ice packs that held 1600g of frozen water at 0 degree celius, and the temperature of the water at the end of the ride is 32 degree celius,determine how many calories of he
A biochemical engineer isolates a bacterial gene fragment and dissolves a 10mg sample in enough water to make 30ml of solution. the osmotic pressure of the solution is .340 torr at 25 degrees C. th
The total mass of pure metals produced is 0.4684 g. Calculate the mass percent of AgNO3, CuCl2, and FeCl3 in the original mixture.
An intermediate step in the industrial production of nitric acid involves the reaction of ammonia with oxygen gas to form nitrogen monoxide and water. how many grams of nitrogen monoxide can form by
Use the data given below to estimate the temperature at which this reaction will become spontaneous under standard state conditions.
When silver metal reacts with bromine at 298 k, a spntaneous redox reaction takes place. calculate E initial and calculate the wquilibrium constant.
A reaction has an activation energy of 123 kJ/mol and a rate constant of 0.200 s-1 at 311K. At what temperature will the rate constant be double that at 311 K?
What is the value of the equilibrium constant for the neutralization of acetic acid with sodium hydroxide? The Ka for acetic acid is 1.8 x 10-5.
How many grams of caffeine (C8H10N4O2) are present in one cup of coffee that contains 8.98 × 1021 caffeine molecules?
How many liters of water can be made from 55g of oxygen gas & an excess of hydrogen at a pressure of 12.4 atm & a temp of 85 degrees C?
A 155 gram sample of copper was heated to 150 degrees Celsius then placed into 250 gram of water at 19.8 degrees Celsius. Calculate the final temperature of the mixture.
What volume of O2 will form in 66.4 seconds at a barometric pressure of 703.0 . (The vapor pressure of water at this temperature is 17.5 )
The leathal inhalation does of sarin for a 200 pound person has been determined to be .0015mg. Determine the LD50 of Sarin that researchers used to calculate the leathal inhalation dose?
An ice cube tray holds 515 g water. If the water initially has a temperature of 21°C, how many kilojoules of heat must be removed to cool and freeze the water at 0°C?
The cadmium ion was then masked by using an HCN/NaCN buffer to bring the pH of a second 25.00mL aliquot to 10; 32.70mL of the 0.01080M EDTA standard was used in this titration and involved only the
Dissolved .31 grams of KHP in 25 ml of water and it required 15.5ml of NaOH to reach end of titration, how many moles of KHP were originally present before the addition of the NaOH?
A gaseous mixture of and contains 34.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 305 ?
The simplest formula of a substance is found to be CH2O, and its approximate molar mass is found by experiment to be 93 g•mol-1. What is its exact molar mass?
An unknown salt is either NaF, NaCl or NaOCl.When 0.050 mol of the salt is dissolved in water for form 0.500 L of solution, the pH of the solution is 8.08. What is the identity of the salt?
A few compounds exist whose solubility decreases as the temperature increases. How would the values for ΔG, ΔH, and ΔS for these reactions be different from those values observed f
Determine the mass of lithium hydroxide produced when 0.38 g of lithium nitride reacts with water to make Ammonia (NH3) and Lithium hydroxide.
In the titration of 63.0 mL of 1.0 M methylamine, CH3NH2 (Kb = 4.4 multiplied by 10-4), with 0.50 M HCl, calculate the pH under the following conditions.