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An object weighing 335 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 265 N. Immersed in oil, the object weighs 285 N. (a) Find the density of the object.
Chemical reactions are typically faster when a catalyst is added. This is because... 1. Molecules are moving faster when a catalyst is added
A gas-filled balloon having a volume of 2.50 L at 1.2 bar and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°C and 3.00 10-3 atm, respectively. Calculate the final v..
hydrogen and nitrogen react to form ammonia nh3. write the balanced equation and determine how many moles of nitrogen
The delta H sub f of FeBr3 is -269 kJ/mol and the delta H for the reaction 2Fe (s) + 3Br2 (g)----> 2Br3 (s) is -631 kJ/mol . Calculate the Delta H of evaporation of Br2 (l) which is a liquid at 25 degrees Celcius.
A solution containing 0.190 g. of this enzyme in 187. mL of solution has an osmotic pressure at 298 K. of 1.18 torr. What is the molar mass of this new enzyme
A bicycle tire is filled with air to a pressure of 720 torr at a temperature of 19 degrees Celsius. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 degrees Celsius.
b) Determine the hybrid state of each C. c) Draw the molecule geometrically correctly showing its ?- and ?-bonds and the atomic orbitals used to form each bond.
A sample conaining both HCl and HNO3 had a density of 1.083g/ml. A 30.00 ml amount of this sample required 25.78 ml of 0.3248 M NaOH for titration. Another 30.00 ml amount of this sample required 24.47 ml of 0.1327 M AgNO3 for titration
Predict the reactivity, state at room temperature and relative sizes of the following elements: (make a chart organize your information) Barium, Potassium, Chlorine, Oxygen, Iodine, Iron, Neon, Radon.
Discuss in detail the healthcare applications of chemical reactions. Which chemical reactions would you consider to be of importance to healthcare professionals?
What is the mass percent of a sodium fluoride solution prepared by dissolving 0.64 moles of sodium fluoride into 63.5 grams of water?
For the reaction what is the cell potential at 25 if the concentrations are 0.653 , 0.173 , and 0.852 and the pressure of is 6.80
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