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A skydiver falls d1=440 meters in t1=7.7s before opening his parachute. after the parachute opens, he falls an additional d2=715meters in t2=91s.
What is the skydivers average speed during the entire fall, v, in meters per second?
85.0 mL of H2O is initially at room temperature (22. 0C). A chilled steel rod at 2.0 C is placed in the water. If the final temperature of the system is 21. 0C
Throughout the photosynthetic activity of algae the pH of the water is 10.0. Compute CO2, HCO3, CO3(2-), and OH- and the weight of biomass, CH2O produced. Presume no input of atmospheric CO2.
A solution was made by dissolving 5.38 g of a non-volatile solute in 137.7 g of acetone. The solution boiled 1.77 ºC above the boiling point of acetone. Determine the molar mass in g/mol of the solute. Kb = 1.71 ºC/molal.
A gas-filled balloon having a volume of 4.00 L at 1.2 atm 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 multiplied by 10-3 atm, respectively. Calcula..
105 grams of iron fe is heated in test tube until it is 100 degrees c. then the iron is poured into a calorimeter
Problem- Cesium metal is frequently used in photoelectric cells because the amount of energy necessary to eject electrons from a cesium surface is relatively small -only 188 kJ/mol. What wavelength of light (in nanometers) does this correspond to
While a 0.579g sample of a mixture of volatile hydrocarbons is burned in a bomb calorimeter with a heat capacity of 3389 J/degrees Celsius, the temperature rises by 6.40 degrees Celsius. Explain how much energy (in kilojoules) is released during c..
Devise a suitable reaction sequence in which each of the following compounds can be prepared from benzene in good yield. Assume ortho and para isomers are separate from one another, and use any other reagents you desire.
Calculate the molar mass of a gas that has a density of 0.232 g/L at 156 oC and 222 torr. Use R = 0.0821 L-atm/mol-K for the value of the gas constant.
a mixture of gases containing .20 mol of SO2 and .2 mol of O2 in a 2.0L flask reacts to form SO3. If the temperature is 25C, what is the pressure in the flask after reaction is complete?
A 13.6 g of copper at 90.5 degrees celsius is dropped into 150.0g of water at 20.0 degrees celsius. The specific heat of copper is 0.385 J/g.K
Write a 3 page paper (including separate title and reference pages). The paper must be at least 1300 words. Identify the factors that could have caused or lead (Pathogenesis) to the particular disease or condition, the signs and symptoms, and other a..
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