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Ask a A projectile is fired with an initial speed of 66.4m/sat an angle of 37.6? above the horizontal on a long flat firing range. Determine the direction of the projectile 1.32s after firing
First order decomposition in which the rate constant is 0.00830 sec-1, how long will it take (in minutes) until 0.309 mol/L of the compound is left, if there was 0.517 mol/L at the start
An object has a kinetic energy of 310 J and a momentum of magnitude 22.1 kg · m/s. Find the mass of the object
describe the preparation of 400 mL of a solution that is 0.0500 M in I-, starting with MgI2.
Draw complete lewis structure of condensed structural formula. (CH3)3(3 is a subscript)CCOCHCH2
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of BrO3- is tripled and that of Br- is tripled
What is the single-particle collisional frequency (for diatomic Nitrogen)at sea level, with 341 and 1.0 atm. The corresponding single-particle collisional frequency is reported as 10^10 s^-1.
When 0.60 grams of a molecular covalent compound is dissolved in 10 grams of water, the freezing point of the soludion is -1.86 C. Given that the freezing point of pure water is 0 C and that the fre
Consider a circuit with two resistors in parallel; R1=10 Ohm and R2=5 Ohm, Calculate the total current flowing through the battery
How much heat energy is liberated when 11.0 grams of manganese is used in the formation of Mn2O3. PHf° for Mn2O3 is -962.3 kJ/mol
A 31 μF capacitor is connected across a programmed power supply. find the power output from the power supply
The burning of 80.3 g of SiH4 at constant pressure gives off 3790 kJ of heat. Calculate ?H for this reaction.
Two scales on a voltmeter measure voltages up to 21.0 and 30.7 V, respectively. Determine the coil resistance
what is the pH of a Tris buffer (pka 8.1) prepared by adding 20 mL of 1M HCl to 100mL of a solution of 0.3M Tris
Chromatography in the presence of 6 M guanidine hydrochloride and 10mM 2-mercaptoethanol yields peaks of Mr 34000 and 26000. Explain what can be determined about the structure of this protein from t
A horizontal, 10 - m plank weighs 100N. It rests on two supports that are placed 1.0m from each end. What is the torque of the weight of the plank
To qualify to run in the 2005 Boston Marathon, a distance of 26.2 miles, an 18 year old woman had to have competed another marathon in 3 hours and 40 minutes or less. To qualify, what must a woman's
A 10 kg dog is standing on scale in an accelerating elevator. If the scale reads 5 kg, what is the acceleration of the elevator
If a wheelchair-marathon racer moving at 13.3 miles per hour expends energy at a rate of 635 Calories per hour, how much energy in Calories would be required to complete a marathon race (26.2 miles)
When the sum of all forces acting on a system is zero, the system is said to exist in a state of equillibrium. What is the mass corresponding to this force
How many kilograms of hydrogen would be required to generate the electricity needed for a typical house? Assume the home uses about 850 kWh of electricity per month,
A sports-ultility vehicle has an average mileage rating of 18 miles per gallon. How many galllons of gasoline are needed for a 397-mile trip
The "roasting" of 48.7 g of ZnS at constant pressure gives off 220. kJ of heat. Calculate the DH for this reaction. 2ZnS(s) + 3O2(g) ® 2ZnO(s) + 2SO2(g)c
write the net ionic equation, A stream of chlorine gas is passed through a solution of cold, dilute sodium hydroxide.