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An analysis shows that 2.97 g of iron metal combines with oxygen to form 4.25 g of an oxide of iron. What is the empirical formula of the compound?
A 11.0-g wad of sticky clay is hurled horizontally at a 130-g wooden block initially at rest on a horizontal surface. what was the speed of the clay immediately before impact
A galvanic cell is produced as follows: Left half-cell has a Pt wire dipping into a beaker containing an equimolar mixture of Cr+2 and Cr+3 . [Cr3+ + e-??Cr+2 E°-= -0.42 V] Right hand cell has a
Suppose you are riding a stationary exercise bicycle, and the electronic meter indicates that the wheel is rotating at 12.7 rad/s. how far would you have gone if the bike could move
Write about it using the criteria outlined and If the topic does not lend itself to these criteria, it is probably not a good topic to consider.
Starting with 1.20 mL of an alcohol (MW 88, d = 0.8114 g/mL) and 3 mL of glacial acetic acid (MW 60, d=1.06 g/mL), calculate the theoretical yield in moles.
A motorcycle accelerates uniformly from rest and reaches a linear speed of 21.3 m/s in a time of 9.60 s. find the magnitude of the angular acceleration of each tire
An object is placed 130 cm in front of a converging lens of focal length 16 cm. What is the distance to the image
50 mL of 0.1200 M hydroxyacetic acid (pKa = 3.83) are titrated with 0.1280 M KOH. What is the pH after the addition of 48.6 mL of the base
A kite is hovering over the ground at the end of a straight 44-m line. The tension in the line has a magnitude of 15 N. Find the height of the kite
Find q of a reaction. A cup calorimeter contains 50.0 mL of 0.500 M NaOH at 25C. Then 25.0 mL of .500 M HCl at 25 C is added. After reaction, the final temperature = 27.21 C. What is q in KJ. Given
A satellite has a mass of 5555 kg and is in a circular orbit 4.20 105 m above the surface of a planet. What would be the true weight of the satellite if it were at rest on the planet's surface
The calorimeter temperature rises 0.42°C. The calorimeter and water have a combined heat capacity of 32.16 kJ/K. Calculate the heat of formation of ammonia, ?H°f, in kJ/mol. The formation re
A 284-kg motorcycle is accelerating up along a ramp that is inclined 30.0º above the horizontal. Find the magnitude of the motorcycle's acceleration.
According to Boyle's law, for a fixed quantity of gas at a given temperature, what quantity relating pressure and volume is constant
A heat pump extracts 7.0*10^6 J heat per hour from a well at 280K and delivers its output heat into a house at 320K. what minimum work must be supplied to the heat pump per hour
We did a lab on equilibrium and le chatelier's principle. On one portion, there was a copper complex, and we had to add different components to a solution and write down the changes that took place
Identify all the possible macrostate and the corresponding microstates in a system consisting of two communicating containers and four atoms
Should the US have universal health care? Why or why not? Cite references to back your opinion - We will have to make hard choices between competing goods, both as families and as a nation." Presiden
Rank the compounds(acetone,butane,acetic acid, 2-propanol, 2-methylpropane, 1-propanol) by vapor pressure, label the one that has the lowest vapor pressure and the one that has the highest.
A heat pump is found to remove 2400 J of heat from the exterior of a house and deliver 3500 J of heat to the interior of the house
A Carnot engine operates between hot and cold reservoirs with temperatures 527 Degrees Celsius and -73 Degrees Celsius. how much heat is extracted per cycle from the hot reservoir
A 0.1036 g sample containing only BaCl2 and NaCl is dissolved in 50 mL of distilled water. Titration with 0.07916 M AgNO3 requires 19.46 mL to reach the endpoint. What is the % by wt. of NaCl in the
A heat engine operates in a Carnot cycle between reservoirs of temperatures 1000K and 400K. What is the work output per cycle
What is the pressure in a 15.6L cylinder filled with 45.5g of oxygen gas at a temperature of 310K