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A 3.5514 g of a chromium oxide was found to contain 2.4299 g of chromium and 1.1215 g oxygen. What is the empirical formula for this chromium oxide
Measurements with microelectrodes have shown that a 0.30-nm-diameter potassium ion(K+) channel carries a current of 1.8 pA, How many potassium ions pass through if the ion channel opens for 1.0 ms
Draw a representation of the 3-D structure of the anion, including only the bonding-pair electrons, and any sulfur lone-pair electrons. What is the orientation of the oxygen atoms with respect to eac
How many liters of O2 (g) are needed to react completely with 56.0 L of CH4 (g) at STP to produce CO2 (g) and H2O (g)? Given CH4 + 2O2---->CO2 + H2O
As a person walks, the femur (upper leg bone) slides in a socket in the hip, Find the frictional force on the bone in the hip joint
Which of the following was not a major technological innovation of Tang and Song China? The practice of foot binding
A sample of helium gas initially at 37.0 °C, 785 torr and 2.00 L was heated to 58.0 °C while the volume expanded to 3.24 L. What is the final pressure in atm
Find the torque required to over come the viscous force in a journal bearing having Radius of journal R , angular velocity w length of the bearing L and thickness of oil film t
What is the final volume of a balloon that was initially 500.0 mL at 25 °C and was then heated to 50 °C
In nomadic society prior to Chinggis Khan, The Carolingian empire initially fragmented because. In nomadic society. Which of the following was not a major technological innovation of Ta
What is the pH of a solution made by titrating 30.0 mL of 0.10M acetic acid with 30.0 mL of 0.10 M KOH? Assume that the volumes of the solutions are additive.
Struck from behind, a 950-kg stopped car accelerates from rest to 40km/h in 75 ms, What horizontal force on the head would accelerate it along with the rest of the body
Which of the following elements would you expect to gain electrons in chemical changes
What is the solubility of calcium fluoride in a solution that contains 0.015 M calcium chloride? Note calcium chloride is completely soluble in water.
What is the minimum work needed to push a 800 -kg car 860m up along a 9.0 degree incline
Why do carboxylic acids (-COOH) compounds have higher boiling points than simple alkanes of the same molecular weight
A point charge is a = 1.5 m below the end of a continuously charged rod with charge Q = 5 ?C, Write an expression for the differential element of the y component of the Electric Field at P in terms of
A buffer is perpared by adding 0.100 moles of sodium acetate to 0.100 moles of acetic acid and diluting to 1.00L. What is the pH of the solution after the addition of 5.00mL of 1.00 molar HCl
A hollow non-conducting spherical shell has inner radius R1 = 8 cm and outer radius R2 = 15 cm. a) Write an equation for the radial electric field in the region r < R1 in terms of Q, r, and Coulomb
My assignment is to write a 18 page paper discussing the significance of European maritime exploration and expansion, the Enlightenment, the Industrial Revolution and Nationalism in shaping the mode
Why do you think most of the Mongolian laws made by Genghis Khan were based on his real life experiences? For example, "he forbade the kidnapping of women, almost certainly a reaction to the kidn
Acetylene (C2H2) can be produced from the reaction of calcium carbide (CaC2) with water. Draw the localized electron orbital model (hybridized orbital model) for the acetylide anion (C22-), showing
A 250 kV power transmission line carrying 500 A is hung from grounded metal towers by ceramic insulators, What fraction of the power carried by the line is this
What type of orgainc compound is responsible for the fruity flavorings found in many natural substances
Discuss the concept of humanism as evidenced in the philosophy, religion,government, laws and art of the cultures of China, India, Persia, Greece and Rome