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Consider a swinging pendulum with length l= 10 cm, a mass of 1 gm swinging at the end of it with an amplitude, Calculate the total energy ( potential plus kinetic) in ergs of the swinging pendulu
Compare the electron-dot of CH4 and H2O. Why do these molecules have similar bond angels but different names for their shapes
In a molecule of H2S, the four electron groups around the sulfur atom are arranged in tetrahedral geometry. However, the shape of the molecule is bent. Why does the shape of the molecule have a diff
A 1248.0 g mass is on a horizontal surface with ?k = 0.36, and is in contact with a massless spring with a force constant of 790.0 N/m which is compressed, What is the velocity of the mass as it los
A bicycle wheel is rotating at 40rpm when the cyclist begins to pedal harder, giving the wheel a constant angular acceleration of 0.45rad/s2, What is the wheel's angular velocity, in rpm, 10s later
according to le chateliers principle, what is the effect on the products when N2 is added to the equilibrium mixture of each of the following reactions? a)2NH3(g)<>3H2(g)+N2(g). b)N2(g)+O2(g)&
The equilibrium constant for the following reaction is .20 at 100 degrees C. if an equilibrium mixture contains solid carbon, [H2O]=.40 M, and [CO]=.40 M,what is the [H2]? C(s)+H2O(g)<>CO(g)+H
Consider the reaction 2SO2(g)+O2(g)<>2SO3(g). a) write the equilibrium constant expression for Kc. b) what is the Kc for the reaction if at equilibrium the concentrations are [SO2]=.10 M, [O2]
Two lens system: The original object is 20 cm to the left of a lens with a focal length of +10 cm, Find the location and magnification of the final image. Be sure to show or tell me from where you ar
write the balanced chemical equation for each of the following equilibrium constant expressions: a)Kc=[CO2][H2]/[CO][H2O. b)Kc=[H2][F2]/[HF]^2. c)Kc=[O2][HCl]^4/[Cl2]^2[H2O]^2. d)Kc=[CS2][H2]^4/[Ch
A stick is resting on a concrete step with 1/4 of its length hanging over the edge. what is the magnitude of the angular acceleration of the stick at the instant shown
For each of the following reactions at equilibrium indicate if the equilibrium mixture contains mostly products mostly reactants or both products and reactants: a)2H2O(g)<>2H2(g)+O2(g) Kc=4x10
The magnetic field over a certain range is given by B= Bxi + Byj where Bx= 6T and By= 4T. What is the j component of the force
consider the following reaction at equilibrium: N2(g)+O2(g)+heat<>2NO(g). indicate how each of the following will shift the equilibrium: a)raising the temperature of the reaction. b)decreasin
Draw resonance structures for each of the following molecules or ions: a) HCO2^- (C is the central atom); b) N2O (N N O).
The Cosmoclock 21 Ferris wheel in Yokohama City, Japan, has a diameter of 100 m, Find the speed of the passengers when the Ferris wheel is rotating at this rate
Draw the electron-dot formula for each of the following molecules or ions: a) HCCH (ethyne); b) CS2 (C is the central atom); c) NO^+
A gardener pushes a box of tools across a driveway by applying a 22.5- N force that pushes downward at an angle of 23.1 o, How much work is done if the box moves 2.55 m in the horizontal direction
If the available valence electrons for a molecule or polyatomic ion does not complete all of the octets in an electron-dot formula, what should you do
Draw the electron dot formula for each of the following molecules or ions: a) H2O; b) CCl4; c) H3O^+; d) SiF4; e) CF2Cl2; f) C2H6 HH
When a 50.0-V emf device is placed across two resistors in series, a current of 12.0 A is flowing in each of the resistors. What is the magnitude of the larger of the two resistances
A series RCL circuit driven at angular frequency w = 780 rad/s has a capacitive reactance XC = 920 ohms, What is the average power consumption of the circuit
173.3 g of NaCl completely dissolves (producting NA+ and Cl- ions) in 1.00 kg of water at 25.0 degrees celcius. the vapor pressure of pure water at this temperature is 23.8 torr. Determine the vapor
A certain ac signal at 1000 Hz is applied across an inductor and a 100-ohm resistor. If the power factor of the circuit is 0.4, what is the impedance of the circuit
Determine the total number of valence electrons in each of the following: a) SBr2; b)NBr3; c) CH3OH; d) NH4^+.