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CaC2(s) + 2H2O(l) = C2H2(g) + Ca(OH)2(aq) . If 48 g of CaC2 are consumed in this reaction, how much H2O is needed?
A steel ball of mass 0.400 kg is fastened to a cord 75.0 cm long and fixed at the far end. It is released when the cord is horizontal. At the bottom of its path, the ball strikes a 3.80 kg steel blo
A.) What is the potential energy of the third charge if it is placed at x= 10.00cm. B) Where should the third charge be place to make it's potential energy 0?
Calculate the change in one day, given that the rotational period of 24.0 h decreases by about 11 µs each year. (Let 1 yr = 365 d).
A 3.0-m-long rigid beam with a mass 130 is supported at each end. An 75 student stands 2.0 from support 1. How much upward force does support 1 exert on the beam?
The specific heat of mercury is 138 J/kg Co Determine the latent heat of fusion of mercury using the following calorimeter data: 1.00 kg of solid Hg at its melting point of -39.0º C is placed
Densit gold is 19.31 g/cm3 and density of platinum is 21.43 g/cm3 if equal masses of gold and platinum are transferred to equal volumes of water in separate graduated cylinders which graduated cylin
If the ball is in contact with the player's head for 6.7 {rm ms}, what is the direction of the impulse delivered to the ball?
IP A uniform electric field of magnitude 6.00 times 10^3 ;{rm{N/C}} points upward. An empty, closed shoe box has a top and bottom that are 37.0 cm by 28.0 cm, vertical ends that are 28.0 cm by 21.0
A 3.05 kg object is moving in a plane, with its x and y coordinates given by x = 5t2 - 3 and y = 4t3 + 2, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting
What is the horizontal distance x to the base of the wall supporting the mirror of the nearest point on the floor that can be seen reflected in the mirror?
What is the limiting reagent in the reduction of camphor with sodium borohydride assuming you start with .1 g of camphor and .1 g of sodium borohydride?
A child exerts a tangential 37.2 {N} force on the rim of a disk-shaped merry-go-round with a radius of 2.40 {m}.If the merry-go-round starts at rest and acquires an angular speed of 0.0900 {rev/s} i
Suppose that all the energy from a 150-watt light bulb came in the form of photons with wavelength 600. Calculate the energy of a single photon with wavelength 600nm.
The original volume [before the 0.406 mole C(g) begins to decompose] is 10.00 L. What is the volume in the cylinder at equilibrium?
A uniform disk turns at 3.8 around a frictionless spindle. A nonrotating rod, of the same mass as the disk and length equal to the disk's diameter, is dropped onto the freely spinning disk. They th
An outfielder throws a 0.150 kg baseball at a speed of 56.0 m/s and an initial angle of 30.0°. What is the kinetic energy of the ball at the highest point of its motion?
A sample of impure sulphide contains 42.34% of Zn. Find the percentage of pure ZnS in the sample .
Sam, whose mass is 78.0 kg, takes off down a 52.0 m high, 8.00^circ slope on his jet-powered skis. The skis have a thrust of 220 N. Sam's speed at the bottom is 45.0 {rm m/s}. What is the coefficie
For the nitrogen fixation reaction 3H2(g) + N2(g) <--> 2NH3(g), Kc = 6.0 × 10-2 at 500°C. If 0.250 M H2 and 0.050 M NH3 are present at equilibrium, what is the equilibrium concentrat
A student has two ramps, both of which are at an angle 34°. Ramp 1 is frictionless and ramp 2 has friction. The student also has two blocks, one for each ramp. She pushes the blocks up the ramps
How much heat is required to melt 11 percent of a 3.20×105 metric-ton iceberg? One metric ton is equal to 103 kg. Assume that the iceberg is at 0°C.
A sample of H2O with a mass of 46.0 grams has a temperature of -58.0 C How many Joules of energy are necessary to heat the ice to 0 C ( Use 2.1 J/g C for the specific heat of ice).
using your knowledge of mole calculations and unit conversions determine how many atoms there are in 1 gallon. Assume that the molecular formula for gasoline is C6H14 and that the density of gasolin
A thin 2.5kg box rests on a 5.5kg board that hangs over the end of a table. The portion of the board on the table measures .30m and the portion of the table measures .20m. How far can the center of