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The 1.45 g sample of phosphorus burns in the air and outlines the 2.57 g of a phosphorus oxide. Describe the empirical formula of the oxide. Express your answer in detail as a chemical formula.
The bridge is to be built in shape of the semielliptical arch and is to have the span of 100 feet. Height of arch, at the distance of 40 feet from center, is to be 10 feet. Determine height of arch
Determine the numbers of calcium are needed to react with the 1.55g of water to make the calcium hydroxide and the hydrogen gas?
The electric field within a conducting metal car is zero. When the car is negatively charged by lightning, the electric field within the car is then
Determine the number of moles in 75.5g ofAl2O3, Determine the mass in grams of one molecule of CBr4
The electrical force on the pair of charges is 60 N. If those similar charges are moved such that the new force among them is 15 N, determine the new distance among the charges?
The 1.912-g sample of calcium chloride is decomposed into its ingredient elements and found to contain 0.690 g Ca and 1.222 g Cl. Describe the mass percent composition of Ca and Cl in the calcium c
Reflector of the flashlight is in shape of the paraboloid of revolution. Its diameter is 4 inches and its depth is 1 inch. How far from vertex must light bulb be placed so that rays will be reflect
Determine the numbers of grams of water are produced when the 17.5 g of oxygen reacts with the nitrogen? Explain in detail.
75.0 mL of 0.355 M hydrochloric acid is added to 25.0 mL of 0.298 M MgCl2 . Determine the concentration of chloride ion in the final solution?
Determine at what mass of lithium phosphate is required to prepare the 575 mL of a solution which is having a lithium ion concentration of 0.250 M?
Combustion analysis of a 25.70mg sample of an organic compound containing only C, H, and N yielded 71.49mg of carbon dioxide and 14.64mg of water. Calculate the mass percentage of nitrogen in organi
The three similar 50-kg masses are held at the corners of the equilateral triangle, 30 cm on each side. When one of the masses is liberated, determine its initial acceleration, if the mere forces ac
There are 6.02 x 1023atoms of mercury in 201grams of mercury. Let the density of mercury is 13.5 g/mL. Determine the volume in μm3, which is occupied by one mercury atom?
If c represents a constant force, find the work done if the point of the application of c moves along the line segment from P to Q. c=2j+6j P(0,0), Q(-3,3).
The spherical shell of inner diameter R and outer diameter 3R consist of a uniform density e. Determine the magnitude of the gravitational acceleration a distance 2R from the center of the spherical
Solve: from 10 names on the ballot, the committee of 3 will be elected to attend the political national convention. Find how many different committees are feasible?
The electric field is produced by a charge imbalance and the field is expressed by the Coulomb's Law. Find the value (and UNITS) of the proportionality constant in the Coulomb's Law?
The change in the animal's velocity takes 1.9 s. (Employ east as the positive direction.) (a) Determine its acceleration from the prespective of the cameraman?
Find all complex cube roots of z=8, write each root in rectangle form. If u=6i+j and v=10i+j, find the magnitude of u+v.
The car is traveling at 31 mph. If its tires have the diameter of 24 inches, how fast are car's tires turning? Write answer in revolutions per minute.
The edges of a cube include of equal resistors of resistance R, which are connected at the corners. Let a battery be joined to two opposite corners of a face of the cube. Determine the effective res
(a) Determine the diameter of the image of Jupiter generated by the objective lens. (b) Determine the angular size of Jupiter as viewed through the eyepieces. (c) Determine how far must I place a ma
Snow is falling vertically at a constant speed of 6.5 m/s. Determine at what angle from the vertical do the snow-flakes appear to be falling as viewed by the driver of a car traveling on the straigh
The company manufactures 3 color tv sets, models X,Y, and Z. How many of each model must be produced every week if all available time should be utilized?