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A horizontal ray of white light incident perpendicularly on the vertical face of a prism made of crown glass. The ray enters the prism, and part of the light undergoes refraction at the slanted face
A charge of +9q is fixed to one corner of a square, while a charge of -6q is fixed to the diagonally opposite corner. Expressed in terms of q, what charge should be fixed to the center of the square
mixture of 100 mol containing 50 mol % n-pentane and 50 mol % n-heptane is distilled under differential conditions at 101.2 kPa until 40 mol is distilled. What is the average composition of the tota
Calculate the energy in joules and calories lost when 10.0 {rm g} ethanol, {rm C_2H_5OH}, cools from 62.5^circ C to -46.0^circ C
Calculate the theoretical yield of C2H5Cl when 124 g of C2H6 reacts with 219 g of Cl2 , assuming that C2H6 and Cl2 react only to form C2H5Cl and HCl
What fact allows the separation of iron and aluminum from nickel and cobalt? What fact allows for the separation of iron from aluminum?
what is the freezing point of a solution of 1.17g of 1- naphthol, C10H8O dissolved in 2ml benzene at 20 degree centigrade? the density of benzene at 20 degree centigrade is 0.876g/mole. Kf for benze
Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas are formed when 48.7 g of sodium are added to water? 2Na+2H2O-->2N
How much heat is required to warm 229 g of ice from -44.9C to 0.0C, melt the ice, warm the water from 0.0C to 100.0C, boil the water, and heat the steam to 173.0C?
What is the molarity of a NaOH solution if 28.2 mL of a 0.112 M H2SO4 solution is required to neutralize a 25.0-mL sample of the NaOH solution?
144 g of ethanol, C H OH, and 96.0 g of water are mixed giving 269.4 mL of a solution with density of 0.891 g/mL. The water is considered to be the solvent. What is the molarity (M) of ethanol in th
A student (m = 66 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.04 s. The average force exerted on him by the ground is +18
Given that the solubility of an inorganic acid, Y, in water is about a quarter of its solubility in ether, calculate the weight of the acid in each layer at equilibrium after first extraction of 3.
Write a balanced equation for the reaction between the following. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.) aluminum and sulfuric acid.
One mole of air at 350 K confined in a cylinder under a heavy piston occupies a volume of 6.1 L. The heat capacity of air under constant volume is (5/2)R. Find the new volume of the gas if 3.9 kJ i
Measurements show that unknown compound X has the following composition: Write the empirical chemical formula of X
At the end of the firing period, the craft has velocity components of vx = 3835 m/s and vy = 4748 m/s. Find the magnitude and direction of the initial velocity. Express the direction as an angle wit
The Henry's Law constant of methyl bromide, CH3 Br, is k = 0 .159 mol/(L a tm) at 25C. What is the solubility of methyl bromide in water at 25 C and at a partial pressure of 250 mm Hg
What mass of magnesium chloride is needed to react with 145 g of silber nitrate accourding to the following reaction: MgCL2(aq)+2AgNO3(aq) -> MG(NO3)2(aq) + 2AgCL
A 55.0 kg girl weighs herself by standing on a scale in an elevator. What is the force exerted by the scale when the elevator is descending at a constant speed of 10 m/s?
If 100ml of NaCl is added to 200ml of solution containing 0.005M AgNO3 and 0.10M Pb(NO)3 does a precipitate form? If one forms, what compound(s) does this solution contain?
What volume of N2 gas (measured at STP) would result from the reaction of 1500 kg of hydrazine and 1000 kg of N2O4?
Calculate the pH of a buffer solution with .10 moles of C2H5COOH and .13 moles of C2H5COONa in 1.5L
A rifle with a barrel length of 56cm fires a 12g bullet with a horizontal speed of 350m/s . The bullet strikes a block of wood and penetrates to a depth of 10cm. what force does the block put on the
A pure gas sample at room temperature (25 C) has an average molecular speed of 682 m/s. What is the identity of the gas?