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Its composition is 17.01% Na, 47.46% S and 35.52% O by mass. Determine its empirical formula. If the Molar mass of sodium tetrathionate is 272. What is its actual formula? Na2S2O3 + I = NaxSx + 2Nal
The reaction 4PH3(g) -> P4(g) + 6H2(g) is found to be first order in PH3 with a rate constant of 1.6*10^-2 sec^-1 at 650 C. a)Give the rate law (rate equation) for the reaction and explicitly sta
Identify which of the following solutions may act as buffers by placing a check in the box next to the mixture. A. HNO3 , NaNO3 D. H2SO4, NaHSO4
An object with a height of 5cm is placed in front of a concave mirror that has a focal length of 12cm. where should the object be placed
A 0.0989 g sample of an alcohol is burn in oxygen to yield 0.2160 g Co2 and 0.1194 g H2o. Calculate the mass percentage of C, H, and O in the compound
Explain the physics fundamental process that causes the scope ,rod, pith ball, etc to discharge when you touch it. what is conservative force according to the text book of Giancoli
Write a balanced hydrolysis equation to show why solutions of aluminum chloride are acidic. (Hint; Al3+(aq) ions can be written Al(H2O)63+(aq).)
A 750g aluminum pan is removed from the stove and plunged into a sink filled with 10.0kg of water at 20.0C. What was the initial temperature of the pan
Calculate the theoretical wavelength in nanometers of the light absorbed when an electron in a hydrogen atom makes a electron transition from level n=2 to n=7 (notated as "2==>7").
A child applies a torque of 1200 N*M to a merry go round. The rotational interia of the merry go round is 900 kg*m 2. What is the net torque acting on the merry go round
The flask was then shaken until the solution was uniform. A 30.0-\rm mL sample of this glucose solution was diluted to 0.500 \rm L. How many grams of glucose are in 100. \rm mL of the final solution
A garden hose is attached to a water faucet on one end and a spray nozzle on the other end. Find the gauge pressure of the water
A solution is made by combining 15.0mL of 16.5M acetic acid with 5.52g of sodium acetate and diluting to a volume of 1.50L
A water pipe having a 2.2 cm inside diameter carries water into the basement of a house at a speed of 0.85 m/s, What is the water pressure at the second floor
How many spectra must be averaged in order to increase the signal-to-noise ratio of a spectrum from 7/1 to 20/1? i took 20/7 and squared
The mass of a bottom quark is \(4.2 GeV/c^{2}\), What was the energy of the proton beam and how fast were they moving
Which of the following expressions is not equivalent to pH? a. log 1/[H+(aq)] b. 14.0-pOH c. -log [H+(aq)] d. -log Kw/[OH-] e
Water is being pumped through a horizontal pipe that is 28.8 m long and 17.0 cm in diameter. what gauge pressure must the pump provide to give the same volume flow rate as for the first pipe
A gas absorbs 0.0j of heat and then performs 35.6j of works. the change in interval energy of the gas is
A 75-kg man is riding in a 75-kg cart at 1.0 m/s. He jumps off in such a way as to land on the ground with no horizontal velocity
A Researcher reads directions that call for addition of 25.0 mL of anhydrous ethanol (ethyl alcohol). From among the bottles in the lab, which one should she select
A 3.00-g bullet traveling horizontally at 413 m/s hits a 28.0-g wooden block, compute The speed of the block after the collision
A candle is held 6.0 cm from the surface of a reflecting ball, and its image appears three-quarters of its actual size. What is the diameter of the ball
a) Assuming ideal behavior, what is the solubility of AgCl(s) in 1.00 x 10-4 M NaCl if only Ksp is considered? (b) What is the solubility AgCl(s) if all 4 equilibria are considered for the 1.00 x 10
An ideal spring is used to fire a 15.0-g block horizontally. The spring has a spring constant of 40 N/m, The kinetic energy of the pellet as it leaves the spring is