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10g of CH4 is combusted in a calorimeter that has an empty heat capacity of 18 J/C. The calorimeter contained 150 g of water. If the temperature changed from 25.2C to 30.3C. Calculate the molar heat
A string with a length of 3.0 m has two adjacent resonances at frequencies 112 Hz and 140 Hz. What is the wavelength of the first harmonic
The distance between successive crests of a sound wave is 33m. what is the approximate frequency of the sound wave
Given pKa (acetylene) = 25 and pKa (H2) = 35, predict whether the direction/ position of equilibrium in the following reaction will lie to the right (favors the forward reaction) or to the left (fav
what happens to speed of sound in air if you quadruple the temperatur of the air, How many times larger does it become
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 Calculate the pH
The current through a 908 ohm resistor is 189 mA; to the nearest volt, what is the potential difference across the resistor
A box of bananas weighinh 40 N rests on a horizontal surface. The coefficient of static friction between the box, the magnitude of the frictional force is
For the reaction N2O4(g) <--> (equilibrium arrows) 2NO2(g), kp = 0.25 at a certain temperature. Calculate the equilibrium pressures of NO2(g) and N2SO4(g) if the initial pressures of the compo
0.12g of compound "Y" dissolves in 10ml of acetone @ 25 deg C and 0.85g of the same compound dissolves in 10 ml of boiling acetone. If 5g of compound "Y" were to be recrystallized from 75 ml acetone
Radical formed by H-abstraction from diethyl ether. Showing curved arrows to where it goes.
A charged particle of mass m and charge q is suspended from a light thread in a region of space where there is a uniform horizontal electric field. find the angle between the thread and a vertical l
Given that the initial rate constant is 0.0130s^-1 at an initial temperature of 20 degree celcius , what would the rate constant be at a temperature of 100 degree celcius
A light-rail train going from one station to the next on a straight section of track accelerates from rest at 2.37 m/s2 for 15.9 s. What is the distance between the stations
Tin carbonate solid is treated with nitric acid to dissolve tin carbonate to give tin nitrate, water and carbon dioxide. a) Write a balanced equation for the reaction.
A concrete highway is built of slabs 14m long (20 degrees Celsius). How wide should the expansion cracks between the slabs be
Epsom salt is a hydrate with a formula MgsO4.xH2O, where x indicates the number of moles of H2O per mole of MgSO4. After a 1.687 g sample of the hydrate is heated, 0.824 of MgSO4 remains. How many m
The activation energy of a certain reaction is 44.8 kj/mol. At 20 degree celcius , the rate constant is0.0130s^-1 . At what temperature would this reaction go twice as fast
An iron tower in is 307 meters tall on a cold day (T = -8.3 degrees Celsius). What is its height of the tower on a hot day
Write balanced equation for the following reaction of aqueous of feCl3, and Mg3(po4)2 to give FePo4 and MgCl2. Molecular Equation. Ionic Equation. Net ionic equation. What the name of this type of r
A submarine dives to a depth of 333 feet in the ocean. What is the force (in pounds) acting on a hatch that has an area of 4 square feet
An object falls off of a pier and into the ocean (sea water) where it displaces a total volume of 3.7 cubic meters of sea water
When Adding H2so4 to form alkene from alcohol what is the solvent used? is it just heat. What about when forming alkene from alkyl halide and NaOMe is used to form Zaitsev is the solvent MeOH. and w
what this pH should be. A. 0.10 M phosphoric acid (H3PO4) B. 0.10 M sodium dihydrogen phosphate (NaH2PO4; the monobasic salt which contains H2PO4-ions) C. 0.10 M sodium hydrogen phosphate (Na2HPO4
307g of an unknown mineral is heated to 98.7 C and placed into a calorimeter that contains 72.4 g of water at 23.6C. the heat capacity of the empty calorimeter was 15.7 J/K. the final temperature of