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How did Rutherford interpret the following observations made during his a-particle scattering experiments?
(a) Most a particles were not appreciably deflected as they passed through the gold foil.
(b) A few a particles were deflected at very large angles.
(c) What differences would you expect if beryllium foil were used instead of gold foil in a the scattering experiment?
The heat of combustion of bituminous coal is 2.5 × 104 J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C
What is the molar mass if a 0.550-g sample occupies 258mL at a pressure of 744 torr and a temperature of 22 degrees C
Which of the following is the strongest reducing agent Sn^(2+) (aq) + 2e- --> Sn(s) E= -0.14V
A certain metal has a density of 10.2 g/cm3 at 25C. it crystallizes in a body-centered cubic arrangement with a unit cell edge length of 314.7 pm. determine the atomic weight.
Explain what is the concentration Molarity of a base solution containing .235g NaOH in 500.0 ml of total solution
After 74.0 min, 35.0% of a compound has decomposed. Explain what is the half-life of this reaction assuming first-order kinetics
what are the balanced molecular equations for all of the chemical reactions involved in the copper cycle experiment? There are eight of them.
Neglect the absorption of other waste gas components into the water, and the evaporation of water into the waste gas stream. What rate is NH3 is being removed from the feed gas? mol/hr
If you start with 2 cubes of ice, each with a mass of 25.0g and at a temperature of -10C, and 25.0ml of water with a temperature of 100C, what will the final temperature of the mixture be? Assume fina l state is liquid water for all species.
The steam is then sent back to the boiler (constant pressure heat exchanger) and reheated to 300oC. In a secondary turbine, the steam is expanded to 10kPa.
One of the more common agents for standardizing solutions of potassium hydroxide (KOH) is potassium acid phtalate (KHC8H4O4), or, more accurately, potassium hydrogen phthalate.
The combustion of what volume of ethane C2H6, measured at 23 degrees celcius and 752 mmHG, would be required to heat 855g of water from 25 degrees celcius to 95 degrees celcius. The heat of combustion per mole of ethane is -84.7 kj/mol.
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