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Find the neergy of a photon of ultraviolet light whose frequency is 2 x 10^16 Hz. Do the same for the photon of radio waves whose frequency is 2 x 10^5 Hz.
calculate the activation energy for a reaction if its rate constant increases from 10 to 45 s as the temperature increases from 298 to 315 k .
The total mass of pure metals produced = 0.4684 grams. compute the mass percent of CuCl2, and AgNO3, FeCl3 in the original mixture.
Then draw the substitution product formed when this enantiomer reacts with NaCN in DMSO, and indicate the stereochemistry of the product.
The bottle is then brought outside and stored at 0.0°C. (a) What mass of liquid water condenses inside the bottle?
The heat of neutralization of HCl by NaOH is H°rxn = -56.2 kJ/mol. How much heat is released when 125 mL of 1.750 M HCl is mixed with 195 mL of 0.667 M NaOH.
A gaseous mixture of O2 and Kr has a density of 1.111 g/L at 420. torr and 300. K. What is the mole percent O2 in the mixture?
suppose you titrate a 25 ml sample of vinegar with 17.62 ml of a standardized 0.1045 N solution of NaOH. what is the molarity of acetic acid in this vinegar?
You are asked to prepare 150 mL of a 0.059 M solution of silver nitrate. How many grams of silver nitrate do you need to weigh out.
A 3.00 L helium balloon, initially at STP, floats up to an altitude of 10 km, where the pressure is 200.0 torr and the temperature is -45°C. What is the balloon's new volume?
The mass of an average blueberry is 0.72 g and the mass of an automobile is 1900 kg. Find the number of automobiles whose total mass is the same as 1.0 {rm mol} blueberries.
Determine the molarity of a saturated NaI Sodium iodide solution (aqueous) formed as twenty five degree Celsius
A 26.0-g sample of ice at -11.0°C is mixed with 123.0 g of water at 90.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
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