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Calculate the wavelength of the photon emitted when an electron makes a transition from n=4 to n=3.
CH4 + 2 O2-> CO2 + 2 H2O How many grams of CO2 are formed from the combustion of 9.00 moles of methane, CH4, in oxygen?
What is the boiling point of a solution made using 773 g of sucrose, C12H22O11, in 0.275 kg of water,H2O?
What are the equilibrium partial pressure of H2 when equilibrium is reestablished following the addition of 0.200 mol of HI?
How do you calculate the rate of change of absorbance per minute over the first 3 minutes to get units, U/ml, total units and percent recovery?
An unknown mass of each of the given substances as with The final temperature is recorded as indicated 1.Pyrex glass (tf=67.6 C), 2.Sand (tf=70.4 C), 3.ethanol (tf=45.9 C), initially at 19.0 degrees celsius, absorbs 1930 Joules of heat
determine the pressure in a 125-L tank containing 56.2 kg of oxygen gas at 21.0 oC
The enthalpy of formation of ethanol, C2H5OH, is 277.o kJ/mol at 298.15K. Calculate the enthalpy of combustion of one mole of ethanol, assuming that the products are CO2 and H2O.
For many compounds, it is possible to draw multiple Lewis dot structures that are simplifications of the structure of the true molecule. The actual structure of the molecule
To what temperature must the specimen be heated and how much Sn should be mixed to the 1.5-kilograms specimen at the temperature of twenty five degree celsius to achieve this state?
the Na formed during the breakdown of NaN3 reacts with Fe2O3. How many grams of Fe2O3 are needed to react with 35.3 g Na?
If the total mass of H2O produced is 23.4 grams, what was the approximate mass of the methane in the original mixture?
In Europe, gasoline efficiency is measured in km/L . If your car's gas mileage is 30.0 miles/gal, how many liters of gasoline would you need to buy to complete a 284- km trip in Europe?
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