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a gasous mixture of oxygen and nitrogen contains 32.8% nitrogen by mass. what is the partial pressure of oxygen in the mixture if the total pressure is 405mmHG?
A block of aluminum with a volume of 98.5cm^3 absorbs 68.4J of heat. If its initial temperature was 31.9 degrees celsius, what is its final temperature
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 .
How many moles of phosphine (PH3) are produced for every 4.0 moles of hydrogen that react according to the chemical equation below?.
If 138 mL of wet H2 is collected over water at 24°C and a barometric pressure of 748 torr, how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 torr at 24°C.)
How much heat energy, in kilojoules, is required to convert 58.0 g of ice at -18.0 *C to water at 25.0 *C ?
What is the pH of a solution that is 0.10 M CH3NH2 (methylamine) and 0.15 M methylammonium chloride
Some KCl is dissolved in water at 25 degree Celsius, where it completely dissociates. The vapor pressure of pure water at 25 degree celsius is 28.3 mmHg.
You are expected to design a car that works with photovoltaic panels. Assume that the driver is 75kg and the expected speed is 50km/hr.
A chemist wanted to determine the concentration of a solution of lactic acid, HC3H5O3. She found that the pH of the solution was 2.59. What was the concentration of the solution.
KCL,KCLO3, and MnO2 having a total wight of 23.584 was jeated tp decompose the KCLO3. After heating, the mass was found to be 22.347g. how many moles of oxygen gas was evolved.
The product formed is 2-hexanol, is this an example of 1,4 addition, or proceeds via a carbanion, or is an example of electrophillic addition, or results in sp2 hybridized carbon being transformed into a sp hybridized carbon?
Draw the structures of the compounds listed below in groups of isomers and classify them according to their unique functional groups and number of carbons atoms
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