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giving that water has a molar enthlphy of vaporization of 40.79 kJ/mol, how many grams of water could be vaporized by 623 J
The bottom of a box has a surface area of 25.0 cm2. The mass of the box is 34.0 kilograms. Acceleration due to gravity at sea level is 9.80 m/s2. What pressure is exerted by the box where it rests?
Combustion reaction, A fuel has the following weight percentage composition, C = 52%, H = 11%, S = 0%, O = 9%, moisture = 13%, Ash = 15%
How many grams of sodium ion Na+ are in 2.50 g toothpaste. A toothpaste contains 0.24 by mass sodium fluoride used to prevent dental caries and 0.30 by mass triclosan , a preservative and antigingivitis agent
NH3(Ammonia ) is widely used in many household cleaners and as a fertilizer. Calculate How much ammonia (in units of mol) is produced when 7.8 mol of H gas react with an excess of N gas.
Ethanol is a common laboratory solvent and has a density of 0.789 g/mL. What is the mass, in grams, of 143 mL of ethanol.
Consider the base monosodium phosphate and Write the structure of the conjugate acid of this base- ineffective for extracting C7H6O2 from a diethyl ether solution.
The half-life for the second order reaction of a substance A is 55 seconds when [A]o is 0.84 M. What time is needed for the concentration to decrease to 1/4 of the original value.
How would I list the following aldehydes in terms of increasing reactivity ClCH2CHO, CH3CHO, Cl3CCHO, and Cl2CHCHO?
How many moles contain each of the following? 3.75 x 10^24 molecules CO2
Description of Intermolecular forces, What parts of the calcium chloride are attracted to what parts of the water molecule when calcium chloride dissolves
What is the pH of a buffer that consists of 0.45 M CH3COOH and 0.35 M CH3COONa? Ka = 1.8 × 10-5
A sample of nitrogen occupies a volume of 546 mL at STP.What volume would nitrogen occupy at 177C under a pressure of 380 torr?
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