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Calculate change in heat when 18.80 g of water vapor steam at 100 C condenses to liquid water and then cools to 20.5. the molar heat capacity of water is 75.3 J/ (mol x C). Delta Hvap= 40.67 KJ/mol. Express answer using 4 significant figures. Also, should your answer be positive or negative?
structures of all cycloalkenes that yield n-propyl cyclopentane when subjected to catalytic hydrogenation
How much heat was transferred from the tank? b) What is the final temperature of the tank contents? c) How much steam condensed, in kg? for a i found the difference in enthalpies but i cant figure out b, c
Draw the acylation mechanism including all resonance forms of an electrophile aromatic substitution reaction if the carbon identified with an asterisk(*)
A space probe identifies a new element in a sample collected from an asteroid. Successive ionization energies (in attojoules per atom) for the new element are l1 = 0.507, l2 = 1.017, l3 = 4.108, l4 = 5.074, l5 = 6.147 l6 = 7.903, l7 = 8.294. To wh..
Write balanced net ionic equation for the reaction between hydrobromic acid and potassium hydroxide.
a) How many moles of water form when 5.00L of propane gas completely reacts? b) How many grams of CO2 are produced from 18.5 g of oxygen gas and excess propane? c) How many grams of H2O can be produced from the reaction of 8.50*10^22 molecules of ..
Suppose four weighings of a crcucible were found to be 10.231 g, 10.278 g, 10.256 g, and 10.363. Obtain the average (mean) weight of the crucible
What is the minimum frequency of light necessary to emit electrons from sodium via the photoelectric effect? What is the wavelength of this light?
What will be the new freezing point of a solution made from 30.0g of a nonelectrolyte solute and 400g of water? ( the molar mass of the solute is 72.0g)
Suppose you were asked to carry out an aldol condensation reaction between benzaldehyde and 5-methylhexanal,
A number of reaction mixtures did not become colorless within five minutes after the addition of bromine in acetic acid. Those solutions were put in a dark place and examined after one hour
Write the ground-state electron configurations for the following elements. (Type your answer in noble gas notation using the format [Ar] 4s2 3d10 4p2 for [Ar]4s23d104p2.)
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