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The standard molar entropy for Br2(g) is 245.46 J/(molK) at 25?C. Given that ?S? = 104.58 J/K for the dissociation of one mole of Br2(g) into Br(g) at 25?C, find the standard molar entropy for Br(g) at 25?C.
An aqueous solution of Na2CO3 has a pH of 10.00. The CO3-2 (carbonate anion) is the conjugate base of its conjugate acid, HCO3- (bicarbonate anion). Write the net ionic equation for the reaction which shows why the solution has a basic pH.
The heaviest known isotope of hydrogen is called tritium, 3/1 H. It decays by beta emission, and half-life of 12.3 years. What fraction of a tritium sample will remain after 5.20 years
The density of an unknown gas is 4.00 grams per liter at 4.00 atmospheres pressure and 127 degrees C. What is the molecular weight of the gas?
Calculate the pH after 0.10 mol of HCl has been added to the original solution. Assume no volume change on addition of HCl
The rate constant for the second- order reaction.starting with a concentration of 0.86m, calculate the concentration of NOBr after 57s.
Describe the preparation of 1.5 liters of a 0.1 M acetate buffer, pH 5.0, starting from solid sodium acetate trihydrate
Calculate the mass percent of carbon in the compound and calculate What is its final temperature
Given a four-carbon chain with two methyl groups and an NH2 group on the fourth carbon and a C=O double bond and an H on the first carbon. It asks me to draw the product of the reaction of this molecule with H3O+ (cat.) and Delta toluene.
1 tums tablet is 1.3g which has .5g of calcium carbonate, how many moles of calcium carbonate are in one tums tablet? From that value, calculate the number of moles of HCI that two TUMS tablers can neutralize
The free radical bromination of ethane includes all of the following in the reaction mechanism EXCEPT
Determine the [H3O+] and pH of each of the following solutions at about room temperature. Be certain to show the chemistry behind each problem.
Inexperienced athletes might try consuming three high energy drinks just before a race but veteran marathon runners know this would impair their performance. Why?
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