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A.E. Dyer supplied 45.9 cal of heat energy to a 156-g piece of aluminum block that was kept at 28 degree C. What is the final temperature of the aluminum block?
For the equilibrium H2(g)+ CO2 (g) H20 (g) + CO(g) Kc = 3.18 at 1106K. If each of the four species was initially present at a concentration of 3.000M, calculate the equilibrium concentration of the CO(g) at this temperature
for a certain change, the value of change in U is -2.37kJ. during the change the system absorbs 650 joules. how much work did the system do?
A compound of a transition metal and iodine is 65.1% metal by mass. How many grams of iodine is present in 859 g of this compound?
Explain briefly that how HCl could test for limestone's presence , use the balanced chemical equation for this and then describe specific reaction that takes place?
Show your work in finding the mass of the nitrogen collected, The original sample, which decomposed to produce the nitrogen gas, weighed 0.1198 g. Find the percent nitrogen in the sample
How many L of H2 gas (at STP) is produced from 470 mL of 0.36 M HCl and excess Zn? The reaction is: Zn + 2HCl = ZnCl2 + H2
Calculate the equilibrium concentration of H3O+ in the solution if the initial concentration of C6H5COOH is 7.0×10?2 .
a sample contains both KBr and KI in the unknown quantities. If the sample has a total mass of 5.00g and contains 1.51g K, what are the percentages of KBr and KI in the sample by mass?
A 771 mL gas sample at STP is compressed to a volume of 242 mL, and the temperature is increased to 31?C. What is the new pressure of the gas in Pa
Fish are processed into Fish meal and used as a supplemen- tary protein food. In the processing the oil is First extracted to produce wet Fish cake containing 80 wt % water and 20 wt % bone-dry cake
The Balmer series of transitions for the hydrogen atom result in absorption of photons that all originate from the n = 2 level. What are the longest and shortest wavelength photons in the Balmer sequence?
Calculate the pH at the equivalence point for titrating 0.250 solutions of each of the following bases with 0.250 M HBr
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