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A carnot cycle engine is operated between a high temperature of 500K and at a low of 3000K. The work done is 800J. how much heat is absorbed at 5000K
A block of Iron has a mass of 483 g. What is the mass of a block of Graphite that has the same volume as the block of Iron?
A balloon is filled to a volume of 9.00 multiplied by 102 mL at a temperature of 18.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 multiplied by 102 K. What is the final volume of the balloon?
A 4.20 g nugget of pure gold absorbed 299 J of heat. The initial temperature was 22.0°C. What was the final temperature.
Draw a Lewis structure for each of the following molecules, and then use the VSEPR theory to predict the molecular deometry of each.
A copper cube measuring 1.60 cm on edge and an aluminum cube measuring 1.61 cm on edge are both heated to 55.3 C and submerged in 100.0 mL of water at 22.1 C.
Calculate the pH of a solution formed by mixing 65 mL of 0.31 M NaHCO3 with 75 mL of 0.10 M Na2CO3.
How many grams of potassium nitrate are required to prepare 0.250 L of a 0.700 M solution?
Low concentration replicate samples of Cd-EDTA gave the following counts in a mass spectral measurement: 178.3, 131.2, 144.3, 159.3, 128.3, 197.7, 149.3, 153.9, 143.3, 160.9. Ten measurements of a blank had a mean of 27.7 counts
15 g of steam at 373 K is added to 250g of H2O (l) at 298 K at constant pressure of 1 bar. Is the final state of the system steam or liquid water? Calculate ?S for the process.
Calculate the pH of a buffer solution (consisting of 30mL 1.0M NaA + 30mL 1.0M HA and a pH of 4.75) mixed with 2mL of 1.0M NaOH. (In class we got a calculated pH of 4.63 for the mixture of the buffer solution with 2mL 1.
How many grams of oxygen gas are needed to react completely with 16.2 moles of hydrogen gas to produce water?
Write an overall balanced equation and a net ionic equation for the complete neutralization of aqueous H2SO4 with aqueous NaOH. Be sure to include phase designations such as (s) and (aq).
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