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Phenolphthalein turns pink in solutions that are roughly 1.0 x 10^-5 M in hydroxide ions. The only source of hydroxide ion is your Ca(OH)2. Let's assume the amount of water left behind in the beaker to test for complete transfer is about three drops, or .15 mL. What % of the solution/solid was transferred over to the container
Present-day plant life has a carbon-14 decay rate of 16 disintegrations per minute (dpm) per gram of carbon. If a contemporary wooden chair were somehow preserved for the next 3,900 years, what 14C decay rate should be expected from the wood used ..
The final partial pressure of NOBr was 2.5 atm after the following equilibrium was established: 2NOBr(g) 2NO(g) + Br2(g). What is the value of Kp
Count Rumford observed that using cannon-boring machinery, a single horse could heat 11.6 kg of water (T = 273 K) to T = 355 K in 2.5 hours
Explain why higher levels of defects are found in solids at high temperatures and close to their melting points.
The functional differences and differences in 3-D structures between 2 different enzymes from e. coli result directly from their different:
Estrone is a female sex hormone that is known to contain 80.0% carbon, 8.2% hydrogen, and the remainder oxygen. If 793mL of estrone is found to have a mass of 4.97g at 0.90atm and 200oC, find the molecular formula for estrone.
How do you interpret the experimental MP for this lab when the theoretical melting point is 82-83 for trans and 81-82 degrees for cis? Does it melt as expected for a mixture of cis and trans isomers?
2NO2 + Cl2 = 2NOCl The inital pressure of NO2 was 1.577 atm and the inital pressure of Cl2 was 0.427 atm. At equilibrium, the partial pressure of NOCl is 0.624 atm. Calculate K.
assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts heat capacity(s) 37.7 jmolk
Hydrogen gas is contained in a one-liter vessel at "STP"(0 degrees Celsius and 1 Std. Atm.). Flourine gas is contained in a second one-liter vessel at the same conditions of temperature and pressure.
How much heat is required to warm 219 g of ice from -45.7°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C
A flask that can withstand an internal pressure of 2491 torr, but no more, is filled with a gas at 21.0°C and 758 torr and heated. At what temperature will it burst?
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