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A stainless steel spoon weighs 25.2 g and is at a temperature of 18.5 oC. It is immersed in 81.7 mL of hot coffee (T = 84.0 oC) in a Thermos flask. What is the final temperature of spoon + coffee? (Assume that the heat capacity of the spoon is the same as that of pure iron and that the heat capacity of the coffee is the same as that of pure water.)
the radiation level was determined to be .00935 microCi/mL. If 51Cr has t1/2=27.7 days, what is the volume of blood in the patient?
Show two different ways to make methyl propionate, using methanol, propionic acid and other necessary reagents The methanol and propionic acid do not have to both be used in the first step.
When there are branches in either the acid or the alcohol, how do you name the ester formed from the reaction of these two? For example,
What is the total molar concentration of all the ions in 0.020 M solutions of the following salts in water. 0.020 M KCl = ____ M ions 0.020 M CuSO4 = ____ M ions 0.020 M CaCl2 = ____ M ions
what is the minimum amount of KCN (in g) needed to react with 15.6 g of gold?
What is a zymogen? Is it used over and over like other enzymes? And what is the physiological advantage
A gas has a volume of 590 mL at a temperature of -55.0C. What volume will the gas occupy at 30.0C.
lead(II) sulfide was once used in glazing earthenware. It will react with hydrogen peroxide to form lead (ii) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265g of lead(ii) sulfide?
Calculate the plate height (H) for a 16 cm-long column with a stationary phase particle diameter
A sample of argon gas at a pressure of 0.981 atm and a temperature of 29.7oC, occupies a volume of 12.5 liters. If the gas is allowed to expand at constant temperature to a volume of 19.1 liters, the pressure of the gas sample will be
The laser beams are tightly focused. They briefly (for 0.5s) exert enough pressure to confine 500sodium atoms in a vloume of 1.0x10^-15m^3. The temperature of this gas is 0.00024K, the lowest temperature ever reached for a gas. Compute the root-me..
Calculate the amount of solute in g needed to prepare 431.5 g of 8.85 %(m/m) LiNO3 solution.
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