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A 40.2 g sample of protein dissolved in a water to prepare a 250 ml solution shows an osomotic pressure of 2.42 torr at 27 ºC. Estimate the molar mass of the protein.
a student wants to make a ph 4.0 buffer solution. she decides to use a buffer made from formic acid and sodium formate
A glass of milk has a volume of 100ml. if the milk has a mass of 103g, what is the density of milk?
The base peak in the mass spec of phenylacetic acid indicated that the compound lost a fragemnt that has an m/z= 17. This fragmentation corresponds to the loss of a(n)
can someone write out and solve the Huckel MO approximation for the treatment of the pi electrons in ethane
High temperature and low pressure low temperature and high pressure none of the above unless a catalyst is present If it's endothermic, it's high temp and low pressure, but does having an exothermic reaction change that?
When 1.0 g of snack cake is combusted in a constant-pressure bomb calorimeter with a heat capacity (including its water) of 10.0 kJ/°C, the temperature of the calorimeter rises by 2.24°C. How many nutritional calories (Calories) are in one serving..
For the elementary process N2O5 (g) = NO2(g) + NO3 (g) the activation energy (Ea) and overall Delta E are 154 KJ/mol, and 136 KJ/mol, respectively. What is the activation energy of the reverse reaction.
a patient needs to take 625 of ibuprofen twice daily. the pills in the bottle are each 250. . how many pills does the
Write down the dissociation reaction. (2) Estimate pH of a solution containing 0.6 g of acetic acid in 1 L of water. Molecular weight of acetic acid is 60 g/mol.
Determine the point group of each of the three possible geometries of the hypothetical Be3+ on, ten draw the molecular orbitals for each geometry,
The temperature of the mixture is 0? , and the total pressure is 1.00 atm . How many grams of helium are present in the gas mixture? Mass of He =?
The heat capacity of copper is 0.382 J/g C. A 22.6 g sample of copper at 93 C is placed in 50 g of water at 23.9 C. What is the final temperature of the system
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