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A physiological saline solution is 0.92% sodium chloride (NaCl) by mass and has a density of 1.005 g/mL. What is the osmotic pressure of such a solution at body temperature of 37 degree C?
Using the same sample of gas ( = 275 , = 43 ), we wish to change the pressure to 2750 with no accompanying change in volume or amount of gas.
A gas measures 10ml at 27degree celcius and 750mm of mercury what will be the mole of gas at 15degree celcius and 750mm of mercury
solid sodium hydroxide is dissolved in 127.3 g of water at 22.0 C in a perfect calorimeter. Assuming the heat capactity of the solution is the same as water, what is the final temperature of the solution?
Consider a steel tank whose volume is 65.0 L and which contains O2 gas at a pressure of 18100 kPa at 22°C. What mass of O2 does the tank contain?
Magnesium has three isotopes, Mg-24, Mg-25, and Mg-26. The percentage abundance of each in order is 78.70%, 10.13%, 11.17%.
Energy level of electrons in atoms - The 3s level in hydrogen has a lower energy than the3d level in hydrogen.
Determine whether each of the following causes an increase or decrease in the activity of the electron transport chain. 1. High NADH concentration
The average pH of precipitation in rural areas is 5.80. Assuming that the pH is controlled by the carbonate system, i.e., no anthropogenic acid gases are present in the atmosphere.
Each cube measure 2.0 cm on each side.After you carefully lower each cube into the water of its own cylinder, what will the water level be in each cylinder?
the mass of ahydrogen atom is 1, and the mass of an oxygen atom is 16 daltons,how many molecules does one mole of sugar(C12H22O11) contain?
The complex formed between Cu(I) and 1,10 phenanthroline has a molar absorptivity of 7000 L cm-1 mol-1 at 435 nm, the wavelength of maximum absorption.
36 grams of an impure zinc sample are reacted with excess hydrochloric acid and 10 L of hydrogen gas are collected at STP, what is the percentage of PURITY of zinc sample
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