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insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 475 of insulin at a concentration of 30.0 . What is the total mass of insulin in the bottle?
The concentration of Fe2+ in a sample of water is 350 mmol/L At what pH will 99% of the Fe2+ be precipitated as Fe(OH)2? Ksp = 7.9 x 10-15
A solid brick of dry ice (CO2) weighs 0.75 kg. Once the brick has fully sublimated into CO2 gas, what would be the volume of solid brick at STP.
.1500g of an unknown sample was passed through a column of Amberlite-IR-200(+) resin and titrated with .2050M NaOH. If 9.75mL of titrant was required to reach phenolphthlein endpoint,
A layer of peat beneath the glacial sediments of the last ice age has a carbon-14/carbon-12 ratio that is 21.0% of that found in living organisms
What is the expected freezing point of an aqueous solution of 2.62 kg of nitric acid, HNO3 , in a solution with a total mass of 5.91 kg? Assume that the nitric acid is completely ionized.
When 4.03 g of CH3OH was mixed with 6.33 g of O2 and ignited, 3.92 g of CO2 was obtained. What was the percentage yield?
The complex ion [Co(CN)6]^-3 absorbs a photon of wavelength 2.90×10^2 nm. What is the splitting energy of this complex?
How many grams of H2O can be cooled from 45 degrees C to 15 degrees C by the evaporation of 63 grams of water.
At 0.500 atm and 15.0 degrees celcius a sample of gas occupies 120 L. What volume does sample gas occupy at 0.850 atm and 10.0 degrees celcius?
what is the density of sample of ammonia gas if the pressure is 705mmHg and the temperature is 63.0 degrees C?
Estimate the ratios of the basic and acidic forms of the histidine side chain
how much heat (in KJ) is required to warm 10g of ice, initially at -10 degree celsius, to steam 110 degree celsius?
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