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a. What is the percent by mass of water in iron(II) sulfate heptahydrate, FeSO4•7H2O (or what percent of the molar mass of FeSO4•7H2O is due to the waters of crystallization)?
b. What mass due to waters of crystallization is present in a 3.38-g sample of FeSO4•7H2O?
some people said that the precipitate disappeared and the solution went back to a bright orange/yellow clear colour, what is the chemical equation that describes both these reactions,
A gas contains 17% O2, 11% CO2 and 72%N2. It is at 1.013 *105 Pa pressure. Calculate the partial pressure of each component
If 25.0 ml of .451 M NaOH solution is titrated with .253 M H2SO4, identify the principal components (ions, molecules) in the flask at the endpoint besides solvent water or indicator.
Eventually, his mother decides to take him to the doctor who diagnoses it as an acute case of middle ear infection (otitis media), and prescribes amoxicillin for his treatment. He weighs 44lb, and the daily dose of amoxicillin for the treatment of..
A 0.250g sample of citric acid dissolved in 25.0 mL of water requires 37.20 mL of 0.105 M NaOH for complete neutralization. What is the molecular formula of citric acid?
Calculate the number of molecules in 9.00 moles H2S. Express your answer numerically in molecules.
Wireless networks are so ubiquitous and inexpensive that anyone can easily build one with less than $100 worth of equipment. However, wireless networks are exactly that-wireless- they do not stop at walls. Living in an apartment, dorm, or house means..
Design a laboratory set-up that would enable you to separate a mixture of three hydrocarbons with different boiling points. Draw and label a diagram of your set-up
The mass of 322 mL of hydrogen gas at 4.0 atm and -73°C is 1.21 grams. What is the density of hydrogen gas at STP?
How many grams of sodium azide are needed to provide sufficient nitrogen gas to fill a 35.0x35.0x25.0 cm bag to a pressure of 1.20 atm at 26 degress C.
A chloroform-ethanol solution at 35 oC with ?ethanol=0.200 in the liquid phase has a vapor pressure of 304.2 torr and a vapor composition of Yethanol= 0.138. Calculate the activity and activity coefficient for ethanol in this solution
Which of the following would have a density of 1.21g/L at 7.0*C and 0.978 atm? Please explain why don't just give me the answer.
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