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a mixture of Feo and Fe3O4 when heated in air to constant weight , gains 5 % in its weight . find out composition of mixture.
What are the missing coefficients for the skeleton equation below?
The pH of a bicarbonate-carbonic acid buffer is 7.80. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-).
Calculate delta H for this reaction at 298K. Calculate delta G for this reaction at 298K. Calculate delta S for the reaction, for the surroundings, and the total delta S.
The mass of a golf ball is 45.9 g. If it leaves the tee with a speed of 61.0 m/s, what is its corresponding wavelength?
When 0.60 grams of a molecular covalent compound is dissolved in 10 grams of water, the freezing point of the soludion is -1.86 C. Given that the freezing point of pure water is 0 C and that the freezing point depression constant for water is 1.85..
What mass of C4H6 in grams is consumed in the reaction below when 36.9 grams O2 (g) are also consumed?
If you won 1 mol of dollars the day you were born as well as spent 1billion dollars a second for the rest of your life, explain what percentage of the prize money would remain, if any, while you decide to retire from spending at 90 years of age
Problem- How many liters of o2 at 298K and 1.00 bar are produced in 2.00 hr in an electrolytic cell operating at a current of .0200 A
Which of the following molecules is polar?
Find the total number of atoms in a sample of cocaine hydrochloride, C17H22ClNO4 of mass 20.0 mg.
A 25.5g aluminum block is warmed to 65.3 degC and plunged into an insulated beaker containing 55.0g water initially at 22.3 degreeC. The aluminum and the water are allowed to come to thermal equilibrium.
a student observed after an experimentnbsp that a gas sample of 250-mlnbsp has a mass of 0.243 g atnbsp a temperature
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