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Explain the oxidation reduction happening behind the reaction: 2 NH4NO3 (s) -> 2N2 (g) + O2 (g) + 4H2O (l)
a separatory funnel is used in this method of separating liquids . f. liquid is allowed to evaporate, leaving the solid behind c. element
Hemoglobin has a mass of about 67,000 g/mol. It is 0.3335% iron by mass. How many iron atoms are in a molecule of hemoglobin?
A 295mLflask contains pure helium at a pressure of 742torr . A second flask with a volume of 465mL contains pure argon at a pressure of 717torr .
A bone sample with 2.8 g of carbon has 17.4 disintegrations per minute. How old is the bone sample in years. What percentage of the atoms of carbon in the biosphere are C-14?
For the reaction shown, calculate how many moles of each product form when the given amount of each reactant completely reacts. Assume that there is more than enough of the other reactant. C3H8(g)+5O2(g)->3CO2(g)+4H2)(g)
The problem: CaCO3 can be roasted to produce CaO and CO2. This reaction is carried out in a flash connected to an open-end mercury manometer when the atmospheric pressure is 754 torr.
What is the change in internal energy (?E) when a system loses 10 kJ of energy and 5000 J of work is done on the system?
A 100.00 ml of volume of 0.500 M HCl was mixed with 100.00 ml of 0.500 M KOH in a constant pressure calorimeter. The initial temperature of individual acid and base was 23 degree celsius.
A gas occupies a volume of 458 mL at a pressure of 1.01 kPa and a temperature of 295 K. When the pressure is changed, the volume becomes 477 mL.
How many grams of dry NH4Cl need to be added to 2.10L of a 0.500 M solution of ammonia, , to prepare a buffer solution that has a of 8.84? Kb for ammonia is 1.8*10^-5.
required to reach the first equivalence point of a solution of citric acid (H3C6 H5O7), how many ml of NaOH are required to completely neutralize this solution
What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 . 5SO3?
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