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You are a logger out in the woods. You find a log that could be spruce or birch. In order to figure out which is, you put the log in a big bucket and find that it displaces 2.7 gallons of water and it weighs 19.8 lbs. Is it spruce or birch? (Density of spruce 0.9 g/cm^3, birch 0.4 g/cm^3)
Luminol is so sensitive that it can detect blood that has been diluted 10,000 times. A basic solution of luminol is often sprayed onto surfaces that are suspected of containing minute amounts of blood.
determine how many moles of fe3o4 could be formed if 9.00 mol iron react with 12.00 mol oxygen?determine how many grams
If I burn 0.315 moles of hexane (C6H14) in a bomb calorimeter containing 5.65 liters of water, what's the molar heat of combustion of hexane is the water temperature rises 55.4 ºC? The heat capacity of water is 4.184 J/g ºC .
Given that the nuclidic masses of 238U = 238.0508 amu and an a particle = 4.0026 amu, calculate the mass of 234Th in units of g/mol.
This race is a challenge to the human organism! By what percentage does the oxygen number density decrease between the start and the finish of the race?
A synthesis gas at 500°C that analyzes 6.4% CO2, 0.2%O2, 40% CO, 50.8% H2, and the balance nitrogen is burnt with 40% dry excess air, which is at 25°C. The composition of the flue gas, which is at 720°C is 13% CO2, 14.3%H2O, 67.6% N2 and 5.1% O2. ..
Find the value of the equilibrium constant at each temperature you must first find the value of G0 at each temperature by using the equation G0 = H0 - TS0 For this reaction the values are H0 = +88.3 kJ/mol and S0= 151.3 J/mol*K
Calculate the pH of a solution containing 0.085M nitrous acid (ka = 4.5 x 10-4) and 0.100M KNO2.
a certain monoprotic weak acid with ka 6.8 times 10-7 can be used in various industrial processes but is no longer
the water at the gas-collecting port is assumed to be 25c but it is actually 15c. how will this error affect the
Bromine is a reddish-brown liquid. Calculate its den-sity (in g/mL) if 650 g of the substance occupies 188mL.
Physical propoerties and intermolecular forces, What type of intermolecular forces accounts for the following differences in each case?
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