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Iron pyrite is often called "fool's gold" because it looks like gold (see page 12). Suppose you have a solid that looks like gold, but you believe it to be fool's gold. The sample has a mass of 23.5 g. When the sample is lowered into the water in a graduated cylinder (see Study Question 63), the water level rises from 47.5 mL to 52.2 mL. Is the sample fool's gold (d = 5.00 g/cm3) or "real" gold (d = 19.3 g/cm3)?
Question- Glucose is pumped into some animal cells by a symporter powered by the simultaneous entry of Na+. The entry of Na+ provides a free energy input of 10.8 kJ/mol under typical cellular conditions (external [Na+]= 143 mM, internal [Na+] = 14..
Write a balanced net ionic equation for the neutralization reaction and Tartaric acid,( C4H6O6) , has two acidic hydrogens.
Evolutionary biologists often comment that Darwin's genius (and Wallace's, lest we forget) was all the more impressive given that he had a mistaken understanding of the mechanism of heredity. Imagine that Darwin had known of Mendel's work as he was p..
Magnesium is used in lightweight alloys for airplane bodies and other structures. The metal is obtained from seawater in a process that includes precipitation, neutralization, evaporation
Calculate the new volume of a 7.0Liter balloon if the pressure is reduced from 1.0 atmosphere to 0.80 atmosphere (assume the temperature remains constant)
C6H5OH(s) + 7O2(g) --> 6CO2(g) + 3H2O(g) A 2.000 gram sample of pure phenol, C6H5OH(s), is completely burned according to the equation above.
Use the enthalpies of bond formation to rationalize why nitrogen forms a dimer and phosphorous a tetramer.
When a 0.550g sample of olive oil is burned in a calorimeter, the heat released increases the temperature of 370g of water from 22.7C to 38.9C? What is the energy value of the olive oil in kJ/g and kcal/g?
2 NH3 + CH3OH → products . How much NH3 is needed to react exactly with 21 grams of CH3OH
if the activation energy of a unimolecular reaction is 63kj mol-1 what fraction of the reactant molecules have
A 25.00 mL portion of 0.100M Ag+ is added to a solution containing 0.0010 mole of Cl-. This solution is then titrated with 0.0500M SCN- to the end point. Calculate the volume of SCN- is required for the titration.
How many grams of LiCO3 do you need to weigh out to dissolve in the 5.0 liters? If you had started with a 5000. ppm solution of Li2CO3 solution, how many mL of it would you need to pipet into the 5.0 liter to achieve the same 425 ppb Li 1 solution..
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