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Five mineral samples of equal mass of calcite, CaCO3 (MM 100.085) , had a total mass of 11.0 ± 0.1 g. What is the average mass of calcium in each sample? (Assume that the relative uncertainties in atomic mass are small compared the uncertainty of the total mass.)
The compound As2I4 is synthesized by reaction of arsenic metal with arsenic triiodide. If a solid cubic block of arsenic (d 5.72 g/cm3) that is 3.03 cm on edge is allowed to react
Description of physical chemistry, Find delta Smix, delta Gmix, delta Hmix, and delta Vmix if 125 g of benzene and 25 g of naphthalene are mixed at 60 degrees C.
The combustion of 135mg of a hydrocarbon produces 440mg of CO2 and 135mg of of H2O. The molar mass of the hydrocarbon is 270 g/mol. Determine the molecular formula of this compound ?
What is the structure for hexadecanol? What would explain why it is a solid, rather than a liquid?
Acetylene gas (C2H2) used in welding, produces an extremely hot ?ame when it burns in pure oxygen according to the reaction 2 C2H2(g)+5 O2(g) -→ 4 CO2(g)+2 H2O(g)
Explain Cyclopentadiene reacts as a diene in the the Diels-Alder reaction a great deal faster than does 1,3 butadiene.
Important information about Second Order Reaction, The reaction of CH3CH2NO2 + OH- --> H2O + CH3CHNO2 - is a second order and k at 273 K
What is the final Celsius temperature if 4.55 L of nitric oxide gas at 35°C is cooled until the volume reaches 1.00 L
A foul-smelling gas produced by the reaction of with was collected, and a 1.00 sample was found to have a mass of 1.52 at STP. What would be the formula.
Caffeine, C8H10N4O2, is a stimulant found in tea and coffee. A sample of the substance was dissolved in 41.5 g of chloroform, CHCl3, to give a 0.0940 m solution.
Determine the trend in sizes of the ions O 2- ,N 3- , F - and also explain why does the trend exist? Also describe which of the molecules contains polar covalent bonds but is NOT itself a polar molecule?
Calcium reacts with iodine z=53. If a sample of the compound formed contains 7.4x10^21 calcium ions, how many iodine ions does it contain.
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