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Give the answer ect number of significant figures. Translate the "E" below into "x 10" to the power of whatever numto the corrber follows it. for example, 6.8 E +01 is 6.8 x 10^1
a.) 1.77741 E+02 + 7.833 E+03 + 1.0239E-03
spontaneous at high temperature or spontaneous at low temperature. (a) The temperature of a sample of Co(s) is lowered from 60°C to 25°C. (b) Ethyl alcohol evaporates from a beaker.
A buffer solution with a pH reading of 8.50 was prepared by mixing 0.25 mole acid (HA) and 0.05 mole NaOH in 500.0mL DI water... how much more grams of NaOH
A gas occupies 1.55 L at 0.80 atm. What pressure would the gas exert if the volume were allowed to increase to 3.50 L?
When octane is burned in air, it chemically reacts with oxygen gas to produce carbon dioxide and water . What mass of octane is consumed by the reaction of of oxygen gas?
Complete combustion of 4.80 g of a hydrocarbon produced 14.7 g of CO2 and 7.02 g of H2O. What is the empirical formula for the hydrocarbon?
Which solvent displayed the strongest propensity to encourage keto-enol tautomerization. CHCl3, DMSO, CH3OH? Or does this propensity more closely follow the type of solvent it falls under (such as nonpolar, polar aprotic, or polar protic).
Calcium nitrate will react with ammonium chloride at slightly elevated temperatures, as represented in the equation Ca(NO3)2(s) + 2NH4Cl(s) ? 2N2O(g) + CaCl2(s) + 4H2O(g). What is the maximum volume of N2O at STP that could be produced using a 2.4..
What is the volume in mL of 0.845 M NaOH(aq) needed to reach the equivalence (stoichiometric) point in the titration
A second worker approaches to within 5 meters behind a shield that attenuates 60% and remains there for 20.0 minutes. What is the ration between the absorbed doses for the two workers
If 500 mL of air contains 2 x 1022 particles (atoms and molecules), how many particles do you inhale in one day if you breathe 15000 L of air?
Vapor pressure measurements at several different temperatures are shown below for mercury. Determine graphically the molar heat of vaporization for mercury.
Draw the stereochemical (3-D) structures of these compounds and explain these observations.
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