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How many molecules of calcium sulfate will be present in 100 grams of calcium sulfate?
What is the heat energy required to convert 0.261 moles gaseous ethanol at 300 deg.c to 25 deg.c at 1 atm with the following information.
mw of 4-ethylphenol c8h10o 122 gmolmw of tetrabutylammonium bromide c16h36brn 322.37 gmolquestion 1. calculate how
(a) When 36.0 g H2O are mixed with 67.0 g Fe, which is the limiting reagent? (b) What mass in grams of black iron oxide is produced?
a group 3A metal has a densityof 2.70 g/cm3 and a cubic unit cell with an edge length of 404 pm . Reaction of a 1.07cm3 chunk of the metal with an excess of hydrochloric acid gives a colorless gas that occupies 4L at 23C and a pressure of 740 mm H..
when the base was 0.292 M and the cation was 1.89 M. Calculate the equilibrium dissociation constant (Kb).
mixture of 2-amino-propanoic has a specific rotatio of -5.6. What is the percent composition of the mixture of the specific rotation for the S enantiomer is +14.5
Suppose 2.00 atm of an ideal gas occupies a volume of 80 mL. What pressure will the gas have when the volume is expanded to 100 mL?
The level of liquid kerosene rises from 8.5 ml to 15.3ml. Calculate the density of the solid and identity the compound from the following list.
Problem- The equation shows one mole of ethanol being burned in oxygen. Convert the energ released into its equivalent mass: C2H5OH(l) + 3 O2(g) (arrow) 2 CO2(g) + 3 H2O(l) (triangle)H= -1418kJ/mol
Find the VeE at which the pea k minority carrier concentration in the base is about to Ne = 1017 cm-3.
The ionization energy for potassium is 419 \rm kJ/mol. The electron affinity for bromine is -325 \rm kJ/mol. Use these values and Hess's law to calculate the enthalpy for the following reaction:
What will be the final temperature of a mixture made from equal masses of water at 24.1 C, ethanol at 37.3 C, and iron at 93.3 C? The specific heat capacities of each are: 0.449J/g C (Fe), 4.18J/g C(Water), and 2.42 J/g C (ethanol).
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