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A 35.8-g sample of cadmium metal was melted by an electric heater providing 4.66 J/s of heat. If it took 6.92 min from the time the metal began to melt until it was completely melted, what is the heat of fusion per mole of cadmium?
A copper wire (density = 8.96 g/cm3) has a diameter of 0.39 mm. If a sample of this copper wire has a mass of 43 g, how long is the wire?
What is the change in enthalpy when 18.4 g of steam at 100?C is converted to liquid water at the same temperature and pressure? The heat of vaporization of water is 40.7 kJ/mole. Answer in units of kJ.
Do you expect CN- anion to be affected by a magnetic field? Explain your reasoning. (d) What is the bond order of the anion CN- ? (e) What is the bond order of the neutral CN?
In an experiment, equal volumes of 0.00200M FeCl3 and 0.00200M NaSCN were mixed together and reacted according to the equation:
Consider the formation of n-butyl alcohol and NaBr in the presence of H2SO4. If you start with 1.31g of n-butyl alcohol and end up with 1.79g of n-butyl bromide
what is the correct electron configuration for Cr (chromium). Chose the proper Lewis dot structure for the compound or poliatomic ion: Sulfur Dioxide (SO2).
If 8.00 kJ of heat are added to 200. g of water at 20.0 C, what is the final temperature of the water?
Determine the boiling point of an aqueous solution that is 2.30 m ethylene glycol (C2H6O2); Kb for water is 0.52 degrees celsius/m.
Why is the water bath used to heat the reaction? 4)What is the mechanism of the reaction of phenylmagnesium bromide and CO2? Include the workup steps. 5) In this experiment, it is important to use freshly obtained dry ice. Why?
Calculate the molar mass of X. 2.Identify the element symbol for X F2+2XBr -----> Br2+2XF
It decomposes into its elements. Write the balanced equation for this reaction. If 71.8 g of Hgo is decomposed, calculate the volume of oxygen at STP
If the methane contained in 5.00L of a saturated solution at 25 ^circ rm C was extracted and placed under STP conditions, what volume would it occupy.
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