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1. What does a low enthalpy of fusion for a solid tell you about the solid (its bonding or type)?
2. What does a high melting point and a high enthalpy of fusion tells you about a solid (its bonding or type)?
3. Which would u expext to have the higher enthalpy of fusion, N2 or I2? Explain ur choice.
4. Benze is an organic liquid that freezes at 5.5C and forms beautiful, feather-like crystals. How much heat transfer occurs when 15.5 g benzene freezes at 5.5C? The enthalpy of fusion of benzene is 127 J/g. If the 15.5-g sample is remelted, again at 5.5C, what quantity of heat transfer is required to convert it to a liquid?
5. Which of these substance has the highest melting point? The lowest melting point? Explain your choices briefly.
a. LiBr
b. CaO
c. CO
d. CH3OH
6. Which of these substance has the highest melting point? The lowest melting point? Explain your choices briefly.
a. SiC
b. I2
c. Rb
d. CH3CH2CH2CH3
7. Why is solid CO2 called Dry Ice?
Explain why is a calibration curve constructed. How. Define how are percent transmittance and absorbance related algebraically
A metal hydroxide with the general formula M(OH)2 has a Ksp value of 0.00076. Calculate the molar solubility of this metal hydroxide
Problem- A 1.24-g sample of a hydrocarbon, when completely burned in an excess of O2(g), yields 4.04 g CO2 and 1.24 g H2O Draw a plausible structural formula for the hydrocarbon molecule
The molar mass for NaCl and water are 58.443 g/mol and 18.015 g/mol, respectively. Calculate the partial molar volumes for NaCl and water in a 0.35m solution
The radioactive decay of thallium-206 to lead-206 has a half life of 4.20min. Starting with 4.10 x 10^22 atoms of thallium-206
determine partial pressure and number of moles of each gas in a 17.25 L vessel at 30 degrees celsius containing a mixture of xenon and neon gases only.
A student follows the procedure for his experiment and burn a peanut. The peanut weighed 0.780 g before combustion and 0.054 g after combustion. The temperature change of an aluminum can be filled with 200 mL of water was 15.3 degree Celsius. (Den..
If the radius of a benzene ring is 120 pm, what is the energy of the lowest energy transition (in units of nm) for benzene
Compute the mass percent composition of nitrogen in each fertilizer: NH3, CO(NH2)2, NH4NO3, (NH4)2SO4.
sodium carbonate is a reagent that may be used to standardize acids and bases in the same way that you have used khp in
The water has the following composition in meq/L. The selective coefficient for calcium over sodium is 2.6. Ca2+ 2.2 meq/L Mg2+ 1.0 meq/L Na+ 3.0 meq/L HCO3- 2.9 meq/L Cl- 3.1 meq/L SO4-2 0.2 meq/L
A chemist has isolated a new natural product and determined its molecular formula to be C24H40O4. In hydrogenation experiments the chemist found that each mole of the natural product reacted with two moles of H2. How many rings are present in the ..
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