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Solid CO2 (dry ice) forms a molecular crystal that sublimes at -78oC. SiO2 forms a network solid that melts at about 1200oC. Which of the following accounts for this striking difference in properties?
Unlike C, Si does not normally exist in the +4 oxidation state.Si is more electronegative than C.Si is a stronger Lewis base than C.Unlike C, Si uses d-orbitals in bonding.Unlike C, Si cannot make multiple bonds.
Gold has a density of 19.3 g/cm3. How many pounds does a gold sphere weigh if it has a diameter of 5.20 inches?
Calculate the molar mass of a Nonelectrolyte that lowers the freezing point of 25.00 g of water to -3.9 degrees C when 4.27g of the substance is dissolved in the water.
Using the equation Fe2O3+2Al-->2Fe+Al2O3, how many grams of Al are needed to completely react with 135 g Fe2O3
write up the chemical reaction between resorcinol and phtalic anhydride.
Compute the number of kilograms of hydrogen that pass per hour through a 5-mm-thick sheet of palladium having an area of 0.20 m2 at 500°C. Assume a diffusion coefficient
Which of the following is not a buffer solution?
A 40-foot "fiberglass" boat hull weighs 2000 kg. Sixty percent of that is a fully cured crosslinked polyester resin (the remainder is the glass reinforcing fibers
Sodium Chloride (NaCl), Please express answer in grams and breakdown of how answer was derived
Calculate the density of xenon gas at 182 oC and 605 torr. Use R = 0.0821 L-atm/mol-K for the value of the gas constant.
Sulfuric Acid is the most commonly produced industrial chemical in the world. It is shipped in a concentrated form to save volume and weight.
A sample of sodium reacts completely with 0.426 of chlorine, forming 702 of sodium chloride. What mass of sodium reacted?
Calculate the amount of water (in liters) that a camel can produce from 1.0 kg of fat. Assume for simplicity that the fat consists entirely of tripalmitoylglycerol. please show work how you arrive with the answer.
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