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A certain system absorbs 0.200 kJ of heat and has 0.700 kJ of work performed on it. What is the value of ΔEfor the change? Is the overall change exothermic or endothermic?
For the molecules: ozone, sulfur trioxide and nitromethane ( CH3NO2 ), determine the hybridization of the central atom
identify the acid(proton donor) and base(proton acceptor) for the reactants in each of the following
A. Liquids have very strong attractive forces holding them together B. Liquids have moderately strong attractive forces holding them together C. Liquids have very weak attractive forces holding them together.
it takes 217 kjmol to eject electrons from a certain metal surface. what is the longest wavelength of light nm that can
Nitrogen monoxide, a gas recently found to be involved in a wide range of biological processes, reacts with oxygen to give brown NO2 gas. 2 NO(g) + O2(g) ? 2 NO2(g) ?rH° = -114.1 kJ/mol-rxn
A 40 foot fiberglass boat hull weighs 2000 kg. 60% of that is a fully cured crosslinked polyester resin (the remainder is the glass reinforcing fibers, pigment, fillers, etc.).
A layer of peat beneath the glacial sediments of the last ice age has a carbon-14/carbon-12 ratio that is 22.6% of that found in living organisms.
Consider a sample that consists of three green spheres and one blue sphere. The green mass is 2.00 g, and the blue mass is 3.00 g. Calculate the fractional abundance of each sphere in the sample.
if a frying pan needs a teflon coating that is 1.00 mm thick and the area to be covered is 36.0 square inches how many
Estimate the osmotic pressure of human blood at 37°C. Assume blood is isotonic with a 0.16 M NaCl solution, and assume the van't Hoff factor i is 1.9 for NaCl.
If 10.00 mL of 0.050M KI solution is mixed with 40.00 mL of other reagents what would be diluted concentration of KI
Calculate the amount of antimony in the sample and its percentage in the ore.
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