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Explain what element is the central atom, Define how many bonds does the central atom form, is it polar or non-polar, Define what is the direction of electronegativity?
what is the molarity of phosphoric acid in a solution that is 84% by mass phosphoric acid and has a density of 1.87 g/ml?
Draw the electron-dot formula for each of the following: a) H3COCH3 (the atoms are in the order C O C); b) CS2 (the atoms are in the order S C S); c) CLO2^-; d) SF3^+; e) H2CCHCN (the atoms are in the order C C C).
Octane has a density of 0.692 g/ml at 20 degrees celsius . How many grams of O2 are required to burn 16.0 gallons of C8H18 ?
Draw graphs representing Boyle's law, Charles's law, and Gay-Lussac's law for a fixed amount of gas. Make sure that you label each axis and state the assumptions for each law-that is, the variable(s) that is (are) held constant for each law.
Complete reaction of 4.00 grams Al at 25 celsius and 1.00 atm releases 124.1 kJ heat to the surroundings. What is the enthalpy change of the reaction at 25 celsius and 1.00 atm in kj/mol rxn.
Diphosphorus pentoxide is added to water Hydrogen sulfide gas is bubbled through a solution of silver nitrate
How many grams Na3PO4 of will be needed to produce 475 mL of a solution that has a concentration of Na+ ions of 0.900 M ?
The approximate distance between mars and earth is about 1.29 x 10^8 miles. How many seconds would it take for TV pictures transmitted from the viking space vehicle on mar's surface to reach earth ? enter your answer in scientific notation
Semi-Empirical Expression for a Dilute Real Solution, Starting with the definition of osmotic pressure
Calculate the binding energy in kilojoules per mole of nucleons of P for the formation of 30P and 31P. The required masses (in g/mol) are 1^1H = 1.00783, 0^1n = 1.00867, 15^30P = 29.97832, and 15^31P = 30.97376.
Predict whether each of the following bonds is ionic, polar, covalent, or nonpolar covalent: a) Si--O; b) K--Cl; c) S--F; d) P--Br; e) Li--O; f) N--P.
Explain why dichloroethene has a boiling point of 60 degrees C while trans-dichloroethene as a boiling point of 48 degrees C. Include drawings of the structures with dipoles in your answer.
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