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Determine the arrangement of electron pairs about Se in the SeO2 molecule. What would you expect for the molecular geometry of the SeO2 molecule?
If the enthalpy change for the reaction is 21 kJ/mol, what is the minimum value of the change in entropy for the reaction. Please answer in J/K* mol
does it mean that the solution will shift towards the products because there is excess of reactants? what does it mean when the solution is orange (is it shifting towards products or reactant)?
A bicycle tire is filled with air to a pressure of 81.0 psi at a temperature of 19°C. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58°C. The volume of the tire increases by 2.0%. What is the new pressure in the ..
when 100g Mg3N2 reacts with 75.0g H20, 15.0g of NH3 is formed. What is the percent yield? Mg3N2+6H2O-->3Mg(OH)2+2NH3
the volumes in the buret and the flask are identical, and the concentration of the acid in the buret is 1.00 M. If the entire volume of the buret is required for titration of the base in the flask, what is the concentration of base?
Diamond is the hardest known substance. Fe metal is soft sunstance. Using your knowledge of bonding, explain why diamond is hard
individual suffering from a high cholesterol level in her blood has 239 of cholesterol per 100 of blood. If the total blood volume of the individual is 5.4 , how many grams of total blood cholesterol does the individual's body contain?
The steel bomb of bomb calorimeter, which has a volume of 75 mL, is chaged with oxyen to a pressure of 145 atm at 22 C. Calculate the moles of oxygen in the bomb. Calculate the grams of oxygen in the bomb.
Calculate the pH of the solution after the addition of 0.100 mL NaOH. The Ka for HC2H3O2 is 1.8x10^-5.
The alcohol (ethyl alcohol/ethanol) content in a 12 oz. bottle of beer is about 5%. The man's weight is 150 lbs and he was drinking over an hour period. State the chemical reaction that took place in the patient's body.
Explain 3-A 0.421 g sample of aspirin prepared in the laboratory is dissolved in 95% ethanol, diluted with water, and titrated to a phenolphthalein endpoint with 17.3 mL of 0.114 M NaOH. What is the percent purity of aspirin in the sample?
If you set the freezing point of oleic acid as 0 and the boiling point as 130, what is the freezing point of water on this new scale?
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