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How can one tell from a reaction diagram whether a reaction is exothermic or endothermic?
How many moles of Na2SO3 were added to the calorimeter cup if 30.0mL 0.50 M NaOCl and 70.0mL 0.50 M Na2SO3 were combined?
Each uranium atom that decays eventually results in the formation of one lead atom. Assuming that the rock did not contain any lead-206 atoms originally, find the age of the rock when the ratio of uranium to lead atoms is 8 to 1.
A flexible container contains 1.50 L of gas at 25 degrees Celcius. What is the new volume when the container is heated to 100 degrees Celcius?
An organic compound X contains C, H, and O. A 16.69 g sample of X underwent combustion analysis, leading to the production of 44.71 g CO2 and 10.99 g H2O. What is the emperical formula of the compound?
When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?
The vapor pressure of benzene (C6H6) is 120 torr at 27.0C, and its normal boiling point is 80.1C. What is the molar heat of vaporization of benzene.
Each atom in HF has a fractional charge of 0.416. What is the dipole moment of HF? 2. Which of the following molecules has a dipole moment? 3. Of the ions below, which ion has the smallest atomic radius?
What volume of 0.1 M KMnO4 would be required to titrate 0.56 g of K2[Cu(C2O4)2] • 2H2O?
Calculate the pH of a solution made by adding 42 g of sodium acetate, NaCH3COO, to 16 g of acetic acid, CH3COOH, and dissolving in water to make 300. mL of solution.
Estimate the thickness of the lipid bilayer in a biological membrane - Estimating the thickness of a membrane by using bond distance.
Predict the anode, cathode, and overall cell reactions when an aqueous solution of each of the following salts is electrolyzed in a cell having
Hydrogen ion concentration in mixtures, Calculate the hydrogen ion concentration of the following mixtures. a. 25mL of 0.10M HClO4 and 25mL of 0.15M HClO2
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