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Balance each of the subsequent oxidation-reduction reactions. For each of the reaction, demonstrate how electrons are gained and lost during the reaction.
i) Mg(s) + O2 (g) ----> MgO(s)
ii) Na(s) + S(s) ----> Na2 S(s)
iii) Al(s) + Sn(NO3)2 (aq) -----> Al(NO3)3 + Sn(s)
iv) Li(s) + Cl2 (g) ----> LiCl(s)
Use the appropriate relationships from the chapter of electrons in Atoms to determine the wavelength of the line in the emission spectrum of He+ produced by an electron transition from n=5 to n=2
A solution containing .2g of an unknown substance in 2.5 g of cyclohexane is found to freeze at 5.1 C what is the molar mass of the unknown substance
If High purity benzoic acid [C6H5COOH; H(rxn) = -3227 kJ/mol] is a combustion standard for calibrating bomb calorimeters. If an unknown quantity of the benzoic acid is burn up in the calorimeter (heat capacity = 1365 J/C) containing exactly 800 g ..
Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point constant is 5.03°C · kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.
You may want to write out the reaction)When ethane (C2H6) reacts with chlorine (Cl2) the product is C2H5Cl and HCl. In a certain experiment 165 g of C2H6 reacts with 255 g of Cl2.
A solution of calcium ions contains 5 meq/650. cm3 of calcium ion. How many moles of calcium ion does this solution contain?
A tightly sealed 5.0 L flask contains argon at 69.0 deg. C and 781 mm Hg. The flask is heated until the pressure is doubled. What it the temperature of the gas.
Draw the structure of a DNA nucleotide represented by the abbreviation "C." Do not include formal charges on the phosphate group.
What volume (in milliliters) of 0.100 M NaOH should be added to a 0.120 L solution of 0.024 M glycine hydrochloride
What is the magnitude of the change in pH when 1.8 g of NaOH is added to 1.00 L of a solution that is0.100 M in NH4Cl
You may assume that the specific heat of the solution is the same as the specific heat of pure water (4.184 J/g degrees C) and the calorimeter itself absorbes no heat.
Calculate the radius of an iridium atom, given that Ir has an FCC crystal structure, a density of 22.4 g/cm3, and an atomic weight
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