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Question- The dissolved oxygen concentration in a sample of pond water was found to be 12.5 mg/L. Express this concentration in g/mL.
Please provide the answer of the given question on urgent basis
Describe the preparation of a 1.50 M, pH 8.0 tris buffer (500 mL) using tris base (MW= 121.1 g/mol) and 3.0 M HCl. pKa of tris is 8.3
Calculate the heat released when 25.0 g of water at 0 degrees C crystallizes to ice at the same temp. The specific heat of water is 1.00 cal/(g *degrees C); the heat of fusion is 80.0 cal/g and the heat of vaporization is 540.0 cal/g.
When 5.00 g of fructose, C6H12O6, (FW 180.16 g/mol) is burned in a calorimeter whose heat capacity is 29.7 kJ/oK, the temperature increases by 2.635oK. Calculate the heat of combustion of fructose in kJ per mole.
Calculate the mass of water produced when 9.11 g of butane reacts with excess oxygen. Express the mass of water numerically in grams.
(a) Draw a diagram of the electrochemical cell, labeling all electrodes and solutions. (b) What is the pH in the Pt | H+ | H2 half-cell. (c) What is the value of the equilibrium constant for the reaction occurring in this cell
Solid CO2 (dry ice) forms a molecular crystal that sublimes at -78oC. SiO2 forms a network solid that melts at about 1200oC. Which of the following accounts for this striking difference in properties
account for each of the following properties of solids: the definite volume, the relatively high density of solids, the extremely low rate of diffusion.
which two ions have the same electron configuration in the ground state (a) Rb+ and Ca+ (b) Ba2+ and I- (c) Se2+ And I- (d) Fe2+ and Fe3+
a compound was sent off for elemental analysis and was found to have following composition c 70.6 h 5.9 o 23.5 if the
A 135 mL sample of a 15.0 M ethylene glycol (rm C_2H_6O_2) solution is diluted to 1.50 L.What is the freezing point of the final solution.
Chlorine has two isoptopes, Cl-35 as well as Cl-37 which have masses 34.96885u and 36.96490u respectively. It's average atomic mass is 35.453u. Compute the isotopic abudance of each isotope.
Which of the following chlorides is the most ionic? Please explain a) CH2Cl2 b) SiCl4 c) SCl2 d) PbCl2 Please expalin
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