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To what temperature must a substance be heated so that its thermal energy is about 9 kJ/mol? Express your answer to the nearest degree.
Determine the mass of sodium phosphate that yields 1.00 g of calcium phosphate precipitate.
the concentration of a sodium hydroxide solution is determined by titrating it against a sample of potassium hydrogen
When 35.0 g of an unknown nonelectrolyte is dissolved in 220.0 g of benzene, the solution boils at 83.2°C. Calculate the molecular weight of the unknown nonelectrolyte. The Kb for benzene = 2.53°C/m. The boiling point of pure benzene is 80.1°C.
What mass of carbon reacts completely with 17.8 grams of SiO2 according to the following equation? SiO2 (s) + 2C (s) → SiC (s) + 2CO (g)
What is the partial pressure of H2O in the compressed gas mixture? (See this table.) torr (b) What mass of water vapor condenses to liquid g
List the following reducing agents in order of decreasing strength under standard-state conditions: As(s), Pb(s), Fe(s)
A free particle of mass m in a one-dimensional box with infinite walls at x=0 and x=L, given by the potential function: V(x)= 0 for x =0 L
certain salts of benzoic acid have been used as food additives for decades. the potassium salt of benzoic acid
Which of these is a coefficient in this chemical reaction? P4s(s)+5o2(G) p4o10(S)
Calculate the ion activity product (IAP) and saturation index (SI) of this water with respect to the minerals rhodochrosite (MnCO3), calcite (CaCO3), and gypsum (hydrous CaSO4). Use the following equation
In the acid-base reaction between Sr(OH)2 and HNO3, 0.75 L of 0.85 M Sr(NO3)2 is formed upon the reaction of 0.515 L of HNO3 solution and excess Sr(OH)2.
When the protien is treated with cyanogen bromide, four peptides are obtained. When treated with trypsin, 15 peptides are obtained. What do these results suggest regarding the sequence of the protien? Please be as specific and detailed as possible..
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