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It was determined from six replicates measurements that a candlewick contained 12.1 ppm lead and the standard deviation was 0.6ppm. assuming no systematic errors, the true means is likely to lie between what values at 95% confidence
what is the percentage ionization of the benzoic acid in the resulting solution. Ka(benz acid)=6.5 * 10^-5
Provide some diagnostically useful differences you would expect in the IR spectra between starting materials and product for the reaction you carried out (e.g. if I was asked this regarding the oxidation of cyclohexanol to cyclohexanone
How much heat in kilojoules is required to warm 10.0 g of ice, initially at -10.0^\circ C, to steam at 110^\circ C. The heat capacity of ice is 2.09 {\rm J}/{\rm g} ^\circ {\rm C} and that of steam is 1.84 {\rm J}/{\rm g} ^\circ {\rm C}. q=?kJ
What is the internal energy of an ensemble of 1 mole of particles having two non-degenerate electronic energy levels separated by 1000cm^-1 at 1310K?
Calculate the fraction of hexane molecules that reside in the vapor above the solution
Calculate the standard change in Gibbs free energy for the following reaction at 25 °C. 2C2H6 (g) + 7O2 (g) -> 4CO2 (g) + 6 H2O (g) ? kJ
3.75g of a protein were dissolved in sufficient water to form 6.75mL of solution, and the osmotic pressure of the solution was found to be 1.88Torr at 25.0c.
Given the values of So given below in J/mol K, calculate the value of ?So in J/K for the combustion of 1 mole of ethane to form carbon dioxide and gaseous water. S (C2H6(g)) = 230.4 S (O2(g)) = 206.0 S (CO2(g)) = 215.5 S (H2O(g)) = 186.3
Consider the reaction of 5.0 moles of CS2 and 3.0 moles of NaOH according to the following reaction 3 CS2 + 6 NaOH -> 2 Na2CS3 + Na2CO3 + 3 H2O.
what volume of 420 ml of hydrogen occupy if the temperature is raised from 0 C to 95 C?
when hydrochloric acid comes in contact with potassium permanganate, what dangerous chemical is released?
Calculate the density of N2 at STP a)using the ideal gas law and b) using the molar volume and molar mass of N2
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