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How many kilojoules of heat are absorbed when 40.6 of mgo is decomposed into mg and O2 at constant pressure?
How many neutrons are there in an atom of lead whose mass number is 208? A) 82 C) 208 E) none of them B) 126 D) 290 8. Atoms of the same element with different mass numbers are called A) ions. C) allotropes. E) isotopes. B) neutrons. D) chemical f..
Use the appropriate values of Ksp and Kf to find the equilibrium constant for the following reaction: FeS(s)+6CN^-(aq)->
Ethanol is a common laboratory solvent and has a density of 0.789 g/mL
Study the structures of the chlorophylls and carotenoids and predict the relative polarity of each set of pigments below
Draw the structure of the product that is formed when the compound shown below undergoes an elimination reaction with NaOCH3
What was the concentration of the unknown HClO4 solution? The neutralization reaction is: HClO4(aq)+NaOH(aq)==>H2O(l)+NaClO4(aq)
What is the total pressure of a mixture of gases made up of CO2, O2, and H2 if the partial pressures are 2.2atm, 400mmHg and 112kPa respectively.
What is the difference between an amino acid and a protein? How does this difference in structure affect biological function?
The titration of 0.50 M NH3 with 0.50 M HCL results in a final endpoint and a concentration of 0.25 M NH4 Cl with essentially all the NH3 complete conversion to NH4^
Write a balanced (a) molecular, (b) overall ionic, and (c) net ionic equation for the reaction between an aqueous solution of phosphoric acid, H3PO4 (aq) , and an aqueous solution of sodium hydroxide. The products are sodium phosphate and water
The silver chloride wasn't completely dry when the final weighing was made. The unknown sample contained traces of moisture when it was weighed. The precipitated silver chloride was exposed to excessive light while it was drying.
if 5.00 g of each NH3, O2, and CH4 are reacted, what mass of HCN will be produced, assuming 100% yield
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