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The common Eastern mole, a mammal, typically has a mass of 78 g, which corresponds to about 7.8 moles of atoms. (A mole of atoms is 6.02 × 10^23 atoms. In atomic mass units (u), what is the average mass of atoms in the common Eastern mole?
If both enzymes catalyze their reaction with similar rates, explain why the hydrolysis of the starch molecule is accelerated when both enzymes act together.
The precipitate that forms in the qualitative analysis of the chloride ions is AgCl. Calculate the mass of AgCl that should be produced when an excess of AgNO3 is reacted with 0.1900 g of [Co(NH3)5Cl]Cl2.
An aqueous solution is 13.0% by mass ethanol, CH3CH2OH, and has a density of 0.978 g/mL. The molality of ethanol in the solution is?
Calculate the maximum number of milligrams of H2O that can possibly be extracted from 1.00g of tetraphenylarsonium chloride dihydrate
electrons having this speed would need to be treated as waves in atoms because the wavelength is on the order of the size of atoms.
An unknown amount of magnesium metal reacts with 100.0 mL 0f 0.100M aqueous hydrochloric acid. The final solution is acidic, and titrated to an endpoint using 0.150 M aqueous sodium hydroxide.
would be decomposed by a complete reaction with one drop of water? Assume that 1 drop ~ 0.05 mL. If you started with 0.4 g of trityl fluoborate, how much of it would have been left?
A physiological saline solution contains 154 mEq/L each of Na+ and Cl-. How many moles of Na+ are in 1.00L of the saline solution?
Calculate the pH resulting from mixing 15.00 mL of 0.800 M HIO3 (pKa=0.77) with 45.00 mL of 0.0200 M NaOH.
Define the terms exothermic and endothermic. In a calorimetric experiment, how does one determine whether a reaction is one or the other?
Using active extraction (changing the polarity) and a gravity filtration to remove a component, describe how you would obtain pure naphthoic acid from this mixture.
A 0.456 gram sample of an unknown monoprotic acid (lets call it HZ) was dissolved in some water . Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH.
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