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(a) What are "valence electrons"?
(b) What are "core electrons"?
(c) What does each box in an orbital diagram represent?
(d) What quantity is represented by the half arrows in an orbital diagram?
.1500g of an unknown sample was passed through a column of amberlite-ir-200 resin and titrated with .2050m naoh. if
write an equation for which component of the phosphate buffer (H2PO4-/ HPO4^2-) reacts when HCl is added. Do the same for NaOH.
Cosidering the solubility of the nylon across the dirent solvents, what conclusion could be made about nylon solubility based on the structure of nylon and the structure of the solvents
if a chemical reaction a b --gt c d is endothermic what is the sign of deltah for the reaction? would the temperature
Write the overall balanced equation of potassium permanganate with sodium oxalate in acidic solution using the half reaction method. Indicate the oxidation states for each species as well as the oxidizing agent and reducing agent.
Identify the sets of quantum numbers that describe all the electrons in a neutral beryllium atom, \rm Be. Each set is ordered
How much energy would be required to melt 48 g of HCl at its melting point of -110.8C? Hfus for HCl is 14.2 cal/g and Hvap for HCl is 98.7 cal/g.
A metallic element, M, reacts vigorously with water to form a solution of M(OH)2. If M is in Period 6, what is the ground-state electron configuration of the atom
compute the molecular formula of ch3cooh the percent composition of acetic acid is 39.99 c and 6.73 h. the remainder of
Problem- A student collected the following data while using procedure described in this module: 27.13mL of 1.00x10^-2 M EDTA solution was required to reach the ErioT end point for titration of 25.00mL of the sample water.
what is the partial pressure of nitrogen in a container that contains 3.96mol of oxygen
What mass of rm NaOH is needed to precipitate the rm Cd^{2+} ions from 35.0 mL of 0.540 M rm Cd(NO_3)_2 solution?
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