Author: Anonymous

How is blood pressure reduced in cardiogenic shock?

Which figure best represents what will happen when Pb(NO3)2(aq) is treated with an excess of NaCl(aq) and forms PbCl2(s)? Water molecules are omitted for clarity.

What is the percent composition by mass of carbon in a 2.55 g sample of propanol, CH3CH2CH2OH?  The molar mass of propanol is 60.09 g/mol.   

An initial state before the reaction of CH4 and Cl2 is shown in the figure. CH4(g) + 4Cl2(g) → CCl4(g) + 4HCl(g) Based on the balanced equation and the figure, what is the limiting reactant?  

What is the oxidation number of nitrogen in the nitrate ion?   

In which compound is the percent composition by mass of nitrogen the highest?    

Of the substances below, which will hydrogen bond with water?   

For the reduction of silver with hydrogen: 2Ag+(aq) + H2(g) → 2H+(aq) + 2Ag(s) Given the thermodynamic data in the table, what is the standard change in Gibbs free energy for this reaction at 298 K?   ΔHfo  (kJ/mol) So (J/mol∙K) Ag+(aq) 105.58 72.68 Ag(s) 0 42.55 H2(g) 0 130.68 H+(aq) 0 0  

The gases: F2, H2, N2, and O2 at STP are represented in the plot. Which gas corresponds to curve II?   

What is the pH of a buffer made by combining 45.0 mL of 0.150 M nitrous acid and 20.0 mL of 0.175 M sodium nitrite? The Ka of nitrous acid, HNO2, is 4.5×10–4.