Chemistry

Which amount of surfactant resulted in the greatest amount of airflow? 2 4 Amounts 2 and 4 gave the same airflow.

Match the proper VSEPR shape to each of the following compounds. CS_(2) square v CO_(2) square v SCl_(2) square SO_(4)^2 square v PBr_(3) square v SO_(3)^2 square v CH_(4) square SD_(1) square NH_(3) square v SiF_(4) square

4. Using your data what is the approximate hydronium ion concentration and hydroxide ion concentration in a cup of tea? Which is higher? (Refer back to the chart of pH if you need to.) (4 points)

Why is the aldol condensation to make dibenzalacetone carried out in a mixture of water (with 10% NaOH) and alcohol instead of using just one solvent? Because water keeps the reaction cool and alcohol A adds flavor Because alcohol dissolves organic molecules, and B water dissolves NaOH Because NaOH only works in alcohol, and water C helps the smell Because the reaction only works in pure water or D pure alcohol

2N_(2)O_(5)(aq)arrow 4NO_(2)(aq)+O_(2)(g) Which choice represents the relative rate expression between N_(2)O_(5) and NO_(2) ? 1 Rate=-(1)/(2)(Delta [N_(2)O_(5)])/(Delta t)=(1)/(4)(Delta [NO_(2)])/(Delta t) 2. Rate=(Delta [N_(2)O_(5)])/(Delta t)=(Delta [NO_(2)])/(Delta t) 3 Rate=-(1)/(4)(Delta [N_(2)O_(5)])/(Delta t)=(1)/(2)(Delta [NO_(2)])/(Delta t) 4 Rate=2(Delta [N_(2)O_(5)])/(Delta t)=4(Delta [NO_(2)])/(Delta t)

At high temperatures bromine molecules can dissociate into bromine atoms. For the reaction Br_(2)(g)leftharpoons 2Brcdot (g) K_(p)=2.48times 10^-3 at 1650^circ C A 5.00 L vessel at 1650^circ C is filled with Br_(2)(g) at an initial pressure of 6.00 atm and allowed to come to equilibrium. What will be the pressure (in atm) of Brcdot (g) at equilibrium?

Suppose you want to calculate the volume of 32.9 g of nitrogen gas at 298 .15 K and 1 atm. What information do you need to calculate the volume of nitrogen? mass of nitrogen gas molar mass of nitrogen gas gas constant pressure of nitrogen gas

The boiling point of bromine is 59^circ C Which of the following best predicts the boiling point of iodine monochloride, a polar compound? Higher than 59^circ C because dipole-dipole interactions in iodine monochloride are stronger than dispersion forces in bromine. Lower than 59^circ C because ionic bonding in bromine is stronger than covalent bonding in iodine monochloride. Lower than 59^circ C because dipole-dipole interactions in iodine monochloride are weaker than in bromine. Higher than 59^circ C because ionic bonding in iodine monochloride is stronger than H-bonding in bromine.

2N_(2)O_(5)(aq)arrow 4NO_(2)(aq)+O_(2)(g) In a previous step, you calculated the rate of disappearance of N_(2)O_(5) at 5.0times 10-4M/s What is the rate of appearance of NO_(2) in the same timeframe? Rate=-(1)/(2)(Delta [N_(2)O_(5)])/(Delta t)=(1)/(4)(Delta [NO_(2)])/(Delta t) Rate_(O_(2))=[?]times 10^[?]M/s Coefficient (green) Exponent (yellow)

4PH_(3)arrow P_(4)+6H_(2) In a previous step, you calculated I the rate of disappearance of PH_(3) at 6.67times 10-3M/s What is the rate of appearance of P_(4) in the same time frame? Rate=-(1)/(4)(Delta [PH_(3)])/(Delta t)=(Delta [P_(4)])/(Delta t) Rate_(P_(4))=[?]times 10^[?]M/s Coefficient (green) Exponent (yellow)