HEL Use Hess's law and the following equations to calculate ΔH for the reaction SO2(g) + NO2(g) SO3(g) + NO(g). (Show your work.)

• SO3(g) SO2(g) + O2(g)

ΔH = –98.4 kJ/mol
• N2(g) + O2(g) NO(g)

ΔH = 90.3 kJ/mol
• NO2(g) N2(g) + O2(g)

ΔH = –33.1 kJ/mol

Which of the following statements concerning the influence of culture on ethnic identity formation is accurate? a. one will reject ethnic identity if cultural stereotypes are encountered. b. if one’s ethnic city is different from the dominant cultural group, then one’s ethnic identity you will become weekend. c. if an the ethnic group is excepted by dominant culture, then ethnic identity formation can be a difficult process. d. similarity to the dominant culture can determine how easy it is for one to except ethnic differences.

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife