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  • product of reaction between na and at2?

    Predict the products of the reaction between sodium metal (Na) and astatine (At2)

    2Na (s) + At2 (s) -->

    1 AnswerChemistry10 years ago

  • indicate which of the following anions is larger?

    indicate which of the following anions is larger

    Te^2- or Se^2-

    2 AnswersChemistry10 years ago

  • standard enthalpy of formation problem?

    I understand that delta H=products-reactants but don't know how to set this up to get the answer. Please help!

    You are given the following data

    H2(g)-->2H(g) standard delta H= 436.4 kJ/mol

    Br2(g)-->2Br(g) standard delta H= 192.5 kJ/mol

    H2(g)+Br2(g)-->2HBr(g) standard delta H= -72.4 kJ/mol

    Calculate standard delta H for the reaction

    H(g)+Br(g)-->HBr(g)

    3 AnswersChemistry10 years ago

  • heat of combustion problem?

    Please help me figure out how to do this, don't even know where to start!

    Calculate the heat of combustion for the following reactions. Use the standard enthalpies of formation.

    a) C2H4(g)+3O2(g)-->2CO2(g)+2H2O(l)

    b) 2H2S(g)+3O2(g)-->2H2O(l)+2SO2(g)

    1 AnswerChemistry10 years ago