B. Use Hess's law and the following equations to calculate the A Hreaction for the reaction C3H8(9) + 502(9) + 3C02(9) + 4H2O(). (Show your work.) (4 points)
• 3C(s) + 4H2(9) → C3Hg(9)
AH = -103.85 kJ
• 3C(s) + 302(g) + 3C02(9)
AH=-1186.5 kJ
• 4H2(9) +202(9) + 4H2O()
AH=-1143.32 kJ

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as