Reaction Equation ∆H (kJ/mol) -450 Reaction 1: Mg(s) + 2HCl(aq) — MgCl2(aq) + Hz(9) Reaction 2: MgO(s) + 2HCl(aq) — MgCl2(aq) + H2O(1) Reaction 3: H2(g) + 220,(9) — H2O(1) -81 -286 Reaction(s)_released heat. W
Reaction_released the most heat per mole of reactant​

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3 -> a2cr(no3)3 + a3ag2so4

Aman applies a force of 500n to push a truck 100m down the street how much does he do?