1. Combine equations 1,2,3 to obtain equation 4. Then provide an equation for calculating the heat of reaction in kJ/mol. Equation 1: MgO(s)+2HCl(aq)--->MgCl2(aq)+H2O (l)

Equation 2: Mg(s)+2HCl(aq)>MgCl2(aq)+H2(g)
Equation 3: H2(g)+1/2O2(g)>H2O(l)

Identify the missing numbers below to show the result of multiplying the numbers (1.6 × 10-19)(5.0 × 106) = c × 10d

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.