If 3 moles of a compound use 12 J of energy in a reaction, what is the A Hreaction in kJ/mol?
O A. 0.004 kJ/mol
O B. 4 kJ/mol
O C. -4 kJ/mol
O D. -0.004 kJ/mol

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)

What is a property of a double replacement reaction

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.