HELP!! How many moles of hydrogen gas will be produced if you start with 2.5 moles of magnesium and an excess of hydrochloric acid given the following balanced chemical reaction:
Mg+2HCl -> MgCl2+H2

A. 2.5 moles
B. 1.25 moles
C. 7.5 moles
D. 5.0 moles

Which statements are true about electrolysis? check all that apply. electrolysis requires an acid be present. electrolysis is described by two half-reactions. electrolysis is not an industrial process. electrolysis results in commercially valuable products. electrolysis involves the transfer of electrons. reduction results in the loss of electrons. oxidation results in the loss of electrons.

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

Fossil fuels are organic compounds that are made from