human
When the equation Mg(s)+HCl(aq)—-> MgCl2(aq)+H2(g) is balanced, what is the coefficient for HCl?
gpt
2
Explanation: In a balanced chemical equation, the coefficients of reactants and products must be equal. In this case, the coefficient for HCl is 2, indicating that two moles of HCl are required to react with one mole of Mg to produce one mole of MgCl2 and one mole of H2.