Lead reacts with hydrochloric acid to produce lead (II) chloride and hydrogen gas. How many moles of HCl are needed to completely react with 44.9 grams of Pb?

Pb (s) + 2 HCl (aq)  → PbCl2 (s) + H2 (g)

0.4334 moles

Step-by-step explanation

Pb_(s) + 2 HCl_(aq)  → PbCl_2(s) + H_2 (g)

First calculate moles of Pb

Moles = ?Molar MassMass??

Moles of Pb = ?207.244.9?? = 0.2167

Use mole ratio to determine moles of HCl

1 mole of Pb reacts with 2 moles HCl to produce 1 mole of PbCl₂ and 1 mole of H₂

Mole of Pb = 0.2167 moles

Mole of HCl = ?12∗0.2167?? = 0.4334 moles

So moles of HCl needed = 0.4334 moles