A 0.250-\ m g sample of a magnesium-aluminum alloy dissolves completely in an ex

Question

A 0.250- m g sample of a magnesium-aluminum alloy dissolves completely in an excess of m HCl(aq). When the liberated m H_2(g) is collected over water at 29 ^circ m C and 752 m torr, the volume is found to be 301mL . The vapor pressure of water at 29 ^circ m C is 30.0 m torr. Taking into account the vapor pressure of water, how many moles of hydrogen gas, n, are present in 301mL at 752 m torr and 29 ^circ m C? The value of the gas constant R is 0.08206 m Lcdot atm/(mol cdot K). You may also find the conversion factors m 1~atm=760~torr and T_{ m K}= T_{ m C}+273 useful.

Explanation / Answer

Mg + 2 HCl ? MgCl2 + H2 (x g Mg) / (24.31 g Mg/mol) x (1/1) = 0.0411x

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.