Galliunm chloride is formed bb the reaction of 2.6 l of a 1.44 m solution of hcl according to the following equation: 2ga +
6hcl ? 2gacl3 + 3h2
(a) outline the steps neccessary to determine the number of moles and mass of h2
(b)perform the calculations outlined

3.8 g H₂

Explanation:

(a)

1. Calculate the moles of HCl that react.

2. Convert the moles of HCl into moles of H₂ using the molar ratio

3. Convert moles of H₂ into mass using the molecular weight (2.02 g/mol)

(b)

1. Calculate the moles of HCl that react.

(1.44mol/L)(2.6L) = 3.744mol HCl

2. Convert the moles of HCl into moles of H₂ using the molar ratio

(3.744mol HCl)(3H₂/6HCl) = 1.872 mol H₂

3. Convert moles of H₂ into mass using the molecular weight (2.02 g/mol)

(1.872 mol H₂)(2.02 g/mol) = 3.8 g H₂

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.