CH-862
The mole
Chemistry · Secondary 3 · Hard · The mole
A student reacts 25.0 cm³ of 0.200 mol/dm³ hydrochloric acid with excess magnesium. Using the mole concept, what volume of hydrogen gas is produced at room temperature and pressure (RTP)?
(1 mol of gas occupies 24.0 dm³ at RTP.)
Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g)
(1 mol of gas occupies 24.0 dm³ at RTP.)
Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g)
- 30 cm³
- 60 cm³
- 120 cm³
- 240 cm³
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