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Zn +2HCI→ ZnCI₂ + H₂.

If 0.3 mol Zn used, and HCI is excess, what is volume (dm³) of H₂ formed at RTP?

• 300 dm³

• 22.7 dm³

• 7.2 dm³

• 75.66 dm³

Zn + 2HCI→ ZnCI₂ + H₂.

If 3 mol HCI is used, Zn is in excess, what is amount of H₂ (mol) formed?

• 3 mol

• 1.5 mol

• 6 mol

• 1 mol

Zn + 2HCI → ZnCI₂ + H₂.

If 0.3 mol Zn used, and HCI is excess, what is amount of H₂ formed?

• 0.15 mol

• 0.3 mol

• 0.6 mol

• 1 mol

How many moles of methane gas molecules, CH₄, are in 12 liters of methane at Room temperature and pressure?

• 11.2 moles

• 0.5 moles

• 179.2 moles

• 27.2 moles