A Careless Student Who Was Instructed to Combine 4

question 37

Multiple Choice

A careless student who was instructed to combine 4.00 g of sodium sulfate with a solution containing 10.0 g of H₂SO₄ (98.08 g/mol) instead combined 4.00 g of sodium sulfide (78.05 g/mol) with the acid. The acid reacted with the sodium sulfide, according to the following reaction, to produce the foul-smelling and highly toxic hydrogen sulfide gas. How many moles of hydrogen sulfide gas were produced? Na₂S(s) + H₂SO₄(aq)  Na₂SO₄(aq) + H₂S(g)

• A) 0.0510 mol
• B) 0.102 mol
• C) 0.0512 mol
• D) 0.0257 mol
• E) 0.0315 mol

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Definitions:

Oceanic Plateaus

Large, elevated areas of the ocean floor, typically formed by volcanism and featuring relatively flat regions at depth.

Basaltic Volcanism

Volcanic activity characterized by the eruption of basalt, a type of dark, fine-grained igneous rock.

Youngest Seafloor

Those parts of the oceanic crust that have most recently formed at mid-ocean ridges due to seafloor spreading.

Deepest Seafloor

The deepest parts of the ocean floor, often found in trenches and abyssal plains, with the Mariana Trench being the deepest known point.