The Following Reaction Is Used to Generate Hydrogen Gas in the Laboratory.If

question 103

Multiple Choice

The following reaction is used to generate hydrogen gas in the laboratory.If 243 mL of gas is collected at 25°C and has a total pressure of 745 mm Hg,what mass of hydrogen is produced? A possibly useful table of water vapor pressures is provided below. Mg(s) + 2 HCl(aq) → MgCl₂(aq) + H₂(g) T (°C) P (mm Hg)
20 17.55
25 23.78
30 31.86

• A) 0.0196 g H₂
• B) 0.0717 g H₂
• C) 0.0190 g H₂
• D) 0.0144 g H₂
• E) 0.0449 g H₂

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