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

question 161

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 0.9933 bar, what mass of hydrogen is produced? A possibly useful table of water vapour pressures is provided below. Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g) T (°C) P (bar)
20 0.023398
25 0.031704
30 0.042477

• 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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Definitions:

Coupon Rate

The annual interest rate paid by a bond's issuer to its holders, expressed as a percentage of the bond's face value.

Tax Shield

A reduction in taxable income for individuals or corporations achieved through claiming allowable deductions such as mortgage interest, medical expenses, amortization, and depreciation.

Debt-Equity

A financial figure indicating the comparative use of shareholders' equity and debt in asset finance.

All Equity

Pertains to the total shareholder equity in a company, encompassing all issued equity capital, including common and preferred shares, retained earnings, and additional paid-in capital.