Aqueous Hydrochloric Acid Reacts with Magnesium to Produce Hydrogen Gas

question 31

Multiple Choice

Aqueous hydrochloric acid reacts with magnesium to produce hydrogen gas according to the balanced equation below. 2H⁺(aq) + Mg(s) → Mg²⁺(aq) + H₂(g) .If 250.0 mL of 3.00 M HCl is combined with 9.92 g Mg,what volume of hydrogen gas can be produced? Assume the temperature and pressure of the gas are 25°C and 0.988 atm,respectively.(R = 0.0821 L.atm/mol.K)

• A) 4.60 L
• B) 5.05 L
• C) 9.29 L
• D) 10.1 L
• E) 18.6 L

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Definitions:

Independent

The condition where two variables do not affect or influence each other.

Standard Error

The standard deviation of the sample mean's distribution; a measure of how much a sample mean varies from the true population mean.

Pooled Estimator

A statistical method that combines multiple estimates to produce a better overall estimate.

Variance

The square of the standard deviation, representing the average of the squared differences from the mean, and measures the spread of a data set.