Question

the aluminum sample is dissolved in hcl and h2 gas is produced and collected over water. the volume of h2 gas produced is 73.8 ml. what is the volume of gas, in liters? ***do not enter units with your answer. do not use scientific notation. correct significant figures are required\.\***

Answer 1

The volume of gas is 62.2 L

The balance chemical equation is

2Al + 6 H+ → 2Al3+  + 3H2

n al/nH2 = 2/3

nH2 = 3/2 nAl

nAl = given mass / molar mass = 42/27 = 1.56 mol

nH2 = 3 × 1.56/2 = 2.34 mol

so, accordingly to ideal generation PV = nRT

V = nRT/P

T = 30 degree celsius = 303K

V = 62.2 L

The amount of occupied three-dimensional space is measured in volume. It is typically expressed quantitatively using SI-derived units (such the cubic meter and liter) as well as other imperial or US-standard units (such as the gallon, quart, cubic inch). By the definition of length, volume and length are connected (cubed). The volume of a container is commonly understood to be its carrying capacity, or the amount of fluid (liquid or gas) that it could hold, as opposed to how much actual space the container occupies.

In the past, standardized containers were used to calculate volume first, followed by naturally occurring vessels of a similar shape. A number of simple three-dimensional shapes have volumes that can be calculated using mathematical methods.

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