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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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