Answer
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Step 1:I'll solve this problem step by step, following the specified LaTeX formatting guidelines:
Step 2:: Identify the elements in the molecule
The molecule is helium gas (He₂), which consists of two helium atoms.
Step 3:: Determine the atomic mass of helium
m_{He} = 4.003 \text{ g/mol}
The atomic mass of helium (He) can be found on the periodic table:
Step 4:: Calculate the molar mass of He₂
m_{He_{2}} = 2 \times m_{He} = 2 \times 4.003 \text{ g/mol}
Since the molecule contains two helium atoms, multiply the atomic mass by 2:
Step 5:: Perform the calculation
m_{He_{2}} = 8.006 \text{ g/mol}
Final Answer
The molar mass of helium gas (He₂) is 8.006 \text{ g/mol}.
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