Question

test 2, page 4
problems: solve the problem; show your work in the space provided and circle the answer. express the answer using proper significant figures and units. refer to the provided periodic table as needed.

1. find the molecular mass of no₂.
2. find the molar mass of agno₃.

Explanation:

Step1: Find atomic masses

From the periodic table:

• Atomic mass of \( N = 14.01\space g/mol\)
• Atomic mass of \( O = 16.00\space g/mol\)
• Atomic mass of \( Ag = 107.9\space g/mol\)

Step2: Calculate molecular mass of \(NO_2\)

Molecular mass \(M_{NO_2}=1\times14.01 + 2\times16.00\)

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Step3: Calculate molar mass of \(AgNO_3\)

Molar mass \(M_{AgNO_3}=1\times107.9+1\times14.01 + 3\times16.00\)

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Answer:

• Molecular mass of \(NO_2\): \(46.01\space g/mol\)
• Molar mass of \(AgNO_3\): \(169.91\space g/mol\)