Question

fe(no₃)₃
express your answer in atomic mass units to two decimal places.
formula mass = 241.88 amu
previous answers
correct
the formula mass of fe(no₃)₃ is
formula mass = 55.85 amu + 3(14.01 amu) + 9(16.00 amu)
= 241.88 amu
part d
c₇h₁₆
express your answer in atomic mass units to two decimal places.
formula mass = amu

Explanation:

Step1: Calculate the mass of carbon atoms

The atomic mass of carbon (\(C\)) is \(12.01\) amu. There are \(7\) carbon atoms in \(C_{7}H_{16}\). So the total mass of carbon atoms is \(7\times12.01\) amu.

$$7\times12.01 = 84.07$$

Step2: Calculate the mass of hydrogen atoms

The atomic mass of hydrogen (\(H\)) is \(1.008\) amu. There are \(16\) hydrogen atoms in \(C_{7}H_{16}\). So the total mass of hydrogen atoms is \(16\times1.008\) amu.

$$16\times1.008=16.128$$

Step3: Calculate the formula mass

The formula mass of \(C_{7}H_{16}\) is the sum of the mass of carbon atoms and hydrogen atoms.

$$84.07 + 16.128=100.198\approx100.20$$

Answer:

\(100.20\) amu