Question

8.2 calculate the number of moles of magnesium ribbon added to each flask.
a. 0.3 g/atomic weight of mg (24.3 g/mole)
b. 0.6 g/atomic weight of mg (24.3 g/mole)
c. 1.2 g/atomic weight of mg (24.3 g/mole)

Explanation:

Step1: Calculate moles for part a

Use the formula \(n=\frac{m}{M}\), where \(m = 0.3\space g\) and \(M=24.3\space g/mol\)
\(n=\frac{0.3}{24.3}\approx0.0123\space mol\)

Step2: Calculate moles for part b

Use the formula \(n=\frac{m}{M}\), where \(m = 0.6\space g\) and \(M = 24.3\space g/mol\)
\(n=\frac{0.6}{24.3}\approx0.0247\space mol\)

Step3: Calculate moles for part c

Use the formula \(n=\frac{m}{M}\), where \(m = 1.2\space g\) and \(M=24.3\space g/mol\)
\(n=\frac{1.2}{24.3}\approx0.0494\space mol\)

Answer:

a. \(0.0123\space mol\)
b. \(0.0247\space mol\)
c. \(0.0494\space mol\)