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Silicon has three stable isotopes. The most common form is 28Si at 92.2% natural abundance with a mass of 27.9769 amu, 29Si has a 4.7% natural abundance, while 30Si has a natural abundance of 3.1% and a mass of 29.9738 amu. Calculate the mass of the 29Si isotope.

Silicon has three stable isotopes. The most common form is ²⁸Si at 92.2% natural abundance with a mass of 27.9769 amu, ²⁹Si has a 4.7% natural abundance, while ³⁰Si has a natural abundance of 3.1% and a mass of 29.9738 amu. Calculate the mass of the ²⁹Si isotope.