Monel metal is a corrosion-resistant copper-nickel alloy, Ask an Expert

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Monel metal is a corrosion-resistant copper-nickel alloy used in the electronics industry. A particular alloy with a density of 8.80 g/ cm^3. and containing 0.074 % Si by mass is used to make a rectangular plate that is 15.0 cm long, 12.5 cm wide, and 4.50 mm thick and has a 2.50 cm diameter hole drilled through its center such that the height of the hole is 4.50 mm. The silicon in the plate is a mixture of naturally occurring isotopes. One of the those isotopes is silicon-30, which has an atomic mass of 29.97376 amu and a percent natural abundance of 3.10 %. How many silicon-30 atoms are found in this plate?

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