Physics
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Calculate the number of atoms in a 3.0 cm × 4.0 cm × 5.0 cm right rectangular prism of copper.
A spacecraft on a mission to explore a distant planet discovers a solid mineral with a mass density of 2300 kg/m 3. The analysis reveals that the mineral's number density is 6.25 × 10 28 atoms/m3. Find the atomic mass number of the element comprising this mineral.
A chemist is studying a sample of liquid ethanol (C2H5OH) which has a molecular mass of 46 u. If the chemist has a 1.4 liter sample of this ethanol, how many protons are present within this volume?