Copper wire is sold in spools according to the gauge number of the wire. The gauge number refers to the diameter of the wire. Determine the number of meters that are present in a 10 lb spool of 12-gauge copper wire. (Copper has a density of 8.96 g/cm3. A 12-gauge wire has a diameter of 0.0808 in.) How many copper atoms are present in this length of wire?

Q: Calcium chloride is 36.11% calcium. How many grams of calcium are present in 2.55 x 103 g of calcium…

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Q: A solid circular cone made of pure platinum (density = 21.45 g/cm3) has a diameter of 2.75 cm and a…

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Q: A 1-carat diamond is pure crystaline carbon and has a mass of 0.200 g.Which contains more carbon…

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Q: A 3.000 g sample of a gaseous compound was found to contain 2.560 g of carbon and  0.440 g of…

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Q: 22. A 56.4 g sample of a compound with a molecular mass of 210 u was found to be composed of 12.35 g…

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Q: White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm³. How many…

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Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

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Q: A certain organic compound has the formula C9H11O2.  A sample of this compound weighs 85.88 grams.…

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Q: A chemist has one mole of an unknown molecule. The mass of this sample is 184.1 grams. After doing…

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Q: The density of solid Fe is 7.87 g/cm3. How many atoms are present per cubic centimeter (cm3) of Fe?

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.