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The density of solid nickel (Ni) is 8.90 g/cm^3. How many atoms are present per cubic centimeter (cm^3) of Ni? (Atomic mass of Ni = 58.69 g/mol; Avogadro's number = 6.022 × 10^{23} atoms/mol)
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1. Intro to General Chemistry
Density
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Given two containers, a beaker and a test tube, each containing the same volume of water and an equal mass of iodine dissolved, which container has the higher density of iodine solution?
A
The beaker has a higher density
B
Both have the same density
C
The test tube has a higher density
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Recall that density is defined as mass divided by volume, expressed as \(\rho = \frac{m}{V}\), where \(\rho\) is density, \(m\) is mass, and \(V\) is volume.
Identify the given information: both the beaker and the test tube contain the same volume of water and the same mass of iodine dissolved in that water.
Since the volume of the solution and the mass of iodine are the same in both containers, the total mass and total volume of the iodine solution in each container are identical.
Because density depends only on the ratio of mass to volume, and both containers have equal mass and volume of solution, their densities must be the same.
Therefore, neither container has a higher density; both have the same density of iodine solution.
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