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mart [117]
4 years ago
12

Elements, Compounds, and Mixtures help please. Use the picture.

Chemistry
1 answer:
trasher [3.6K]4 years ago
6 0
1 compound 2.mixture 3mixture      4mixture        5.element  6.compund s
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Calculate the temperature change in the water upon complete melting of the ice. Hint: Determine how much heat is absorbed by the
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Calcium has a cubic closest packed structure as a solid. Assuming that calcium has an atomic radius of 197 pm, calculate the den
NISA [10]

Answer:

\rho=1.54\ g/cm^3

Explanation:

The expression for density is:

\rho=\frac {Z\times M}{N_a\times {{(Edge\ length)}^3}}

N_a=6.023\times 10^{23}\ {mol}^{-1}

M is molar mass of Calcium = 40.078 g/mol

For cubic closest packed structure , Z= 4

\rho is the density

Radius = 197 pm = 1.97\times 10^{-8}\ cm

Also, for fcc, Edge\ length=2\sqrt{2}\times radius=2\sqrt{2}\times 1.97\times 10^{-8}\ cm=5.572\times 10^{-8}\ cm

Thus,  

\rho=\frac{4\times \:40.078}{6.023\times \:10^{23}\times \left(5.572\times 10^{-8}\right)^3}\ g/cm^3

\rho=\frac{160.312}{10^{23}\times \:6.023\left(10^{-8}\times \:5.572\right)^3}\ g/cm^3

\rho=\frac{160.312}{10^{23}\times \:1.04195E-21}\ g/cm^3

\rho=\frac{160.312}{104.19483}\ g/cm^3

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