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Mademuasel [1]
3 years ago
8

You are given a small bar of an unknown metal. You find the density of the metal to be 10.5 g/cm3. An X-ray diffraction experime

nt measures the edge of the unit cell as 409 pm. Assuming that the metal crystallizes in a face-centered lattice, what is the metal most likely to be?
A) Pt
B) Pb
C) Rh
D) Ag
E) None of these

Chemistry
2 answers:
Nat2105 [25]3 years ago
6 0

Answer:

D) Silver.

Explanation:

The density and the structure fit the metal silver  whose unit cell edge is 407  pm

Artemon [7]3 years ago
5 0

Answer:

Ag

Explanation:

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<u>Answer:</u> The temperature at which the food will cook is 219.14°C

<u>Explanation:</u>

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Mathematically,

\frac{P_1}{T_1}=\frac{P_2}{T_2}

where,

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P_2\text{ and }T_2 are the final pressure and temperature of the gas.

We are given:

P_1=14.7psi\\T_1=273K\\P_2=(14.7+11.8)psi=26.5psi\\T_2=?

Putting values in above equation, we get:

\frac{14.7psi}{273K}=\frac{26.5psi}{T_2}\\\\T_2=\frac{26.5\times 273}{14.7}=492.14K

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

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492.14=T(^oC)+273\\\\T(^oC)=219.14^oC

Hence, the temperature at which the food will cook is 219.14°C

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3 years ago
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The given formula for heat, Q=mc(Tf-Ti), is the best way to solve such problems with changes in temperature. It can be said that m is the mass of the substance. C is the specific heat of the substance. The term (Tf-Ti) is the change in temperature.

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