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GarryVolchara [31]
3 years ago
13

Quartz (SiO2) is a _____.

Chemistry
1 answer:
Setler [38]3 years ago
8 0

Quartz is a compound

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The pre-exponential constant and activation energy for the diffusion of iron in cobalt are 1.7 x 10-5 m2/s and 273,300 J/mol, re
Kitty [74]

<u>Answer:</u> The temperature of the system will be 1622 K

<u>Explanation:</u>

The equation relating the pre-exponential factor and activation energy follows:

\log D=\log D_o-\frac{E_a}{2.303RT}

where,

D = diffusion coefficient = 2.7\times 10^{-14}m^2/s

D_o = pre-exponential constant = 1.7\times 10^{-5}m^2/s

E_a = activation energy of iron in cobalt = 273,300 J/mol

R = Gas constant = 8.314 J/mol.K

T = temperature = ?

Putting values in above equation, we get:

\log (2.7\times 10^{-14})=\log (1.7\times 10^{-5})-\frac{273,300}{2.303\times 8.314\times T}\\\\T=1622K

Hence, the temperature of the system will be 1622 K

8 0
3 years ago
What are the properties of CuF2?
ch4aika [34]
Compound Formula CuF2
Appearance White crystalline powder
Melting Point 836° C (1,537° F)
Boiling Point 1,676° C (3,049° F)
Density 4.23 g/cm3

Hope I helped
7 0
3 years ago
The gravitational pull of the Sun affects which of the following properties of the planets in our solar system?
ki77a [65]
Speed and shape of orbit
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3 years ago
True and false. if false explain
Sonja [21]

Answer:

The boiling point of water, or any liquid, varies according to the surrounding atmospheric pressure. ... With that much less pressure, you don't need to apply as much heat to push vapor pressure beyond the surrounding atmospheric pressure – in other words, water boils at a lower temperature.

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3 years ago
A sample of a compound contains 24 grams of carbon and 64 grams of oxygen. What
djyliett [7]

Answer:

CO2

Explanation:

it's the simplest whole number ratio of atoms of each element in the compound.

5 0
3 years ago
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