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4 years ago

Different rocks have______ melting points

Chemistry

1 answer:

weeeeeb [17]4 years ago

5 0

Answer:

<em>Different rocks have high, medium, and low melting points.</em>

Explanation:

There is a considerable range of melting temperatures for different compositions of magma. All the silicates are molten at about 1200°C (when a part of rock) and all are solid when cooled to about 600°C. Often the silicates are grouped as high, medium and low-melting point solids.

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3 years ago

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What is the wavelength, in nm, of radiation which has an energy if 3.371 x 10^-19 joules per photon?

mr_godi [17]

Answer:

The correct option is:

D) 589.3 nm

Explanation:

Energy of one photon = $3.371\times10^{-19}J$

$Energy=\frac{hc}{\lambda}\\\\h=Planck's\:constant=6.626\times10^{-34}J/s\\c=speed\:of\:light=3\times10^{8}m/s\\\lambda=wavelength\:of\:radiation\\\\\lambda=\frac{hc}{Energy}=\frac{6.626\times10^{-34}\times3\times10^{8}}{3.371\times10^{-19}}=5.897\times10^{-7}m=589.7nm\\$

Hence, the wavelength (in nm) of radiation is 589.7nm (approximately equal to 589.3nm)

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3 years ago

At room temperature, 20ÁC, water (H2O) is a liquid and oxygen (O2) is a gas. Based on kinetic molecular theory, which answer bes

vaieri [72.5K]

<span>Water molecules have a lower boiling temperature than oxygen molecules, so at room temperature they exist as a liquid rather than a gas.
hope it helps
</span>

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3 years ago

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iogann1982 [59]

2. is point source

3. is non point source

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Different rocks have______ melting points​

Different rocks have______ melting points