Energy is transferred from the sun to Earth mainly by

Chemistry

1 answer:

expeople1 [14]2 years ago

5 0

Answer:

electromagnetic waves

Explanation:

Radiation is the transfer of heat energy through space. Most of them are sent through electromagnetic waves.

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Explain the changes that take place at the molecular level when a substance is superheated or supercooled ?

Katyanochek1 [597]

Only gas or vapor can be superheated. Use water as an example. Water at sea level boils at 212 degrees F. When heated to 212 degrees F, the molecules that make up water are moving at a high enough speed that they overcome the air pressure above the water. And for supercooled only liquids or solids can be supercooled for example Liquid water at sea level has a saturation (boiling) temperature of 212 degrees F. If we were to add heat to the saturated water, it would first boil away with no change in temperature (remember latent heat?) and then become superheated if still more heat were added to the vapor (steam) after it had all turned to a vapor.

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3 years ago

Chromium can form either a 2+ or a 3+ ion. what is the stock name for the chromium ion with the 3+ charge?

koban [17]

Chromium (III)

Gradpionts Answer

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3 years ago

Explain how the heat and phase changes affects the environment? Give examples. (5-7 sentences)

NeX [460]

Energy is required to change the phase of a substance, such as the energy to break the bonds between molecules in a block of ice so it may melt.
During a phase change energy my be added or subtracted from a system, but the temperature will not change. The temperature will change only when the phase change has completed. No temperature change occurs from heat transfer if ice melts and becomes liquid water (i.e., during a phase change). For example, consider water dripping from icicles melting on a roof warmed by the Sun. Conversely, water freezes in an ice tray cooled by lower-temperature surroundings. Energy is required to melt a solid because the cohesive bonds between the molecules in the solid must be broken apart so that the molecules can move around at comparable kinetic energies; thus, there is no rise in temperature.

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2 years ago

In a particular experiment, 2.50-g samples of each reagent are reacted. The theoretical yield of lithium nitride is ________ g.

Neporo4naja [7]

Answer:

4.18 g

Explanation:

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$