3 years ago

Snow and ice absorbs much of the Sun's radiant energyTrue or False?

1 answer:

3 0

Answer:

Snow and ice have high albedo – much of the sunlight hitting surfaces covered with snow and ice bounces back. ... Thus, the proportion of Earth's surface that is covered by ice and snow affects how much of the Sun's solar radiation is absorbed, warming the planet, or reflected.

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When sodium metal is added to water, an orange flame is observed on the metal surface. Based on this observation, what can best

pickupchik [31]

All you can conclude is that something must be burning with an orange flame.

Actually, the "something" that must be burning is the hydrogen that is produced when the sodium reacts with the water:

2Na + 2H₂O → 2NaOH + H₂ + heat

So much heat is produced that the hydrogen catches fire and some of the sodium evaporates into the flame.

The electrons in the sodium atoms get "excited" in the flame. When they drop back to a lower energy level, they emit energy in the form of an orange-yellow light.

3 0

4 years ago

Give an example of a homogeneous mixture and an example of a heterogeneous mixture.

natta225 [31]

Answer:

Homogeneous: 1 phase, heterogeneous 2 or + phases

Explanation:

Homogeneous mixture: water + vinegar

water + ethyl alcohol

Heterogeneous mixture: water + oil.

6 0

4 years ago