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dolphi86 [110]
2 years ago
14

About how long does it take for the moon to cycle through all its different observable shapes? (2 points)

Chemistry
1 answer:
malfutka [58]2 years ago
4 0

Answer:

A month

Explanation:

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When you add energy to matter the particles move
snow_tiger [21]

Answer:

Energy added: particles move faster and further apart, and matter expands (state changes from solid to liquid to gas). Energy removed: particles move slower and closer together, and matter contracts (state changes from gas to liquid to solid).

Explanation:

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3 years ago
Why do you think there was a rush to mass-produce penicillin around the time of World War II?
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penicillin could protect mice against infection from deadly Streptococci.

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An example of a physical property of an element is the element’s ability to(1) react with an acid(2) react with oxygen(3) form a
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<span>4: Form An Aqueous Solution 

This is the only answer that can be observed without testing gear and with the naked eye.... Hope I helped ^-^</span>
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How many atoms are equal to 1.5 moles of hellium
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3 years ago
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Determine how much energy is needed to change 50 g of liquid water at 100°C to steam.
marin [14]

Answer:

Q=113,000J

Explanation:

Hello there!

In this case, since the vaporization process is carried out in order to turn a liquid into a gas due to the addition of heat, we can use the following heat equation involving the heat of vaporization of water or any other substance:

Q=m*\Delta _{vap}H

Thus, since this heat of vaporization for water is 2259.36 J/g, we plug in this amount to obtain the total energy for this process.

Q=50*2259.36 J/g\\\\Q=113,000J

Which is positive due to the necessity of heat.

Regards!

5 0
3 years ago
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