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Anuta_ua [19.1K]
3 years ago
11

Please helpsjejhejejejehj​

Chemistry
1 answer:
lilavasa [31]3 years ago
4 0

Answer:

oh i know play fortnite

Explanation:

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What are the observed effects of sleep deprivation on leptin and ghrelin?
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Answer:

Lack of sleep increases hunger hormone ghrelin and decreases the satiety hormone leptin which may help explain the association between inadequate sleep and overweight.

Explanation:

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3 years ago
In the lab you react 2.0 g of Na2CO3 with enough CaCl2. According to the reaction Na2CO3 + CaCl2 -> CaCO3 + 2NaCl How much Ca
vlada-n [284]

Answer:

1.89 g CaCO₃

Explanation:

You will have to use stoichiometry for this question.  First, look at the chemical equation.

Na₂CO₃  +  CaCl₂  ==>  2 NaCl  +  CaCO₃

From the above equation, you can see that for one mole of Na₂CO₃, you will produce one mole of CaCO₃.  This means that however many moles of Na₂CO₃ you have in the beginning, you will have the same amount of moles  of CaCO₃, theoretically speaking.

So, convert grams to moles.  You should get 0.0189 mol Na₂CO₃.  This means that you will get 0.0189 mol CaCO₃.  I'm not sure what units you want the answer in, but I'm going to give it in grams.  Convert moles to grams.  Your answer should be 1.89 g.

3 0
3 years ago
Which particle builds a static electric charge when it is transferred from one object to another?
murzikaleks [220]
The answer would be, "Electrons".
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3 years ago
The mass of 100cm3 of water is 100 g. Use the formula to calculate its density.
yanalaym [24]

Answer:

It should be 1 g/cm3. Hope this helpd!

4 0
3 years ago
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Explain how particles move before during and after melting
Aleksandr-060686 [28]

Answer:

Particles would move more freely, while still staying close together depending on the shape of the liquid

Explanation:

Melting is the process of going from a solid to a liquid due to the increase in heat/energy. This increase in heat/energy increases the speed at which the atoms within the object moves. Lets say we had an ice cube. While it is a cube, the particles inside the cube are slow and compact, staying close together.

When enough energy is gained, this makes the particles begin to move faster, gaining heat and energy which results in the ice cube melting and moving more freely than normal.

3 0
2 years ago
Read 2 more answers
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