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sineoko [7]
3 years ago
11

How has earth change during our current era?

Chemistry
1 answer:
stiks02 [169]3 years ago
7 0

Answer: It se

Explanation:

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Which formula represents Carbonic acid
Degger [83]

Answer:

H2CO3 represents carbonic acid

8 0
3 years ago
Classify which compounds will dissolve in water and which ones will not dissolve in water.
vredina [299]

Answer:

Dissolves in water: Acetone, 1-propanol, Methanol

Do not dissolve in water: Hexane, Decane

Explanation:

From the principle that like dissolves like,polar substances will dissolve in polar solutions, while non-polar substances will dissolve in non-polar substances.

Water is a polar solution, therefore, polar substances will dissolve in it.From the given options:

Acetone is a polar molecule, therefore, it will dissolve in water.

1-propanol is a polar molecule, therefore, it will dissolve in water.

Hexane is a non-polar molecule, therefore, it will not dissolve in water.

Methanol is a polar molecule, therefore, it will dissolve in water.

Decane is a non-polar molecule, therefore, it will not dissolve in water

6 0
3 years ago
What must occur for the enthalpy of solution to be negative?
tiny-mole [99]

Answer:

d on edge my guys.

Explanation:

8 0
3 years ago
Compounds can be separated by<br><br> chemical means<br> physical means<br> boiling<br> pressure
Gennadij [26K]
In order to compounds to be serparated, chemical means are needed. For example, if it you want to separate hydrogen and oxygen in the water ,an electric current should flow through it and that is a kind of chemical means(it is related to the chemical properties of the elements .)
While ,if there is a mixture ,it's components are rather separated easily in physical means. For instance, if you have a salt water, you are able to divide them by using each physical properties. Water is able to turn to a state of gas by evaporating or boiling. Using such properties, you could separate water from salt. Therefore, separating compounds and mixtures are all about the components physical or chemical properties.

So, the answer is a. I hope it will help you^^
6 0
3 years ago
Read 2 more answers
1. What happens between the molecules of two objects when a hot object touches a cooler object?
iren2701 [21]

Answer:

1. conduction happens

2. gold silver iron, ect

3. they are good conductors for electricity and heat

4. atoms who have tightly bound electrons

5. plastic, paper, rubber, glass

6. radiant barriers

Explanation:

6 0
3 years ago
Read 2 more answers
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