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garik1379 [7]
3 years ago
14

What did early scientists assume that the polar caps had in common?

Chemistry
1 answer:
Vilka [71]3 years ago
3 0

Answer:

They assumed they both had water.

Explanation:

Because they only could look at it through telescopes that were not advanced

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What will happen if there is an insufficient supply of oxygen during the combustion of a hydrocarbon?
Kamila [148]
As long as there is some oxygen, the reaction will occur. If there is an insufficient amount of oxygen, then the oxygen will be the limiting reacting and there will be excess of the other reactants. 
8 0
4 years ago
he heat of fusion of tetrahydrofuran is . Calculate the change in entropy when of tetrahydrofuran melts at . Be sure your answer
lana [24]

Answer:

\Delta S=1.8x10^{-3}\frac{kJ}{K}=1.8\frac{J}{K}

Explanation:

Hello.

In this case, given the heat of fusion of THF to be 8.5 kJ/mol and freezing at -108.5 °C, for the required mass of 5.9 g, we can compute the entropy as:

\Delta S=\frac{n*\Delta H}{T}

Whereas n accounts for the moles which are computed below:

n=5.9g*\frac{1mol}{72g} =0.082mol

Thus, the entropy turns out:

\Delta S=\frac{0.0819mol*8.5 kJ/mol}{(-108.5+273.15)K}\\\\\Delta S=1.8x10^{-3}\frac{kJ}{K}=1.8\frac{J}{K}

Best regards.

3 0
3 years ago
Which of the following statements are true of acids and bases?
gtnhenbr [62]
A. Acids increase the number of OH- ions in a solution. FALSE
B. Bases increase the number of OH- ions in a solution. TRUE
C. Acids increase the number of H+ ions in a solution. TRUE
D. Bases increase the number of H+ ions in a solution. FALSE
8 0
3 years ago
In a hydrogen bomb, hydrogen is converted into:
Alona [7]

Answer:

helium ................

8 0
2 years ago
The _______ force between each planet and the Sun keeps the planets in orbit around the Sun.
finlep [7]

Answer:

The <u>Force of Gravity</u>  force between each planet and the Sun keeps the planets in orbit around the Sun.

Explanation:

4 0
3 years ago
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