2 years ago

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Chemistry

1 answer:

sladkih [1.3K]2 years ago

6 0

Answer:

See explanation

Explanation:

20 = B

21 = C

22 = D

23 = B

24 = B

25 = C

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Which formula represents a polar molecule

krek1111 [17]

Answer:

the formula that represents a polar molecule is NH3 the 3 is small and toward the bottom

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3 years ago

Which has the higher percentage of aluminum, Al2O, or Al(NO3)3

Rzqust [24]

Al₂O has a higher percentage of aluminium.

Explanation:

To solve this problem, we have to compare the molar mass of the aluminium in each compound to one another as percentage of the whole compound:

Molar mass of Al₂O = 2(27) + 16 = 70g/mol

Molar mass of Al(NO₃)₃ = 27 + 3[14 + 3(16)] = 213g/mol

Percentage by mass of Al in Al₂O = $\frac{2x27}{70}$ x 100 = 77%

Percentage by mass of Al in Al(NO₃)₃ = $\frac{27}{213}$ x 100 = 12.7%

Al₂O has a higher percentage of aluminium.

learn more:

Molar mass brainly.com/question/2861244

#learnwithBrainly

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3 years ago

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Korvikt [17]

All of them are soluble salt.

First one dissociates into two ions.

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3 years ago

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laiz [17]

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2 years ago

What is the difference between a theory and a law?

kondaur [170]

Answer:

theory is diffrent from law

Explanation:

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2 years ago

Need help with cemester​

Need help with cemester