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Advocard [28]
4 years ago
7

Complete the sentence about the continental drift theory

Biology
2 answers:
Viefleur [7K]4 years ago
8 0

Answer:

c. Western Africa

B. Eastern South America

Explanation:

sergeinik [125]4 years ago
3 0

The correct answers are:

1. C. Western Africa;

2. B. Eastern South America;

Alfred Wegener has spent lot of times looking at maps, as it was his job. One day he noticed something peculiar, the western coast of Africa and the eastern coast of South America were an almost perfect match. They looked like peaces of puzzle that belong together. In his mind this was suggesting that these two continents had been merged in the past, and than broke apart. He later got proof about his theory by observing the sea mounts in the Atlantic Ocean.

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If the DNA sequence was ATTCGCTA what would the DNA paired sequence be
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For each of the formulas, classify the formula as either an empirical formula, a molecular formula, or both. NaHCO3 empirical mo
shutvik [7]

Answer:

Both

Explanation:

Baking soda is the common name of  sodium bicarbonate or sodium hydrogen carbonate. Both the empirical and molecular formula of sodium bicaronate is NaHCO3 .

Baking soda is soluble in water and has a molar mass of almost Molar mass: 84.007 g/mol.

If we look at molecular formula of NaHCO3, it has molar ratio of 1:1:1:3 and we can say that every thing in this molar ratio make whole mass as : 23g +1 g +12 g+48 g= 84 grams.

Since we know that empirical formula demonstrates the simplest ratio of elements present in a compound and molecular formula demonstrates the total molar ratio of each element in a compound, hence we see that its empirical and molecular formulas both are already simple because they have simplest ratio which cannot be simplified further.

Hope it help!



4 0
3 years ago
Read 2 more answers
PLEASE HELP!!!!!!!!! WILL MARK BRAINLIEST!!!!!!
snow_tiger [21]
I think it is A or C
Thanks
5 0
3 years ago
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