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Natalka [10]
4 years ago
7

Which statement about Mesosaurus fossils and continental drift is MOST accurate?

Chemistry
1 answer:
Naddik [55]4 years ago
6 0

The Mesosaurus could not swim between the continents in the open ocean, so the fossils  show that the continents must have been together in the past.

Explanation:

One critical point in the use of Mesosaurus to explain continental drift is that they could not swim between the continents in open ocean.

Mesosaurus is known as middle lizard and its fossils have been used to proof that continental drifts truly result. Alfred Wegener is credited with the hypothesis of continental drift in which the land masses where once joined together.

  • The fossils of this ancient organism have been discovered in the Southern part of Africa and Eastern part of South America.
  • Both continents were once believed to be joined together in geologic time past.
  • Mesosaurus was a swamp dwelling animal that could not have swim between the two continents. The ocean will pose a barrier. For its fossils to be found on the two continents, the land masses must have been joined together.

Learn more:

Mesosaurus brainly.com/question/5002949

#learnwithBrainly

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What observations will you look for to determine if a metal undergoes reaction?
ElenaW [278]
When a metal undergoes a reaction, especially with a nonmetal, you should look for the formation of salts or the formation of precipitates in the case the product is not soluble to water. Metals loses electrons to form positive ions which then reacts to nonmetals that are negatively charged ions.<span />
8 0
3 years ago
A 7.300 gram sample of aluminum was quantitatively combined with a sample of selenium to form a compound. The compound weighed 3
adelina 88 [10]

Answer:

The empirical formula is Al2Se3  

Explanation:

<u>Step 1:</u> Data given

Mass of the sample of aluminium = 7.300 grams

Mass of the compound = 39.35 grams

Molar mass of aluminium = 26.98 g/mol

Molar mass of selenium = 78.96 g/mol

<u>Step 2:</u> Calculate mass of selenium

Mass of selenium = mass of compound - mass of aluminium

Mass of selenium = 39.35 - 7.3 = 32.05 grams

<u> Step 3:</u> Calculate moles of Al

Moles Al = Mass Al/ Molar mass Al

Moles Al = 7.300 grams / 26.98 g/mol

Moles Al = 0.2706 moles

<u>Step 4:</u> Calculate moles of Se

Moles Se = Mass Se / Molar mass Se

Moles Se =32.05 g / 78.96 g/mol

Moles Se = 0.4059 moles

<u>Step 5</u>: Divide through the smallest amount of mol

Aluminium: 0.2706 / 0.2706 = 1

Selenium: 0.4059/0.2706 = 1.5

This means for each mol aluminium, we have 1.5 moles of selenium

For each 2 moles of aluminium, we have 3 moles of selenium

The empirical formula is Al2Se3  

This is aluminium(III) selenide.

8 0
3 years ago
Correct answer please i need it before 12:07
choli [55]

Answer:

xenon

Explanation:

Xenon is a non-metal, odorless gas, consist of single atoms, colorless, and 8 valence electrons out of everything else on this list.

6 0
3 years ago
qual a concentração de uma solução contendo 50g de cloreto de sódio dissolvidos em 250ml de solução​
anygoal [31]

Answer:

200 g/L

Explanation:

The concentration of a solution (also called molarity) can be calculated with the formula:

M=\frac{m}{V}

where

m is the mass of the solute

V is the volume of the solution

For the solution in this problem we have:

m = 50g is the mass of the solute

V = 250 mL = 0.250 L is the volume of the solution

Therefore, the concentration of the solution is:

M=\frac{50 g}{0.250 L}=200 g/L

6 0
3 years ago
The reason for using 1-propanol as the solvent of choice for recrystallization is that triphenylphosphine oxide is more soluble
tensa zangetsu [6.8K]

Answer:

True

Explanation:

Hydrogen bonding is a bond that exists between hydrogen and a highly electronegative element such as oxygen, nitrogen, fluorine etc.

The greater solubility of the triphenylphosphine oxide owes to the hydrogen bonded interaction between it and the 1-propanol.

The alkene lacks such hydrogen bonded interaction because it does not have a highly electronegative atom in its structure.

Hence, triphenylphosphine oxide is removed based on its polarity and hydrogen bonding ability.

3 0
3 years ago
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