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pochemuha
3 years ago
10

Today, we have seven major continents. However, most geologists don't think it was like this 200 million years ago. They think t

here was just _____.
one supercontinent
two supercontinents
three separate continents
four separate continents
Chemistry
2 answers:
Oksanka [162]3 years ago
5 0
Yeah this is option A one supercontinent
basically a long time ago we would have lived on pangea

Eventually this would split into two and we would get Gondwana and also Laurasia, so thechnically option two would be a possible choice but option A is the most possible choice.
Alborosie3 years ago
4 0

Answer:

The correct answer is one supercontinent.

Explanation:

Geologists believe that more than 200 million years ago there was one supercontinent, which is a collection of all the different existing continents. Based on gelogical evidence and software technology the borders of the existing continent were given more accurate fits in the reconstruction of one large supercontinent.

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What three things act on decaying organisms to help form fossil fuels
dimulka [17.4K]
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8 0
3 years ago
what is the mass of alumunium will be completly oxidized by 44.8 L of oxygen to produce Al2o3 at STP?​
Kobotan [32]

Answer:

Therefore, 2 moles of oxygen will be required to oxidize 2.66 moles of oxygen. 72g of Aluminium will be completely oxidized by 44.8 lit of oxygen at STP.

3 0
3 years ago
Hydrogen sulfide (H2S) is a gas that smells like rotten eggs. It can be produced by bacteria in your mouth and contributes to ba
Doss [256]

Answer:

See explanation.

Explanation:

Hello!

In this case, we consider the questions:

a. Ideal gas at:

 i. 273.15 K and 22.414 L.

 ii. 500 K and 100 cm³.

b. Van der Waals gas at:

 i. 273.15 K and 22.414 L.

 ii. 500 K and 100 cm³.

Thus, we define the ideal gas equation and the van der Waals one as shown below:

P^{id}=\frac{nRT}{V}\\\\ P^{vdW}=\frac{RT}{v-b}-\frac{a}{v^2}

Whereas b and a for hydrogen sulfide are 0.0434 L/mol and 4.484 L²*atm / mol² respectively, therefore, we proceed as follows:

a.

 i. 273.15 K and 22.414 L.

P^{id}=\frac{1.00mol*0.08206\frac{atm*L}{mol*K}*273.15K}{22.414L}=1 .00 atm

 ii. 500 K and 100 cm³ (0.1 L).

P^{id}=\frac{1.00mol*0.08206\frac{atm*L}{mol*K}*500K}{0.100L}=410.3 atm

b.

 i. 273.15 K and 22.414 L: in this case, v = 22.414 L / 1.00 mol = 22.414 L/mol

P^{vdW}=\frac{0.08206\frac{atm*L}{mol*K}*273.15K}{22.414L/mol-0.0434L/mol}-\frac{4.484 atm*L^2/mol^2}{(22.414L/mol)^2}=0.993atm

 ii. 500 K and 100 cm³: in this case, v = 0.1 L / 1.00 mol = 0.100 L/mol

P^{vdW}=\frac{0.08206\frac{atm*L}{mol*K}*500K}{0.100L/mol-0.0434L/mol}-\frac{4.484 atm*L^2/mol^2}{(0.100L/mol)^2}=276.5atm

Whereas we can see a significant difference when the gas is at 500 K and occupy a volume of 0.100 L.

Best regards!

5 0
3 years ago
6.<br>What are the mass numbers of; hydrogen, helium<br>and boron? I<br>승​
madreJ [45]
The mass number of hydrogen is 2

The mass number of helium is 4

The mass number of boron is 7

3 0
3 years ago
What is the charge on Cl (chloride) and why is it called an anion?
Marina86 [1]

Cl (chloride) have negative charge Cl-, and it's called an anion bcz when an atom gains one or more electrons, a negative ion is formed, which makes the atom has more electrons than protons.

6 0
2 years ago
Read 2 more answers
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