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dybincka [34]
3 years ago
14

Olivia became interested in the fossil evidence that Wegener used to form his hypothesis of continental drift. How did fossils s

how that the continents were once joined together?
A. Animal fossils such as the mesosaurus were found on one continent.
B. Scientists found examples of different kinds of fossils on some continents.
C. Plant fossils of the same kind of fernlike plants were found on five continents.
D. Freshwater animal fossils were found in the nearby oceans.
Chemistry
1 answer:
tangare [24]3 years ago
8 0

Answer:

C.Plant fossils of the same kind of fernlike plants were found on five continents

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5 0
3 years ago
Write a net ionic equation to show that acetylsalicylic acid (aspirin), hc9h7o4, behaves as a brønsted-lowry acid in water.
Thepotemich [5.8K]
By definition, Bronsted-Lowry acid is a proton donor in the acid-base neutralization reaction. When a weak acid like acetylsalicylic acid is reacted with water, the water here acts as the Bronsted-Lowry base. This is possible because water has properties of amphoterism - can act as an acid or base. In this case, acetylsalicylic acid would have to donate its H+ atom to water, so that it would yield a hydronium ion, H₃O⁺. The complete net ionic reaction is shown in the picture.

So, in the reaction, the products yield are the acetylsalicylate ion and the hydronium ion.

3 0
3 years ago
1. How many moles of oxygen gas are needed to form 21.8 liters of water vapor?
BaLLatris [955]

0.781 moles

Explanation:

We begin by balancing the chemical equation;

O₂ (g) + 2H₂ (g) → 2H₂O (g)

21.8 Liters = 21.8 Kgs

To find how many moles are in 28.1 Kg H₂O;

Molar mass of H₂O = 18 g/mol

28.1/18

= 1.56 moles

The mole ratio between water vapor and oxygen is;

1 : 2

x : 1.56

2x = 1.56

x = 1.56 / 2

x =  0.781

0.781 moles

7 0
3 years ago
Samples of each of the following objects are removed from a 60º C water bath, in which they have been for enough time to reach t
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Answer:

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2kj for second question

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You have 45.2 liters of SO2. This would be equal to
Andreas93 [3]

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