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Anastasy [175]
2 years ago
13

Imprints of the shells of ocean clams are often found in the rocks of the Appalachian Mountains. What do these imprint fossils M

OST likely indicate?
O A. These mountains were once under the ocean.
OB. These mountains once had a more rainy climate.
OC. Mountain river clams evolved from ocean clams,
OD. Ocean clams evolved from mountain river clams.
Chemistry
1 answer:
Anit [1.1K]2 years ago
7 0
A. It is the most reasonable answer
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6 0
3 years ago
If i have 8 L of 0.25 M solution, how many miles of MgCl2 are present
qaws [65]

Answer:

2 moles

Explanation:

The following were obtained from the question:

Molarity = 0.25 M

Volume = 8L

Mole =?

Molarity is simply defined as the mole of solute per unit litre of solution. It is represented mathematically as:

Molarity = mole of solute/Volume of solution.

With the above equation, we can easily find the number of mole of MgCl2 present in 8 L of 0.25 M MgCl2 solution as follow:

Molarity = mole of solute/Volume of solution.

0.25 = mole of MgCl2 /8

Cross multiply to express in linear form

Mole of MgCl2 = 0.25 x 8

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Therefore, 2 moles of MgCl2 are present in 8 L of 0.25 M MgCl2 solution

4 0
3 years ago
What is the frequency of an electromagnetic wave that has a wavelength of
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➡ ANSWER

☑ <em><u>C</u></em><em><u>.</u></em><em><u> </u></em><em><u>3.5 105</u></em><em><u> </u></em><em><u>Hz</u></em>

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2 years ago
Consider n2 (g) + 3h2 (g) →→ 2nh3 (g). what is the mass of nitrogen gas required to react with 0.129 g h2?
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The given chemical reaction given above is already balanced such that the number of atoms in the left hand side of the equation is equal to that of the right hand side. Using the dimensional analysis, proper conversion factors and the molar masses,

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Therefore, 0.602 g of nitrogen will be required for he reaction. 
6 0
3 years ago
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