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Degger [83]
2 years ago
5

By examining the fossil record, we know that there has been a gradual diversity of species.

Chemistry
1 answer:
elena55 [62]2 years ago
6 0
Im pretty sure this answer is true
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I NEED HELP ASAP PLZ LOOK AT THE PICTURE CAREFULLY!!!!
Virty [35]

Answer:

it is a little fuzzy

Explanation:

6 0
2 years ago
Calculate the molar concentration of the Br⁻ ions in 0.51 M MgBr2(aq), assuming that the dissolved substance dissociates complet
Y_Kistochka [10]
MgBr2(aq) is an ionic compound which will have the releasing of 2 Br⁻ ions ions in water for every molecule of MgBr2 that dissolves.
MgBr2(s) --> Mg+(aq) + 2 Br⁻(aq)
            [Br⁻] = 0.51 mol MgBr2/1L × 2 mol Br⁻ / 1 mol MgBr2 = 1.0 M
The answer to this question is [Br⁻] = 1.0 M
6 0
2 years ago
An aqueous solution that has a hydrogen ion concentration of 1.0 x 10^-8 mole per liter has a pH of
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Answer: 8, which is basic

Explanation: The hydrogen ion concentration is 1.0 x 10^-8 mole per liter. Using [H+] = 1.0 x 10 -(pH) the pH is 8. A pH above 7 is basic.

7 0
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Can Iron replace Hydrogen in the following reaction?: Fe(s) + HCl(aq) ---> H2(g) + FeCl2(aq)
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It can because Iron is more reactive than Hydrogen and a more reactive metal always replaces a less reactive one in a single replacement reaction
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3 years ago
The experimental apparatus represented above is used to demonstrate the rates at which gases diffuse. When the cotton balls are
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