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Sloan [31]
4 years ago
7

It takes energy to ionize any atom. It takes progressively more and more energy for each successive electron that is removed and

the increase is somewhat smooth. For the removal of which electron does boron exhibit a sudden marked increase in its ionization energy?
Chemistry
1 answer:
IrinaVladis [17]4 years ago
5 0

Answer:

Removal of Third Electron

Explanation:

a major jump is required to remove the third electron. In general, successive ionization energies always increase because each subsequent electron is being pulled away from an increasingly more positive ion.

Ionization energy increases from bottom to top within a group, and increases from left to right within a period.

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OLga [1]

Answer:

Final temperature of water is 83.8°C

Explanation:

In 500.0mL of a 6.00M NaOH solution, there are:

0.5000L × (6.00mol NaOH/ L) = <em>3.00moles of NaOH</em>

As the heat involved in dissolution is 44.5 kJ/mol, when the solution is dissolved:

44.5kJ/mol × 3.00moles = 133.5kJ = 133500J

Using coffee-cup calorimeter equation:

q = m×C×ΔT

<em>Where q is heat, m is mass of water (500.0g), C is specific heat of water (4.186J/g°C) and ΔT is change in temperature</em>

<em />

133500J = 500.0g×4.186J/g°C×(X-20.0°C)

63.8 = (X-20.0°C)

83.8°C = X

<em>Final temperature of water is 83.8°C</em>

3 0
3 years ago
Can the crabs see the plankton they eat near the ocean floor?
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Answer:

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The crabs cannot see the plankton they eat near the ocean floor. For the crabs to see the plankton, some color of visible light would need to reach the plankton so that it can be reflected into the crabs' eyes.

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What is the gram formula mass of Ca3(PO4)2
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Mass Molar of Ca_{3} (PO_4)_2
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Mass Molar of Ca_{3} (PO_4)_2 = 120 + 62 + 128 = 310 g/mol

Therefore: <span>What is the gram formula mass of Ca3(PO4)2 ?
</span>Answer: 310 grams
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