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marin [14]
3 years ago
15

Scandium 15. Write the nuclear symbol for an ion with a charge of +2,20 protons, and 24

Chemistry
1 answer:
Hoochie [10]3 years ago
8 0
If the element has a charge of +2 it has lost two electrons giving it an overall positive charge making it a cation. In order to find the number of electrons, take the elements atomic number and subtract two since it lost two electrons
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The partial pressure of O2 in your lungs varies from 25 mm Hg to 40 mm Hg. What mass of O2 can dissolve in 1.0L OF water at 25.0
Inga [223]

The partial pressure of O2 in your lungs varies from 25 mm Hg to 40 mm Hg. What mass of O2 can dissolve in 1.0L OF water at 25.0oC when the O2 partial pressure is 40. mm Hg? Since the normal Water solubility of oxygen at 25oC and pressure = 1 bar is at 40 mg/L water, the partial pressure is only40 mmg Hg

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3 years ago
What are the major characteristics of Florida's three landform regions?(Northern highlands,Central highlands and the coastal low
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I know this one its that one
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Serhud [2]

Answer:

high C:N; N supply; energy

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6 0
4 years ago
An atom has a mass number of 9 and 5 neutrons. What is its atomic number?
denis23 [38]

Answer:

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7 0
3 years ago
Which statement best describes a relationship amongst hypotheses, theories, and laws
Ganezh [65]

The relationship between hypotheses, laws and theories is that a law is used to explain hypothesis and theories.

<h3>What is a law, a theory and hypothesis?</h3>

A hypothesis is a tentative conjecture explaining an observation, phenomenon or scientific problem that can be tested by further investigation or experimentation.

A theory is a coherent statement or set of ideas that explains observed facts or phenomena and correctly predicts new facts or phenomena not previously observed.

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This suggests that a law can be used to explain a theory and hypothesis.

Learn more about laws and theories at: brainly.com/question/9266219

#SPJ1

8 0
2 years ago
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