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Zarrin [17]
2 years ago
11

What is the charge on an ion with 21 protons, 30 neutrons, and 18 electrons.

Chemistry
1 answer:
Elis [28]2 years ago
5 0

Answer:

3+

Explanation:

Ignore neutrons.

Protons are positive and electrons are negative. To find a charge, it is protons minus electrons. In this atom, there are 21 protons and 18 electrons

21-18=3

Positive 3

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The electron configuration of an element is 1s22s22p63s1. Describe what most likely happens when an atom of this element comes n
bearhunter [10]

Answer:

The element with electron configuration 1s² 2s² 2p⁶ will most likely not........

Explanation:

5 0
2 years ago
The melting of a substance at its melting point is an isothermal process.
mamaluj [8]
The answer would be true
6 0
3 years ago
What quantity of sodium azide in grams is required to fill a 56.0 liters air bag with nitrogen gas at 1.00 atm and exactly 0 °C:
Margarita [4]

Answer:

108.6 g

Explanation:

  • 2NaN₃(s) → 2Na(s) + 3N₂(g)

First we use the <em>PV=nRT formula</em> to <u>calculate the number of nitrogen moles</u>:

  • P = 1.00 atm
  • V = 56.0 L
  • n = ?
  • R = 0.082 atm·L·mol⁻¹·K⁻¹
  • T = 0 °C ⇒ 0 + 273.2 = 273.2 K

<u>Inputting the data</u>:

  • 1.00 atm * 56.0 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 273.2 K
  • n = 2.5 mol

Then we <u>convert 2.5 moles of N₂ into moles of NaN₃</u>, using the <em>stoichiometric coefficients of the balanced reaction</em>:

  • 2.5 mol N₂ * \frac{2molNaN_3}{3molN_2} = 1.67 mol NaN₃

Finally we <u>convert 1.67 moles of NaN₃ into grams</u>, using its <em>molar mass</em>:

  • 1.67 mol * 65 g/mol = 108.6 g
6 0
2 years ago
The elements chlorine and iodine have similar chemical properties<br> because they
Anton [14]

Answer:

They are both halogens and have the same number of electrons on their outer shell.

Any element with 7 electrons in the outermost shell will have similar properties. Thus other elements in the same column of the periodic table as chlorine will have similar properties.

<u><em>If you liked my answer, please mark me brainliest!!!</em></u>

8 0
2 years ago
HELP ME PLEASE I NEED HELP SO BADLY
crimeas [40]

State the given:

Moles of Sulfur = 5 moles

Molar mass of Sulfur = 32.06g/mol

Look through the formulas:

Moles = Mass/Molar Mass

Rearrange the equation:

Mass = Moles x Molar mass

Plug in your given:

5 moles Sulfur   x   <u>32.06g</u>

                                 1 mol

<u>= 160.3g of Sulfur</u>

5 0
2 years ago
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