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Luba_88 [7]
3 years ago
5

Explain how you can determine the number of neutrons in the nucleus of an atom of any of the elements listed in the table.

Chemistry
1 answer:
spin [16.1K]3 years ago
3 0

The mass number = protons + electrons

Atomic number= protons (and electrons)


You can determine the number of neutrons by subtracting the number of protons from the mass number

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HELP please!!! One year is the amount of time it takes Earth to A. complete one revolution B. complete one rotation C. complete
NISA [10]
It would be A. complete one revolution
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Use the drop-down menus to complete each statement. is used as construction materials. is important for the production of crops.
lubasha [3.4K]

Bedrock is used in the construction of structures, the topsoil is important for the production of crops and the loss of fertile soil is known as desertification.

<h3>Bedrocks, topsoil, and desertification</h3>
  • Bedrocks are underlining rocks below soils. They are useful in construction works such as buildings, bridges, etc.

  • Topsoils are the topmost portions of soils. They are usually rich in humus and organic matter and are therefore very good for agricultural crop production.

  • Desertification is simply the loss of fertile soils and their transformation to barren, unproductive lands. Topsoils are lost and soils are rendered unsuitable for agriculture.

More on desertification can be found here: brainly.com/question/24255548

6 0
2 years ago
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Describe the porosity and permeability of Antarctic soil.
maksim [4K]

Antarctic soils exist, in general, they comprise a surface pavement (i.e., a layer of gravel, stones or boulders formed largely by weathering and the removal of fine materials mainly by wind action) and a seasonally thawed active layer over permafrost.

5 0
3 years ago
Combustion of hydrocarbons such as butane () produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the Earth's atmosp
Dahasolnce [82]

Answer:

1. C₄H₁₀ + ¹³/₂O₂ → 4CO₂ + 5H₂O

2. V = 596L

Explanation:

Butane (C₄H₁₀) reacts with oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O) thus:

C₄H₁₀ + O₂ → CO₂ + H₂O

1. The balanced chemical equation is:

C₄H₁₀ + ¹³/₂O₂ → 4CO₂ + 5H₂O

2. 0,360kg of butane are:

360g×\frac{1mol}{58,12g}=<em>6,19moles of butane</em>

These moles of butane are:

6,19moles of butane×\frac{4CO_2}{1molButane}= <em>24,8 moles CO₂</em>

Using V=nRT/P

Where:

n are moles (24,8 moles CO₂); R is gas constant (0,082atmL/molK); T is temperature, 20°C (293,15K); and P is pressure (1atm).

Volume (V) is:

<em>V = 596L</em>

I hope it helps!

8 0
4 years ago
a 0.784 g sample of magnesium is added to a 250 ml flask and dissolved in 150ml of water. magnesium hydroxide obtained from the
Svetach [21]

The chemical reaction involving Mg(OH)2 and HCl is:

<span>Mg(OH)2  +  2HCl  -->  MgCl2  +  2H2O</span>

 

So we see that for every 2 moles of HCl, 1 mole of Mg is reacted.

Calculating for moles HCl:

moles HCl = 0.300 M * 0.215 L

moles HCl = 0.0645 mol

 

The moles Mg then is:

moles Mg = 0.0645 mol * (1 / 2)

<span>moles Mg = 0.03225 mol</span>

5 0
3 years ago
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