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Nataly [62]
3 years ago
12

What element has 4 protons 5 neutrons and 4 electrons

Chemistry
2 answers:
sergeinik [125]3 years ago
7 0

Answer: Beryllium

Explanation: Beryllium has atomic number 4, which means it has 4 protons in its nucleus, and 4 electrons in its orbitals. The only stable isotope of Beryllium has 5 neutrons.

Crazy boy [7]3 years ago
7 0
Beryllium has 4 protons 4 electrons and 5 neutrons
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victus00 [196]
18 D
19 B
20 D
21 Anabolic steroid abuse can lead to kidney and liver failure, enlarged heart or high blood pressure and changes in blood cholesterol.
8 0
3 years ago
The volume of a gas is 550 mL at 960 mm Hg and 200.0 C. What volume
Masja [62]

Answer:

The volume will be 568.89 mL.

Explanation:

Boyle's law says that "The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure"

Boyle's law is expressed mathematically as:

Pressure * Volume = constant

or P * V = k

Gay-Lussac's law indicates that when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases. That is, the pressure of the gas is directly proportional to its temperature. Gay-Lussac's law can be expressed mathematically as follows:

\frac{P}{T}=k

Where P = pressure, T = temperature, K = Constant

Finally, Charles's law indicates that as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases. In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

\frac{V}{T}=k

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:

\frac{P*V}{T} =k

Studying an initial state 1 and a final state 2, it is fulfilled:

\frac{P1*V1}{T1} =\frac{P2*V2}{T2}

In this case:

  • P1= 960 mmHg
  • V1= 550 mL
  • T1= 200 C= 473 K (being 0 C=273 K)
  • P2= 830 mmHg
  • V2= ?
  • T2= 150 C= 423 K

Replacing:

\frac{960 mmHg*550 mL}{473K} =\frac{830 mmHg*V2}{423 K}

Solving:

V2=\frac{423 K}{830 mmHg} *\frac{960 mmHg*550 mL}{473K}

V2= 568.9 mL

<u><em>The volume will be 568.89 mL.</em></u>

4 0
3 years ago
If I had a mixture of salt, sand, and iron filings I could separate the mixture by …
liubo4ka [24]
Okay to separate this mixture you will have to first use a magnet because the magnet will attract the iron filings out of the sand then you will remain with the sand and salt.

Next step is to add water to the sand and salt mixture the salt will dissolve in the water and the sand will not forming a heterogeneous mixture.Then using the method of filtration you can separate the sand from  the salt solution leaving the salt solution

 To separate the salt from the water use the method of evaporation this will enable you to get back the salt 

In the end you should beable to have the sand,salt and iron filings separate.

Hope this was helpful to you.

Happy New Years !!! May your year be prosperous 






3 0
2 years ago
Find the area shaded in yellow.<br> [ ? ] square units
slega [8]

Answer:

A(yellow) = 52

Explanation:

A(yellow) = A(total) - A(red)

= 11×6 - 7×2

= 66 - 14

= 52

6 0
3 years ago
The volume of a single rhodium atom is 1.01×10-23 cm3. What is the volume of a rhodium atom in microliters?
Anni [7]

Answer: 1.01 x 10^20 microliters.

Explanation: volume is defined as a three-dimensional measure of space that comprises a length, a width and a height. In other words, we are asked to convert from one volumetric measure to another (cubic centimeters to microliters) —volume is measured in units of cubic centimeters in metric, cubic inches or cubic feet in English measurement.

If, 1 cm³ = 1000 uL (microliters) then,

1 uL - - - - - - - - - 0.001 cm³ = 1 x 10^-3 cm

x uL - - - - - - - - - 1.01×10^-23 cm³

Therefore,

x uL = 1.01 x 10^-23 cm³ / 0.001 cm³

x uL = 1.01 x 10^(-23 - - 3)

x uL = 1.01 x 10^( - 23 + 3)

x uL = 1.01 x 10^20

Which is to say that a single rhodium atom of volume 1.01 x 10^23 cm³ would occupy 1.01 x 10^20 microliters.

4 0
2 years ago
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