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Sunny_sXe [5.5K]
3 years ago
10

Briefly explain Potassium with 19 protons and 19 neutrons

Chemistry
1 answer:
Igoryamba3 years ago
8 0

Answer: Group  

1  

Melting point  

63.5°C, 146.3°F, 336.7 K  

Period  

4  

Boiling point  

759°C, 1398°F, 1032 K  

Block  

s  

Density (g cm−3)  

0.89  

Atomic number  

19  

Relative atomic mass  

39.098    

State at 20°C  

Solid  

Key isotopes  

39K  

Electron configuration  

[Ar] 4s1  

CAS number  

7440-09-7  

Explanation:

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Using the mass of a proton 1.0073 amu and assuming it's diameter is1.0x10^-15, calculate the density of a proton in g/cm^3. I'm
valkas [14]
You just have to find a conversion from amu to grams. For every 1 amu, there is 1.66×10⁻²⁴ grams. Thus,

Mass of proton = 1.0073 amu * 1.66×10⁻²⁴ grams/amu = 1.672×10⁻²⁴ grams

Since a proton is spherical in shape, the volume would be:

Volume = 1/6*πd³ = 1/6*π(1.0×10⁻¹⁵ cm)³ = 5.236×10⁻⁴⁶ cm³

Therefore, the density is equal to

Density = Mass/Volume = 1.672×10⁻²⁴ grams/5.236×10⁻⁴⁶ cm³
Density = 3.2×10²¹ g/cm³
4 0
3 years ago
Please help me answer this question
abruzzese [7]

Answer:

Electrolytes are observed by conductivity - so unknown 2 should be circled, and Tap Water, which almost always contains electrolytes, mineral salts in solution.

Explanation:

7 0
3 years ago
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Which part of the body protects organs , provides support, and forms blood cells
nata0808 [166]
<span>the skeleton because if you didn't have bones then you wouldn't be able to stand up.</span>
6 0
3 years ago
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Which phrases accurately describe acids? Check all that apply.
weqwewe [10]

Answer: Option 1, 4 and 5 describe acids accurately.

Explanation:

Option 1: Acids have a sour taste because of the concentration of H^+ ion.

Option 2: They are corrosive in nature, that is they are not at all gentle with the skin and fabric as some acids intend to burn skin such as H_2SO_4 is a strong acid which can burn skin as well as fabric.

Option 3: Acids need electrons to release H^+ ions and non-metals do not donate electrons hence, there is no reaction between a non-metal and an acid.

Option 4: All acids do contain hydrogen. They dissociate in the presence of water to produce H^+ ions.

                                 HCl\overset{H_2O}{\rightarrow} H^++Cl^-

Option 5: Acids do conduct electricity that is they carry electrical charges. This was explained by Arrhenius. He said that the acids dissociate into H^+ions, when it is dissolved in water. These ions hence acts as charge carriers in water.

8 0
3 years ago
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The reaction of 9.2 grams of fluorine with excess chlorine produced 6.3 grams of clf3. what percent yield of clf3 was obtained?
andrey2020 [161]

Answer:

              %age Yield  =  20.12 %

Solution:

The Balance Chemical Reaction is as follow,

                                          Cl₂  +   3 F₂    →    2  ClF₃

According to Equation ,

              114 g (3 mole) F₂ produces  =  184.88 g (2 moles) of ClF₃

So,

                       19.2 g of F₂ will produce  =  X g of ClF₃

Solving for X,

                      X =  (19.2 g × 184.88 g) ÷ 114 g

                      X  =  31.13 g of ClF₃   (Theoretical Yield)

As we know,

                     %age Yield  =  (Actual Yield ÷ Theoretical Yield) × 100

                     %age Yield  =  (6.3 g ÷ 31.3 g) × 100

                     %age Yield  =  20.12 %

5 0
3 years ago
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