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Karo-lina-s [1.5K]
3 years ago
11

When a high mass main sequence star runs out of both hydrogen and helium in its core, the core begins to fuse

Chemistry
1 answer:
Umnica [9.8K]3 years ago
4 0

Answer:

i guess it explodes

Explanation:

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A chemist lectures about the following definition for acids and bases. The acid-base behavior is analyzed in terms of how electr
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the Lewis concept of acids and bases

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True or False: Sulfur by itself isn't too bad, it's when it reacts with other elements that it can become dangerous
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Three carbon atoms are linked by single covalent bonds such that they form the shape of a V. All of the unshared electrons form
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C) 8

Explanation:

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The reaction described in Part A required 3.40 L of sodium chloride. What is the concentration of this sodium chloride solution
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Answer:

Part A:

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5 0
2 years ago
A 1.0l buffer solution contains 0.100 mol of hc2h3o2 and 0.100 mol of nac2h3o2. the value of ka for hc2h3o2 is 1.8×10−5. part a
Mandarinka [93]
There are two ways to solve this problem. We can use the ICE method which is tedious and lengthy or use the Henderson–Hasselbalch equation. This equation relates pH and the concentration of the ions in the solution. It is expressed as

pH = pKa + log [A]/[HA] 

 where pKa = - log [Ka]
[A] is the concentration of the conjugate base
[HA] is the concentration of the acid

Given:
Ka = 1.8x10^-5
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HC2H3O2 = 0.1 mol
NaC2H3O2 = 0.1 mol

Solution:
pKa = - log ( 1.8x10^-5) = 4.74

[A] = 0.015 mol + 0.100 mol = .115 moles
[HA] = .1 - 0.015 = 0.085 moles

pH = 4.74 + log (.115/0.085)
pH = 4.87
6 0
3 years ago
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