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GuDViN [60]
3 years ago
5

Astronauts go to live on the International Space Station for a period of ________ month(s). A one B three C six D nine

Chemistry
1 answer:
kumpel [21]3 years ago
3 0

Answer:

The answer is C. six months

Explanation:

I hope this helps you bestie:))

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PbCl2 would not dissolve because it is insoluble based on the solubility rules for substances that will dissolve in water. This compound would instead form a solid precipitate at the bottom of the container.

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A 25.0 ml sample of 0.150 m benzoic acid is titrated with a 0.150 m naoh solution. what is the ph at the equivalence point? the
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Solution:

At the equivalence point, moles NaOH = moles benzoic acid  

HA + NaOH ==> NaA + H2O where HA is benzoic acid  

At the equivalence point, all the benzoic acid ==> sodium benzoate  

A^- + H2O ==> HA + OH- (again, A^- is the benzoate anion and HA is the weak acid benzoic acid)  

Kb for benzoate = 1x10^-14/4.5x10^-4 = 2.22x10^-11  

Kb = 2.22x10^-11 = [HA][OH-][A^-] = (x)(x)/0.150  

x^2 = 3.33x10^-12  

x = 1.8x10^-6 = [OH-]  

pOH = -log [OH-] = 5.74  

pH = 14 - pOH = 8.26  


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3 years ago
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Answer:

True

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List the steps in the process of calculating average atomic mass given data about the isotopes of an element.
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Answer:

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Explanation:

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