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scZoUnD [109]
2 years ago
6

What is the mass of 3.01 X 1023 atoms of iron? (atomic mass of Fe=56)

Chemistry
1 answer:
anyanavicka [17]2 years ago
3 0
84280/3011 or 27.9907g Fe

Explanation:

(3.01 * 10^23)/1 x 1 mol Fe/(6.022 * 10^23) x 56g Fe/ 1 mol Fe = 27.9907 g Fe
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Describe the structure of atoms including the masses, electrical, charges, and locations of protons, neutrons in the nucleus ,an
steposvetlana [31]

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The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge).

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The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge).

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2 years ago
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)  

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

x^2 = 3.33x10^-12  

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5 0
3 years ago
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The characteristic functional groups of a protein are _____.
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Answer:

\boxed{\text{amide groups}}

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2 years ago
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