Answer is: 28,0855 amu.
%abudance(²⁸Si) =<span> 92,23% = 0,9223.
</span>%abudance(²⁹Si) = 4,67% = 0,0467.
%abudance(³⁰Si) = 3,10 = 0,031.
isotopic mass(²⁸Si) = 27,967927 amu.
isotopic mass(²⁹Si) = 28,976495 amu.
isotopic mass(³⁰Si) = 29,973770 amu.
Ar(Si) = <span>( 27.976927 x 92.23) + ( 28.976495 x 4.67) + (29.973770 x3.10)/100
= 28,0855 amu.</span>
Answer:
Watson and Crick were also aided in their discovery by Maurice Wilkins (1916-2004) and Rosalind Franklin (1920-1958). Franklin had taken X-ray photographs of DNA that her colleague, Wilkins, showed to Watson
Explanation:
<span>Carbohydrates have 4 kcal per gram of carbohydrates. (Protein is also 4 kcal/gram, while fat is 9 kcal/gram).
Take the total kcal and divide by 4 kcal/gram: 72 kcal/(4 kcal/gram) = 18 grams carbohydrates.</span>