The answer is C. 146g because you add all of the masses of the individual elements and then mulyiply by 1.72 to get your answer.
oops pls forgive me I accidentally did the wrong question.
Answer: There are 971.77 millimoles in 3.89 grams of Helium
Explanation:
i think its right im not really sure
Noble gases already have eight electrons in their outer shells and they don't want to attract anymore. Since electronegativity measures the amount of attraction between an atom and an electron, noble gases do not have electronegativity.
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