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Vika [28.1K]
4 years ago
15

Which element has the electron configuration,

Chemistry
1 answer:
Tom [10]4 years ago
4 0

Answer:

B. technetium

Explanation:

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What is the total mass of 2.0 moles of diatomic hydrogen?
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diatomic hydrogen is written as H2                                                                                (2.02 grams H2) <------- if each hydrogen atom is 1.01 grams, then two hydrogen atoms are 2.02 grams                                                                                                                  2.0 moles H2 X 2.02 grams H2                                                                                             ------------- (divide to cancel moles)   = 4.04 grams/mole H2 ÷ one mole = 4.04 grams H2

                                                          

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