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Rus_ich [418]
3 years ago
15

Which is the last element in the periodic table?

Chemistry
2 answers:
Ludmilka [50]3 years ago
6 0

Answer:

Oganesson!

It is a synthetic chemical element with the symbol Og and atomic number 118. It was first synthesized in 2002 at the <em>Joint Institute for Nuclear Research</em> in Dubna, near Moscow, Russia, by a joint team of Russian and American scientists.

kipiarov [429]3 years ago
6 0

Answer:

the last element is ogasnesson

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Given 0.500 moles of H₂, how many grams of NH₃ would be produced?
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0.333 mol NH₃

Explanation:

N₂  +  3 H₂  ⇆  2 NH₃

This is the reaction that produces NH₃.  Use the mole ratios to solve.  For every 3 moles of H₂ that are consumed, 2 moles of NH₃ are produced.

(0.500 mol H₂) × (2 mol NH₃/3 mol H₂) = 0.333 mol NH₃

You will produce 0.333 moles of NH₃.

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