The answer to you’re question is the last one 642.9 grams.
(2) argon. This is because Ca originally has 20 total electrons with a configuration of 2,8,8,2. When it looses its valence electrons it remains with 18 electrons total (2,8,8 config). Argon has 18 electrons total too (2,8,8 config).
<span>Fe
</span>FeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFeFe<span>Fe
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It is a plant so it is considered living.