If 25.0g of N2 reacts with 25.0g of H2, 15.5g of NH3 is produced. What is the percent yield of this reaction? N2 + 3H2 → 2NH3
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How did planetesmals form planets? a. they broke apart into smaller chunks.b. they collided and stuck together.c. they cooled and pulled ice together.d. they began to rotate.

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__can be defined as which velocity changes