How Many C₂H₄ Molecules Are Contained in 45

question 176

Multiple Choice

How many C₂H₄ molecules are contained in 45.8 mg of C₂H₄? The molar mass of C₂H₄ is 28.05 g mol^-1.

• A) 9.83 × 10²⁰ C₂H₄ molecules
• B) 7.74 × 10²⁶ C₂H₄ molecules
• C) 2.71 × 10²⁰ C₂H₄ molecules
• D) 3.69 × 10²³ C₂H₄ molecules
• E) 4.69 × 10²³ C₂H₄ molecules

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Definitions:

Monophyletic Clade

A Monophyletic Clade is a group of organisms that consists of a single common ancestor and all its descendants, representing a complete branch on the tree of life.

Lobe-Finned Fish

A group of fishes characterized by fleshy, lobed, paired fins, which are precursors to the limbs of terrestrial vertebrates.

Paraphyletic Clade

A group of organisms that includes an ancestral species and some, but not all, of its descendants.

Tetrapods

Vertebrate animals with four limbs, or descent from such organisms, including amphibians, reptiles, mammals, and birds.