The Universe Contains About Ten Times as Many Hydrogen Atoms

question 14

Multiple Choice

The universe contains about ten times as many hydrogen atoms as helium atoms,but a helium atom has four times the mass of a hydrogen atom.What is the approximate ratio of the universe's hydrogen to helium by mass?

• A) 2.5 to 1
• B) 10 to 1
• C) 4 to 1
• D) 1 to 4

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Definitions:

Marginal Revenue

The additional revenue that a company receives from selling one more unit of a good or service.

Downward-Sloping Demand

A common economic principle where the quantity demanded of a good or service decreases as its price increases.

Quantity Tax

A tax that is levied on the quantity of a good produced or sold, rather than its price.

Marginal Cost

The rise in overall expenses resulting from the production of an extra unit of a product or service.