Two Pure Samples of Atoms, Labeled a and B, Contain

question 27

Multiple Choice

Two pure samples of atoms, labeled A and B, contain titanium (Ti) atoms and carbon (C) atoms, respectively. Each sample contains the same number of atoms. What is the ratio of the mass of sample B to that of sample A, m_B/m_A? Note the following atomic masses: C = 12 u; Ti = 48 u.

• A)1.0
• B)0.25
• C)2.0
• D)0.50
• E)4.0

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Definitions:

Confidence Interval

A span of numbers, calculated from observed data statistics, that probably encompasses an unknown parameter of a population.

Sample

A group or set collected from a larger population for the purpose of statistical analysis, representing the larger group.

Hypothesis Testing

A statistical method that uses sample data to evaluate a hypothesis about a population parameter.