How Many Atoms of Rubidium-85 Are in 87

question 64

Multiple Choice

How many atoms of rubidium-85 are in 87.2 g of rubidium? Rubidium-85 is 72.2 % abundant.

• A)5.16 × 10⁴⁶ atoms
• B)4.46 × 10²³ atoms
• C)8.51 × 10²³ atoms
• D)6.14 × 10²² atoms
• E)1.02 × 10²⁴ atoms

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Definitions:

Stock Dividend

A disbursement from a corporation to its shareholders, using shares as the medium instead of cash.

Stockholders' Equity

The ownership interest of shareholders in a corporation, represented by their share of the company's assets after all liabilities have been deducted.

Convertible Bonds

Bonds that can be converted into a predetermined number of the issuing company's shares at certain times during the bond's life, usually at the discretion of the bondholder.

Diluted Earnings Per Share

A metric that calculates a company's earnings per share (EPS) if all convertible securities were converted into common stock, often resulting in a lower EPS.