The Same Activity Is Measured for Two Different Isotope Samples

question 19

Multiple Choice

The same activity is measured for two different isotope samples. One sample contains 0.0450 kg of (atomic mass = 230.033 937 u, t_1/2 = 20.8 days) . The second sample contains an unknown amount of (atomic mass = 231.036 264 u, t_1/2 = 4.3 days) . What is the mass of the second sample?

• A)0.0093 kg
• B)0.23 kg
• C)0.110 kg
• D)0.037 kg
• E)0.0450 kg

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Definitions:

Total Capitalization

The sum of a company's long-term debt, equity, and retained earnings, reflecting the total funding sourced from investors and creditors.

Debt-Equity Ratio

A financial ratio used to understand a company's leverage, by dividing its complete liabilities by the equity available to shareholders.

Price-Earnings Ratio

A valuation ratio of a company's current share price compared to its per-share earnings, used to gauge the relative value of a stock.

Earnings Per Share

A profitability measure that indicates the portion of a company's profit allocated to each outstanding share of common stock, calculated as net income minus dividends on preferred stock divided by the average outstanding shares.