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:

Multiple-Step

An income statement format that separates operating revenues and expenses from non-operating ones to calculate net income.

Operating Expenses

Costs associated with the daily operations of a business, excluding cost of goods sold, directly related to generating revenue.

Nonoperating Activities

Nonoperating activities involve the revenues and expenses that are not related to the core operations of a business.

Gross Profit Rate

The ratio of gross profit to net sales, expressing the percentage of revenue that exceeds the cost of goods sold.