The Atomic Mass of N Is 14 U and That

question 30

Multiple Choice

The atomic mass of N is 14 u and that of Ca is 40 u. The proportion of N by mass in the compound Ca₃N₂ is

• A) 19 percent.
• B) 35 percent.
• C) 40 percent.
• D) 81 percent.

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Definitions:

Interest Method

A financial calculation used to determine the amount of interest due or earned over a specific period of time, considering factors like principal, rate, and time.

Annuity

An investment vehicle that provides a consistent series of payments to a person, mainly serving as a source of income for those who have retired.

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Interest on a loan or deposit calculated based on both the initial principal and the accumulated interest from previous periods.

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The assessed present-day value of money to be received in the future or a pattern of cash inflows, factoring in an established rate of return.