Which Gas Has the Lowest Density Under Standard Temperature and Pressure

question 51

Multiple Choice

Which gas has the lowest density under standard temperature and pressure?

• A)hydrogen
• B)helium
• C)oxygen
• D)nitrogen
• E)carbon dioxide

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Definitions:

Ampersand

A symbol (&) used in programming to represent the address-of operator or bitwise AND operation, depending on context.

Asterisk

In programming, an asterisk is used as a symbol for multiplication, and in C/C++, it also indicates a pointer when used in variable declaration or dereferencing.

Stdio.h

A header file in C programming language that includes functions for input/output operations, such as printing to the console or reading input.

Standard Header

A header file defined by the C or C++ standards, providing definitions and functionality for standard library facilities.