Gases Quiz # 1

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Mlbp28

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Quizzes Created: 1 | Total Attempts: 87

Questions: 10 | Attempts: 87 | Updated: Mar 21, 2023

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Gas, alongside liquid, solid and plasma, is one of the four fundamental states of matter. It can be made up of individual atoms, elemental molecules made from one type of atom, or compound molecules made from a variety of atoms.

Questions and Answers

1.

It is the force per unit area.

Explanation
Pressure is defined as the force per unit area. In other words, it is the amount of force applied to a given area. When a force is distributed over a larger area, the pressure is lower, and when the same force is applied to a smaller area, the pressure is higher. This concept is widely used in various fields, such as physics, engineering, and fluid dynamics, to understand and analyze the effects of forces on different surfaces. Therefore, the given answer "pressure" accurately describes the definition of pressure as the force per unit area.

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2.

It is the chemists' standard unit for specifying the amount of any sample of gas

Explanation
The mole is the chemists' standard unit for specifying the amount of any sample of gas. It is a unit of measurement that represents a specific number of atoms, molecules, or ions in a substance. The mole allows chemists to compare and calculate the amounts of different substances in chemical reactions. It is based on Avogadro's number, which is approximately 6.022 x 10^23 particles per mole.

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3.

It is the amount of space occupied by an object

Explanation
Volume is a measure of the amount of space that an object occupies. It is typically measured in cubic units, such as cubic meters or cubic centimeters. The volume of an object can be calculated by multiplying its length, width, and height. In simpler terms, volume refers to how much space an object takes up.

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4.

It is the force exerted on a unit area of the Earth's surface

Explanation
Atmospheric pressure refers to the force exerted by the weight of the Earth's atmosphere on a unit area of the Earth's surface. This pressure is caused by the gravitational pull on the air molecules in the atmosphere. It is responsible for various weather phenomena and affects the behavior of gases, liquids, and solids on the Earth's surface.

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5.

1 atm is equal to how many mmHg?

Explanation
1 atm is equal to 760 mmHg. This is because mmHg stands for millimeters of mercury, which is a unit of pressure. 1 atm is defined as the average atmospheric pressure at sea level, and it is equivalent to the pressure exerted by a column of mercury that is 760 millimeters high. Therefore, 760 mmHg is the correct conversion factor for 1 atm.

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6.

What is the representative particle for a gaseous nitrogen?

Explanation
Gaseous nitrogen is made up of diatomic molecules, meaning that two nitrogen atoms are bonded together. Therefore, the representative particle for gaseous nitrogen is a molecule.

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7.

What is the representative particle for the gas neon?

Explanation
Neon is a noble gas that exists as individual atoms. The representative particle for any element is the smallest unit of that element, which is an atom in the case of neon. Therefore, the correct answer is atom.

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8.

What is the temperature at STP?

Explanation
The temperature at STP (Standard Temperature and Pressure) is 273 K or 0 degrees Celsius. STP is defined as a temperature of 273.15 K (0 degrees Celsius) and a pressure of 1 atmosphere (atm). Therefore, both 273 K and 0 degrees Celsius are correct representations of the temperature at STP.

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9.

What is the pressure at STP?

Explanation
The pressure at STP (Standard Temperature and Pressure) can be measured in multiple units, including 1 atm, 760 torr, 760 mmHg, and 101,325 Pa. These units are all equivalent and represent the standard pressure conditions at sea level.

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10.

It is the term used if gas was formerly in liquid state

Explanation
The term "vapor" is used to describe gas that was formerly in a liquid state. It is commonly used to refer to the gaseous form of substances that typically exist as liquids at room temperature and pressure. On the other hand, "fume" refers specifically to the gas or smoke produced by a chemical reaction or combustion process. While both terms are related to gases, "vapor" is a more general term while "fume" is more specific to the gas produced by certain processes.

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Current Version
Mar 21, 2023

Quiz Edited by
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Feb 29, 2012

Quiz Created by
Mlbp28

Gases Quiz # 1

It is the force per unit area.

It is the chemists' standard unit for specifying the amount of any sample of gas

It is the amount of space occupied by an object

It is the force exerted on a unit area of the Earth's surface

1 atm is equal to how many mmHg?

What is the representative particle for a gaseous nitrogen?

What is the representative particle for the gas neon?

What is the temperature at STP?

What is the pressure at STP?

It is the term used if gas was formerly in liquid state