Rhea has a balloon that contains 0.5 mole of helium. how many particles of helium are in the balloon?

Answers

Answer 1
Answer:

Answer:

\boxed{3 * 10^(23)}

Explanation:

1 mol of helium contains 6.022 × 10²³ atoms

\text{Atoms of He} =\text{0.5 mol He} * \frac{ 6.022 * 10^(23) \text{ atoms He}}{\text{1 mol He}}= 3 * 10^(23) \text{ atoms He}

The balloon contains \boxed{3 * 10^(23) \text{ atoms of He}}.

Answer 2
Answer:

69.253 helium particles are in the balloon.

What is helium particles?

Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with either one or two neutrons, depending on the isotope, held together by the strong force. Unlike for hydrogen, a closed-form solution to the Schrodinger equation for the helium atom has not been found.

A helium atom is an atom of the chemical element helium. Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with either one or two neutrons, depending on the isotope, held together by the strong force. Unlike for hydrogen, a closed-form solution.

Helium is the element which you can find on the upper right side of the periodic table with atomic number 2. It comes first amongst the family of the noble gases. Helium falls under inert gas since its outermost electron orbital is full with two electrons.

The answer is 69.253.

Learn more about helium, refer:

brainly.com/question/25306199

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Which of the following will stay constant, no matter if the substance is in the solid, liquid, or gas state? volume shape temperature mass

Answers

Answer : The correct option is, Mass

Explanation :

As we know that there are 3 states of matter :

Solid state : It is a state in which the particles are closely packed and does not have any space between them. This state have a definite shape and volume.

Liquid state : It is a state in which the particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another. This state have a definite volume but does not have a fixed shape.

Gaseous state : It is a state in which the particles are loosely arranged and have a lot of space between them. This state have indefinite volume as well as shape.

If we are taking 100 grams of ice then after melting its mass remains same but its shape, volume and temperature will be changed and after evaporation its mass remains same but its shape, volume and temperature will be changed.

Hence, the mass will stay constant, no matter if the substance is in the solid, liquid, or gas state.

Answer:

The correct answer is mass

Explanation:

Hello!

Let's solve this!

In the solid state, where the molecules occupy a definite place, and remain still, the shape and volume remain constant.

In the liquid state the molecules take the form of the container that contains them. So the shape is not defined but the volume is defined.

In the gaseous state the molecules are disordered, and have neither defined volume nor shape.

In all three states the mass remains constant.

The temperature causes the change of state.

We conclude that the correct answer is mass

Calculate the final temperature of a sample of argon of mass 12.0 g at 273.15 K that is expanded reversibly and adiabatically from 1.0 dm3 to 3.0 dm3. The isochoric heat capacity for argon is 12.48 J/K.mol.

Answers