# Question: What is the mass of 2 moles of helium?

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## What is the mass of 2 mole of helium?

A mixture of 2 moles of helium gas (atomic mass=4amu) and 1 mole of argon gas (atomic mass=40amu) is kept at 300K in a container.

## What is the mass of one mole of helium?

All elements have its atomic weight mentioned in the periodic table. So it can be found out easily from the periodic table itself. Therefore, one mole of helium has a mass of 4.002602 g.

## How many atoms are in 2.00 moles helium?

According to Avogadro’s number, 1 mol of any substance contains 6.022 × 1023 particles. As a result, 2.0 moles of helium (He) represent 2.0 mol × 6.022 × 1023 = 1.2 × 1024 atoms.

## At what temperature is the root mean square speed of an atom in an organ gas cylinder equal to the rms speed of helium gas atom at degree Celsius?

Hence, at 2523.67 K temperature, the root mean square speed of an atom of argon gas cylinder is equal to that of helium gas atom at − 20 ° C .

## What is mass of helium?

The total mass of four moles of helium (He) is 16.0104 grams.

## What is the mass of 1 helium atom?

The mass of one helium atom is 6.6×1024 g.

## How many helium atoms are in a mole?

A mole of helium gas contains 6.02 x 1023 helium atoms.

## How many grams are in a mole of helium?

The molar mass is the mass of one mole of an element and is found on the periodic table. If we look this number up for helium, we find that helium has a molar mass of 4.0 grams per mole. So one mole of helium has a mass of 4.0 grams.

## What’s in a helium atom?

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.

## At what temperature is the root mean square speed of an?

Let C and C’ be the r.m.s. Velocity of argon and a helium gas atoms at temperature TK and T’K respectively. Since, C=C′,∴,√3RT39.9=√3R×2534orT=39.9×2534=2523.7K.

## At what temperature in Kelvin is the root mean square speed of helium atoms?

The temperature at which oxygen molecules have the same root mean square speed as helium atoms have at 300 K is: (Atomic masses : He=4u,O=16u)

## At what temperature is the root mean square speed of an atom in an argon gas cylinder equal to the rms speed of a helium gas atom at AT mass of argon 39.9 HE 4?

M = Molar mass of the gas. ∴ At 2523.675 K, the rms speed of an atom of argon will be equal to that of helium at – 20°C.