# What is the mass of a mole of hydrogen H2 molecules?

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## What is the mole of H2?

H2 – There are 2 moles of hydrogen atoms (1 mole of elemental hydrogen).

## What is the mass of 2 mole H2 molecule?

Answer: 1 mole of hydrogen gas weighs 2 gram so 2 moles weigh 4 grams mate hope this helps.

## How many hydrogen molecules H2 are in a mole?

The question indicates that there is 1 mole of H2. Thus there are 6.022 * 1023 molecules of H2.

## What is the formula for moles to grams?

Moles to grams example problem

Solution: Find out the molar mass of the substance (hint: you can use Molar mass of the substance alone to calculate molar mass). The molar mass of KClO3 is 122.548 g/mol. Multiply the given number of moles (2.50 mol) by the molar mass (122.548 g/mol) to get the grams.

## How many moles are in 5g of H2?

So, in 5g hydrogen, there are 5/2=2.5 moles of hydrogen. In 1 mole of hydrogen, there are 6.022×1023 hydrogen molecules.

## How many moles are in 1 kg of hydrogen?

The atomic mass of hydrogen is 1 g/mole. To make up 1 kilogram or 1000 g of hydrogen element, 1000 moles of hydrogen is required. Each mole has a Avogadro’s number of atoms or atoms. Thus, 1 kg hydrogen element or 1000 moles of hydrogen have atoms (or 1000 times the Avogadro’s number).

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## Is H2 toxic?

Hydrogen has no other known toxic activity. … However, hydrogen concentrations needed to induce hypoxia even in a low-oxygen environment would far exceed the explosive limit of the gas. Thus, occupational exposure standards are set on the basis of the explosivity of hydrogen rather than its toxicity.