Question

Сколько молекул содержится в 0,5 кг водорода? какой объём занимают 50 моль воды?

Answer 1

N=m/M N=Na/n n=1000/1=1000 моль N=602*10 в 23 степени * 1000=6020*10 в 23 степени = 602* 10 в 24 степени

Answer 2

Number of Molecules in 0.5 kg of Hydrogen

To determine the number of molecules in 0.5 kg of hydrogen, we need to use Avogadro's number, which states that there are approximately 6.022 x 10^23 molecules in one mole of a substance.

First, we need to calculate the number of moles of hydrogen in 0.5 kg. To do this, we can use the molar mass of hydrogen, which is approximately 1 g/mol

The molar mass of hydrogen is 1 g/mol, which means that 1 mole of hydrogen weighs 1 gram. Therefore, 0.5 kg of hydrogen is equal to 500 grams.

To calculate the number of moles, we can use the formula:

Number of moles = Mass / Molar mass

Substituting the values:

Number of moles = 500 g / 1 g/mol = 500 mol

Now, we can use Avogadro's number to calculate the number of molecules:

Number of molecules = Number of moles x Avogadro's number

Substituting the values:

Number of molecules = 500 mol x 6.022 x 10^23 molecules/mol

Therefore, there are approximately 3.011 x 10^26 molecules in 0.5 kg of hydrogen.

Volume Occupied by 50 moles of Water

To calculate the volume occupied by 50 moles of water, we need to use the molar volume of water, which is approximately 18 cm^3/mol.

The molar volume of water is 18 cm^3/mol, which means that 1 mole of water occupies 18 cm^3 of volume.

To calculate the volume occupied by 50 moles of water, we can use the formula:

Volume = Number of moles x Molar volume

Substituting the values:

Volume = 50 mol x 18 cm^3/mol

Therefore, 50 moles of water occupy approximately 900 cm^3 of volume.