Question

Сколько малекул в 1 кг H2?

Answer 1

Нужно массу водорода m=1*10^(-3) кг разделить на молярную массу водорода М=2*10^(-3) кг/моль и результат умножить на число Авогадро N=6,02*10^23 1/моль. Получим: 1*10^(-3):2*10^(-3)*6,02*10^23=
=3,01*10^21 молекул.

Answer 2

Calculating the Number of Molecules in 1 kg of H2

To calculate the number of molecules in 1 kg of H2, we can use the following steps:

1. Calculate the number of moles of H2 in 1 kg. 2. Use Avogadro's number to convert moles to molecules.

Step 1: Calculate the Number of Moles of H2 in 1 kg

The molar mass of H2 is 2 grams/mol. Therefore, 1 mole of H2 weighs 2 grams.

To find the number of moles in 1 kg (1000 grams) of H2, we can use the following calculation: ``` Number of moles = Mass (in grams) / Molar mass = 1000 grams / 2 grams/mol = 500 moles ``` Source:

Step 2: Convert Moles to Molecules Using Avogadro's Number

Avogadro's number is approximately 6.022 x 10^23 molecules/mol.

To find the number of molecules in 500 moles of H2, we can use the following calculation: ``` Number of molecules = Number of moles * Avogadro's number = 500 moles * 6.022 x 10^23 molecules/mol = 3.011 x 10^26 molecules ``` Source:

Therefore, there are approximately 3.011 x 10^26 molecules in 1 kg of H2.