Question

Сравнить количество молекул, которые содержатся в 1 г аммиака и в 1 г азота. В каком случае и во сколько раз их больше?

Answer 1

В аммиаке: 
n = 1/17 = 0.05 моль
N = 0.05 * 6.05*10^23 = 3.5*10^22 молекул
В азоте: 
n = 1/28 = 0.035 моль
N = 0.035*6.02 *10^23 = 2.15*10^22 молекул.
В аммиаке молекул больше в 1.6 раза

Answer 2

Comparing the Number of Molecules in 1g of Ammonia and 1g of Nitrogen

To compare the number of molecules in 1g of ammonia and 1g of nitrogen, we need to consider the molar mass of each substance and then use Avogadro's number to calculate the number of molecules.

Molar Mass of Ammonia (NH3): The molar mass of ammonia (NH3) is approximately 17.031 g/mol.

Molar Mass of Nitrogen (N2): The molar mass of nitrogen (N2) is approximately 28.02 g/mol.

Using Avogadro's number, which is approximately 6.022 x 10^23, we can calculate the number of molecules in 1g of each substance.

Calculations:

Number of Molecules in 1g of Ammonia: 1. Calculate the number of moles in 1g of ammonia: - Number of moles = Mass (g) / Molar mass (g/mol) = 1g / 17.031 g/mol - Number of moles ≈ 0.0586 moles 2. Calculate the number of molecules: - Number of molecules = Number of moles * Avogadro's number - Number of molecules ≈ 0.0586 moles * 6.022 x 10^23 ≈ 3.53 x 10^22 molecules

Number of Molecules in 1g of Nitrogen: 1. Calculate the number of moles in 1g of nitrogen: - Number of moles = Mass (g) / Molar mass (g/mol) = 1g / 28.02 g/mol - Number of moles ≈ 0.0357 moles 2. Calculate the number of molecules: - Number of molecules = Number of moles * Avogadro's number - Number of molecules ≈ 0.0357 moles * 6.022 x 10^23 ≈ 2.15 x 10^22 molecules

Comparison:

In which case and by how many times are they more? - The number of molecules in 1g of ammonia is approximately 1.64 times more than the number of molecules in 1g of nitrogen.

This comparison is based on the molar masses and Avogadro's number, which provide a quantitative understanding of the number of molecules in a given mass of each substance.