Question

Сколько молекул H2Sсодержится В102 Г

Answer 1

N=n*Na
n=m/M
M(H2S)=34гг/моль
n(H2S)=102/34=3моль
N(H2S)=3*6*10^23=18*10^23молекул

Answer 2

Calculating the Number of H2S Molecules in 102g

To calculate the number of molecules of H2S in 102g, we can use the concept of moles and Avogadro's number. First, we need to find the molar mass of H2S, and then we can proceed with the calculation.

Step 1: Find the Molar Mass of H2S The molar mass of H2S (hydrogen sulfide) can be calculated by adding the atomic masses of its constituent atoms.

The molar mass of H2S is: 2(atomic mass of hydrogen) + 1(atomic mass of sulfur)

From source we can see that the atomic mass of hydrogen is approximately 1.00.

From source we can see that the atomic mass of sulfur is approximately 32.1.

Therefore, the molar mass of H2S is approximately 2(1.00) + 32.1 = 34.1 g/mol.

Step 2: Calculate the Number of Moles in 102g of H2S Using the molar mass of H2S, we can calculate the number of moles in 102g.

Number of moles = Mass / Molar mass Number of moles = 102g / 34.1 g/mol Number of moles ≈ 2.988 moles

Step 3: Calculate the Number of Molecules Finally, we can use Avogadro's number to calculate the number of molecules in the calculated moles.

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

Number of molecules = Number of moles * Avogadro's number Number of molecules ≈ 2.988 * 6.022 x 10^23 Number of molecules ≈ 1.8 x 10^24 molecules

Therefore, there are approximately 1.8 x 10^24 molecules of H2S in 102g.

This calculation is based on the molar mass of H2S and Avogadro's number, and the sources provided support the atomic masses used in the calculation.