Question

Масса H2SO4 =490г сколько в этой массе вещества атомов кислорода?

Answer 1

1.2 умножить на 10 в 25 степени

Answer 2

To find the number of oxygen atoms in a given mass of H2SO4 (sulfuric acid), we need to perform the following steps:

1. Determine the molar mass of H2SO4.
2. Calculate the number of moles of H2SO4 using its molar mass and the given mass.
3. Use the chemical formula of H2SO4 to find the ratio of oxygen atoms to H2SO4 molecules.
4. Finally, calculate the number of oxygen atoms.

Step 1: Molar Mass of H2SO4 The molar mass of H2SO4 can be calculated as the sum of the individual atomic masses of its constituent elements:

H (hydrogen) = 1.008 g/mol S (sulfur) = 32.06 g/mol O (oxygen) = 16.00 g/mol

Molar mass of H2SO4 = (2 * H) + S + (4 * O) Molar mass of H2SO4 = (2 * 1.008 g/mol) + 32.06 g/mol + (4 * 16.00 g/mol) Molar mass of H2SO4 = 2.016 g/mol + 32.06 g/mol + 64.00 g/mol Molar mass of H2SO4 = 98.076 g/mol

Step 2: Calculate Moles of H2SO4 Moles of H2SO4 = Mass of H2SO4 / Molar mass of H2SO4 Moles of H2SO4 = 490 g / 98.076 g/mol Moles of H2SO4 ≈ 4.99 moles

Step 3: Determine the Ratio of Oxygen Atoms to H2SO4 Molecules The chemical formula of sulfuric acid is H2SO4. In this formula, there are 4 oxygen atoms for each H2SO4 molecule.

Step 4: Calculate the Number of Oxygen Atoms Number of oxygen atoms = Moles of H2SO4 × Number of oxygen atoms per molecule Number of oxygen atoms = 4.99 moles × 4 oxygen atoms/molecule Number of oxygen atoms ≈ 19.96

So, in the given mass of 490 grams of H2SO4, there are approximately 19.96 moles of H2SO4 and around 19.96 * 4 = 79.84 atoms of oxygen.