Question

В каком из веществ H2SO3 или H2O массовая доля водорода больше?Ответ обоснуйте расчётами... Срочно нужно пожалуйста

Answer 1

W1-массовая доля H в H2SO3
w2-массовая доля H в H2O

w1(H)=2÷82×100%~2.44%
w2(H)=2÷18×100%~11.1%

w1<w2

Answer 2

Mass Fraction of Hydrogen in H2SO3 and H2O

To determine which substance, H2SO3 or H2O, has a higher mass fraction of hydrogen, we need to compare the molar masses and the number of hydrogen atoms in each compound.

The molar mass of H2SO3 can be calculated as follows: - The molar mass of hydrogen (H) is approximately 1 g/mol. - The molar mass of sulfur (S) is approximately 32 g/mol. - The molar mass of oxygen (O) is approximately 16 g/mol.

Therefore, the molar mass of H2SO3 is: 2 * (1 g/mol for hydrogen) + 32 g/mol for sulfur + 3 * (16 g/mol for oxygen) = 98 g/mol.

The molar mass of H2O can be calculated as follows: 2 * (1 g/mol for hydrogen) + 16 g/mol for oxygen = 18 g/mol.

Now, let's calculate the mass fraction of hydrogen in each compound.

For H2SO3: - The mass of hydrogen in H2SO3 is 2 g (2 moles of hydrogen * 1 g/mol). - The total mass of H2SO3 is 98 g/mol.

Therefore, the mass fraction of hydrogen in H2SO3 is: (2 g / 98 g) * 100% = 2.04%.

For H2O: - The mass of hydrogen in H2O is 2 g (2 moles of hydrogen * 1 g/mol). - The total mass of H2O is 18 g/mol.

Therefore, the mass fraction of hydrogen in H2O is: (2 g / 18 g) * 100% = 11.11%.

Based on the calculations, the mass fraction of hydrogen in H2O is higher than in H2SO3.