Question

Рассчитать в каком веществе больше водорода в ацетилене C2H2 или воде H2O

Answer 1

Mr(C2H2)=26

Mr(h2o)=18

Mr(h2)=2

W(H2)в ацетилене=2/26*100%=7,69%

W(H2)в воде=2/18*100%=11%

Ответ: массовая доля водорода в воде больше в 1,4 раза.

Answer 2

массова доля водорода в С2Н2 = 2/30=0,067 (6,7%)

в Н2О = 2/18=,0112 (11,2%) т.е больше в воде. 

или надо что-то другое?

Answer 3

Calculation of Hydrogen Content in Acetylene (C2H2) and Water (H2O)

To determine which substance contains more hydrogen, we need to compare the molar ratios of hydrogen in acetylene (C2H2) and water (H2O).

The molecular formula of acetylene is C2H2, which means that each molecule of acetylene contains 2 carbon atoms and 2 hydrogen atoms.

The molecular formula of water is H2O, which means that each molecule of water contains 2 hydrogen atoms and 1 oxygen atom.

To calculate the hydrogen content, we need to compare the number of moles of hydrogen in each substance.

The molar mass of hydrogen (H) is approximately 1 g/mol, and the molar mass of carbon (C) is approximately 12 g/mol. The molar mass of oxygen (O) is approximately 16 g/mol.

Let's calculate the number of moles of hydrogen in acetylene (C2H2) and water (H2O):

1. Acetylene (C2H2): - Number of moles of hydrogen = 2 moles (since each molecule of acetylene contains 2 hydrogen atoms)

2. Water (H2O): - Number of moles of hydrogen = 2 moles (since each molecule of water contains 2 hydrogen atoms)

Therefore, both acetylene (C2H2) and water (H2O) contain the same number of moles of hydrogen, which is 2 moles.

In conclusion, both acetylene (C2H2) and water (H2O) contain the same amount of hydrogen.

Please note that the calculation above is based on the molar ratios of hydrogen in each substance and does not take into account the mass or volume of the substances.