Question

which of the following molecules shows two atoms of hydrogen (h)? (1 point)
○ h₂so₄
○ ho₂
○ 2ch₄
○ 2h₂o

Explanation:

Step1: Analyze $H_2SO_4$

In $H_2SO_4$, the sub - script 2 next to $H$ indicates there are 2 hydrogen atoms in one molecule of sulfuric acid.

Step2: Analyze $HO_2$

In $HO_2$, there is 1 hydrogen atom in one molecule.

Step3: Analyze $2CH_4$

In $CH_4$, there are 4 hydrogen atoms in one molecule. But the coefficient 2 in front just means 2 molecules of $CH_4$, so the number of hydrogen atoms in 2 molecules is $2\times4 = 8$.

Step4: Analyze $2H_2O$

In $H_2O$, there are 2 hydrogen atoms in one molecule. The coefficient 2 in front means 2 molecules of water, so the total number of hydrogen atoms is $2\times2=4$.

Answer:

$H_2SO_4$