The number of hydrogen atoms in 0.050 mol of c3h8o3 is

            2.40 × 10²³ Atoms of Hydrogen

Solution:

The number of hydrogen atoms in C₃H₈O₃ are calculated as;

As, there are eight hydrogen atoms per molecule of C₃H₈O₃, therefore the number of hydrogen atoms per mole of C₃H₈O₃ are calculated as;

            1 mole C₃H₈O₃ contains  =  6.022 × 10²³ Molecules of C₃H₈O₃

So,

       0.05 mole C₃H₈O₃ will contain  =  X Molecules of C₃H₈O₃

Solving for X,

                     X  =  (0.05 × 6.022 × 10²³) ÷ 1

                     X =  3.011 × 10²² Molecules of C₃H₈O₃

As,

            1 Molecule of C₃H₈O₃ contains  =  8 Atoms of Hydrogen

So,

3.011 × 10²² Molecules of C₃H₈O₃ will contain  =  X Atoms of Hydrogen

Solving for X,

                     X =  (3.011 × 10²² × 8) ÷ 1

                     X  =  2.40 × 10²³ Atoms of Hydrogen

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catya your not at all which answer i've seen you do this on another question!