Question

find the number of hydrogen in 10 grams of hydrogen molecules​

Answer 1

Answer:

as 10 grams hydrogen molecules have 5 moles of hydrogen molecule then in 10 grams of hydrogen molecules it would be 3.011×$10^{24}$

Explanation:

As we know that one hydrogen atom( $H_{2}$) has an atomic mass of 1.

Now

      10 grams of hydrogen would have moles

                                           =  10 ÷ 2

                                           = 5 moles

           now 1 mole is equal = 6.0221409×$10^{23}$

              ( here 6.0221409×$10^{23}$ is called avogadro numbers )

∴ avogado numbers are the number of units in one mole of any substance that defined as its molecular weight in grams.

                   then 5 moles = 5 × avogadro numbers

                                          =5×6.0221409×$10^{23}$

                                          = 3.0110704×$10^{23}$

Answer 2

Answer:

The number of hydrogen atoms in ten grams of hydrogen molecules are 6.022×10²⁴

Explanation:

The mass of hydrogen given = 10 gram

The atomic mass of hydrogen is one and the molecular mass is 2. Here we have 10 grams of hydrogen molecules.

Number of moles of hydrogen present = $\frac{given mass}{molecular mass}$ = $\frac{10}{2}$ = 5 moles

The number of hydrogen atoms in one mole of H₂= 2×6.022×10²³

                                                                                   = 12.044×10²³

The number of hydrogen atoms in 5 moles of H₂ = 5×12.044×10²³

                                                                                   = 60.22×10²³

                                                                                   = 6.022×10²⁴

Therefore the number of hydrogen atoms in ten grams of hydrogen molecules are 6.022×10²⁴