What is the total number of hydrogen atoms in 0.0850 mol of hydrated ammonium iron(II) sulfate, (NH4)2Fe(SO4)2⋅6H2O(\text{NH}_4)_2\text{Fe}(\text{SO}_4)_2 \cdot 6\text{H}_2\text{O}(NH4)2Fe(SO4)2⋅6H2O?
(Take Avogadro's constant, LLL, to be 6.02 × 1023 mol-1)
5.12×10225.12 \times 10^{22}5.12×1022
4.09×10234.09 \times 10^{23}4.09×1023
6.14×10236.14 \times 10^{23}6.14×1023
1.02×10241.02 \times 10^{24}1.02×1024
199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.