How many moles of hydrogen gas are produced when 0.4mol sodium react with excess water? 2Na+2H20—>2NaOH+H2

Which of the following compounds would be expected to have the strongest ionic bonds? a)the compound that has b)the largest ions with the greatest charge c)the compound that has d)the largest ions with the least charge the compound that has the smallest ions with the greatest charge the compound that has the smallest ions with the least charge