Question 3(multiple choice worth 2 points) when 3.5 mol al react with 12.5 mol hcl, what is the limiting reactant and how many moles of h2 can be formed? 2al + 6hcl yields 2alcl3 + 3h2 al is the limiting reactant, and 3.5 mol h2 can be formed hcl is the limiting reactant, and 3.2 mol h2 can be formed al is the limiting reactant, and 5.3 mol h2 can be formed hcl is the limiting reactant, and 6.3 mol h2 can be formed

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Name the element in group 17, period 2. (periodic table)