In 1897 the swedish explorer andreé tried to reach the north pole in a balloon. the balloon was filled with hydrogen gas. the hydrogen gas was prepared from iron splints and diluted sulfuric acid. the reaction is
fe(s)+ h2so_4(aq) > feso4(aq) + h2(g)
the volume of the balloon was 4800 m^3, and the loss of hydrogen gas during filling was estimated at 20.%. what mass of iron splints and 98% (by mass) h2so4 were needed to ensure the complete filling of the balloon? assume a temperature of 0^c, a pressure of 1.0 atm during filling, and 100% yield

Explanation:

Hello,

Based on the given data, the corresponding moles of hydrogen to fill the balloon without loss is:

Now, considering the 20% loss of hydrogen, the amount that ensured the complete filling was:

Based on that result, we proceed to computed the amounts of both iron and 98% by mass sulfuric acid that were needed to ensure the complete filling of the balloon as follows:

Best regards.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.