Ms. Dunbar is teaching her class about states of matter. She put two beakers on a lab table. The beakers were labeled beaker X and beaker Y. Each beaker contained the same liquid substance. She heated beaker X and she decreased the pressure in
beaker Y. The students in the class then observed the beakers. What are possible states of matter that could have been contained
in each beaker at the end of the demonstration?
OA.
Both beakers could have contained gases.
OB. Beaker X could have contained a gas, and beaker Y could have contained a solid.
OC. Both beakers could have contained solids.
OD.
Beaker X could have contained a solid, and beaker Y could have contained a gas.

ill try to . no promises tho.

explanation:

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2