10. NASA has built crafts that allow longer stays in space, survive under different pressures and weather conditions, and conduct many investigations. One of the
most helpful vehicles the U. S. has used is the space rover. It contained several
improvements over earlier technology. The space rover differed from previous
space v Snicles because it - *
was cheap to build and easy to program
O could carry more than one person
O could travel only to the Moon and back to Earth
O was used to collect, analyze, and send data from planets outside of Earth

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.

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