Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new metal will lower companies' costs of buying and operating airplanes. what is the best step for the engineers to make next?

Perform pilot runnings in order to try out its performance in airplanes.

Explanation:

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Engineering provides powerful tools to implement new materials in several applications, nonetheless, before the application stages, a set of pilot runnings must be performed in order to test the efficiency, reliability and assurance of the aimed material. Tests such as hardness, mechanical and chemical resistance and others are used to establish the viability of the new material, in this case, the aforesaid new metal.

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n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.

1. they vary with a higher number because boiling is way hotter than melting