Mike D. answered • 05/02/21

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(1) from the equation you need 2 moles of H_{2} per mole of methane produced

so for 17 moles of methane you need 2 x 17 = 34 moles of H_{2}

Molecular mass of H_{2} = 2 x atomic mass of H = 2 x 1 = 2g from the table

So mass of H_{2} needed = 2 x 34 = 68g

(2) Find the moles of HNO_{3} (1.4 / molecular mass)

Divide by 2 to get the moles of water

Find the molecular mass of water

Multiply by the number of moles of water