Question

In an experiment it is found that 2.0769 gm of pure x produces 3.679 gm of pure x2o5. the number of moles of x is

Answer 1

the number of moles of x =?
mass = 2.0769gm
x produced = 3.679 gm
the answer is m×9.13/234=answer

Answer 2

Answer:

the chemical equation is ..

2X + 5/2 O2 → X205

so the mass of Oxygen using the law of conservation of mass = 3.6769 - 2.0769

so the mass oxygen is = 1.6 g

no. of mole of Oxygen = given mass / molar mass

so the no. of moles for oxygen. is 1.6/32 = 0.05 moles

as 5/2 moles of O2 reacts with 2 moles of X

then ,

5/2 moles of O2 → 2 moles of X

and 0.05 moles of O2 reacts with → 4 × 0.05 /5 moles of X ...

so the no. of moles are 0.04

Explanation: