Answer / indra kant jha

1 MOLE=ATOMIC WEIGHT OF HYDROGEN (H2)=1*2=2GMS.
SINCE 2gms of hydrogen produced heat of 290kj
hence 1gms of hydrogen produced heat of 290/2 kj
hence 4gms of hydrogen will produce heat of 290/2*4=580kj.

Answer / guest

(c) 580 kJ

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