What is the weight of a 90kg man standing on earth, where gᵉᵃʳᵗʰ = 9.82 m/s^2?

Explanation:

Mass and weight are quite different terms .

Weight is defined as the amount of force exerted on the earth due to our mass and gravity of acceleration.

Given that the mass is 90 kg and gravity of acceleration of earth is 9.82 m/s^2.

So weight will be

So this is the weight of the 90kg man standing on earth.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

if you mean hydrogen and oxygen then water is the product