Nguyên tử X có tổng số hạt proton, notron, electron là 36.trong đó số hạt mang điện gấp 2 lần số hạt không mang điện . Xác định số hạt mỗi loại và nguyên tử khối của X. Xác định nguyên tố X

where's the diagram?

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 !

the answer would be a

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.