You have 3 (h2(so4)) on the reactants side so you need to have 6 total hydrogen’s on the products side. Therefore 3(h2) is required.
I don't know what the problem is, but here are some rues to help you out:
- All non-zero figures are significant
- When a zero falls between non-zero digits, that zero is significant.
- When a zero falls after a decimal point, that zero is significant.
- When multiplying and dividing significant figures, the answer is limited to the number of sig figs equal to the least number of sig figs in the problem.
- When adding and subtracting, the answer is limited to the number of decimal places in the number with the least number of decimal places.
Internuclear distance can be defined as the distance between the nuclei atoms, i.e.,the distance between the center of nucleus to the outer most shell of an atom.
The answer is A. Has a low pH in solution.
Mass number (A) =protons (p+) + neutrons(n°)
