9. How many moles of H2SO4 are there in 98 g of H2so4

Hey there!:

molar mass H₂SO₄ => 98.079 g/mol

Therefore :

number of moles  = mass of solute / molar mass

number of moles = 98 / 98.079

number of moles = 0.0009991 moles

Hops this helps!

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72