Question

How many grams are there in 4.30 x 10²⁶ molecules of H₂SO₄?

Answer 1

Mass of H₂SO₄ : 69,972 g

Further explanation  

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

moles of H₂SO₄ :

$\tt mol=\dfrac{N}{No}\\\\mol=\dfrac{4.3\times 10^{26}}{6.02\times 10^{23}}\\\\mol=7.14\times 10^2$

mass H₂SO₄ (MW=98 g/mol) :

$\tt mass=mol\times MW\\\\mass=7.14.10^2\times 98\\\\mass=69,972~g$