The mass in grams of 2 mol of H2SO4 is:
A) 98g/2
B) 2(98g)
C) 196g/2
D) 2(196g)

The correct answer is B) 2 x (98g)

Explanation:

We calculate the weight of 1 mol of H2S04, from the atomic weights of each element obtained from the periodic table.

Weight 1 mol H2S04= (Weight H)x2 + Weight S + (Weight 0) x4

Weight 1 mol H2S04= 1 g x 2 + 32g + 16 g x 4= 98 g/mol

1 mol98 g H2S04

2 molx= (2 mol x98 g H2S04)/1 mol= 196g

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.