Calculate the mass
fraction of all elements in
sodium sulfate (Na2S04).ASAP

Mass fraction of Na = 0.3239

Mass fraction of S = 0.2254

Mass fraction of O = 0.4507

Explanation:

We are given the element as (Na2S04).

Atomic mass of Na = 23

Atomic mass of S = 32

Atomic mass of O = 16

Thus;

Molar mass of (Na2S04) = (23 × 2) + 32 + (16 × 4) = 142

Mass fraction of Na = (23 × 2)/142 = 0.3239

Mass fraction of S = 32/142 = 0.2254

Mass fraction of O = (16 × 4)/142 = 0.4507

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

i think that the answer is c