How many moles of sulfur atoms are present in 2.00 moles of cs2 ?

4 mol

C + 2S = CS2

1 mol of CS2 contains 2 mol of sulfur

So 2 mol of cs2 contains 2*2 mol of S

2mol CS2 x 2 mol S/ 1 mol CS2 =

4 mol S

There are 4 moles of sulfur atoms present in 2.00 moles of carbon sulfide.

Explanation:

In 1 mole of carbon sulfide there are 1 mole of carbon atoms and 2 moles of sulfur atoms.

Then moles of carbon  in 2 moles of carbon sulfide ;

of carbon atom

Then moles of sulfur in 2 moles of carbon sulfide ;

of sulfur atom

There are 4 moles of sulfur atoms present in 2.00 moles of carbon sulfide.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.