Given:
- 3 gram atoms of sulphur

To Find:
- The weight of 3 gram atoms of sulphur

Solution:
The weight of an atom is given by its atomic mass. The atomic mass of an element is the average mass of all the isotopes of that element, taking into account the abundance of each isotope.

Step 1: Find the atomic mass of sulphur
The atomic mass of sulphur is given as 32.06 amu (atomic mass units).

Step 2: Convert the atomic mass to grams
To convert from atomic mass units to grams, we use the conversion factor 1 amu = 1.66054 x 10^-24 grams.

1 amu = 1.66054 x 10^-24 grams

Therefore, 32.06 amu = 32.06 x (1.66054 x 10^-24) grams

Step 3: Calculate the weight of 1 gram atom of sulphur
The weight of 1 gram atom of sulphur is equal to the atomic mass of sulphur in grams.

Weight of 1 gram atom of sulphur = 32.06 x (1.66054 x 10^-24) grams

Step 4: Calculate the weight of 3 gram atoms of sulphur
To find the weight of 3 gram atoms of sulphur, we multiply the weight of 1 gram atom of sulphur by 3.

Weight of 3 gram atoms of sulphur = 3 x (32.06 x (1.66054 x 10^-24)) grams

Step 5: Simplify the expression
Weight of 3 gram atoms of sulphur = 3 x 32.06 x (1.66054 x 10^-24) grams

Step 6: Calculate the value
Weight of 3 gram atoms of sulphur = 99 grams

Answer:
The weight of 3 gram atoms of sulphur is 99 grams.

1 mole has 32 g sulphur
so 3 mole=32×3=96