Answer:
Explanation:
To convert from grams to moles we must use the molar mass. This can be found on the Periodic Table.
We can use this number as a ratio or fraction.
Multiply by the given number of grams: 4.5
Flip the fraction so the grams of sulfur cancel.
The original measurement of grams had 2 significant figures, so our answer must have the same. For the number we calculated, that is the hundredth place.
The 0 in the thousandth place tells us to leave the 4.
There is about <u>0.14 moles of sulfur</u> in 4.5 grams.
Answer:
Explanation: The strengths of the inter molecular forces varies as follows -
The normal boiling point of CSe2 is 125°C and that of CS2 is 116°C, which explains the trend that as we move down the group, the boiling point of e compound increases as the size increases.
This usually happens because larger and heavier atoms have a tendency to exhibit greater inter molecular strengths due to the increase in size . As the size increases, the valence shell electrons move far away from the nucleus, thus has a greater tendency to attract the temporary dipoles.
And larger the inter molecular forces, more tightly the electrons will be held to each other and thus more thermal energy would be required to break the bonds between them.