How many moles of carbon are in 5.2 moles of c7h18?

Answer : The number of moles of carbon are, 36.4 moles.

Explanation : Given,

Moles of = 5.2 mole

First we have to determine number of carbon and hydrogen atoms present in .

As we know that, in there are 7 atoms of carbon and 18 atoms of hydrogen.

Now we have to determine the moles of carbon.

As, 1 mole of contains 7 moles of carbon.

So, 5.2 moles of contains moles of carbon.

Hence, the number of moles of carbon are, 36.4 moles.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.