How many particles would be in 8.4 moles of Octane (C8H18)?

There are 0.307 moles of molecules in 35 g of octane.

Explanation: You start by finding the molar mass of octane,(C8H18)This is 114 grams, because there are eight moles of carbon atoms and eighteen moles of hydrogen atoms in each mole of octane molecules.So, we total up 8 x 12 (for the carbon) and 18 x 1 (for the hydrogen).35g÷114 9g. That's it! This answer is the number of moles of octane molecules contained in the 35 grams of the compound.

mol

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.