Calculate the number of molecules in 7.00 moles h2s.

calculate the number of moles of cl atoms in 1.81 x10^24 units of magnesium chloride, mgcl2.

Answer : (1) The number of molecules will be,

(2) The number of moles of chlorine atoms is, 6.0112 moles

Solution :

(1) As, 1 mole contains number of molecules

So, 7 moles contains number of molecules

Therefore, the number of molecules will be,

(2) Number of atoms of magnesium chloride =

In one magnesium chloride molecule there are two chlorine atoms.

Number of chlorine atoms in atoms of magnesium chloride =

1 mole = atoms

Moles of chlorine =

Therefore, the number of moles of chlorine atoms is, 6.0112 moles

petroleum? coal maybe?

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."