How many molecules are in 240.0 grams of cobalt (ii) chloride, cocl2

Avagadros number states that 1 mol of any substance is made of 6.022 x 10^23 units

These units could be atoms making up elements or molecules making up compounds

Therefore 1 mol of CoCl2 is Made of 6.022 x 10^23 molecules of CoCl2

Molar mass of CoCl2 is 130 g/mol

Therefore 1 mol of CoCl2 weighs 130 g

So 130 g of CoCl2 contains 6.022 x 10^23 Molecules of CoCl2

Then 240 g of CoCl2 contains - 6.022 x 10^23 / 130 g x 240 g = 1.11 x 10^24 molecules of CoCl2

Answer is 1.11 x 10^24 molecules of CoCl2

The molecules that are in 240 grams of cobalt(ii) chloride COC2 is 1.112 x10^24 molecules

calculation

find the number of moles = mass/molar mass\

molar mass of CoCl2 = 58.9 + 35.5 x2 = 129.9 g/mol

moles= 240g/129.9 g/mol =1.8476 moles

by use of Avogadro's constant

that is 1 mole= 6.02 x10^23 molecules

1.8476 moles=? molecules

by cross multiplication

1.8476 moles x 6.02 x10^23 molecules/ 1moles =1.112 x10^24 molecules

well off of my head we know that the perfume bottle is most likely opened, or broken. i can also tell it is moving at low and high concentration because it is covering the other side of the room. what we can obtain from this information is it explains why the odor can be detected at the other side of the room.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.