Question

How may particles are there in:

in 1 mole of silicon?

in 2 moles of fluorine?

in 31g phosphorous?

in 18g water?

please help im confused especially with the last one and the second last one second

Answer 1

a mole is a number , like a dozen

dozen = 12 , mole = 6.02E23


6.02E23 ... atoms

2 * 6.02E23 ... atoms

molar mass is 31 g ... so, 6.02E23
... atoms

molar mass is 18 g ... so, 6.02E23
... molecules

Answer 2

I thought the last two were different I got

for 31g phosphorous:

5.149501661 X 10-23


for 18g water:


2.990033223 X 10-23

Scott I dont get what you meant by your last two answers

Answer 3

Please note that P is spelled posphorus

Answer 4

the atomic mass of P is 31
... this means that one mole of P has a mass of 31 g
... P is an element, so the "particles" are atoms

similarly with the water question
... water is a compound, so the "particles" are molecules

Answer 5

I see I can't spell phosphorus either.