Moles in a Cat

[GingerBread27]

I have to approximately figure out, to the nearest order of magnitude, how many moles of atoms there are in a 12 kg cat.You are also told that The masses of a hydrogen atom, an oxygen atom, and a carbon atom are 1.0 u, 16 u, and 12 u. .

all i know is that 1 u=1.66 x 10^-27 kg.
From here I am unsure where to go.

[thermodynamicaldude]

There are 6.022 * 10^23 atoms in 1 mole.
Molar mass of hydrogen is around 1 g/mole....carbon is around 12 g/mole...and oxygen is about 16 g/mole...

You have 12,000 grams...you can find the moles and then thus find the atoms. :-D

[ehild]

I have to approximately figure out, to the nearest order of magnitude, how many moles of atoms there are in a 12 kg cat.You are also told that The masses of a hydrogen atom, an oxygen atom, and a carbon atom are 1.0 u, 16 u, and 12 u. .

all i know is that 1 u=1.66 x 10^-27 kg.
From here I am unsure where to go.

But this is a huge cat! :smile:
I would say that it mainly consists of water....

ehild