Answer:
See full explanation below for answers
Explanation:
First, you need to use the Avogadro's number which is:
6.02x10^23
This number means that 1 mole of any atom or molecule has 6.02x10^23 atoms or molecules. So to get the moles of any atom, just do the conversion as it's followed and depending of what is asking.
Now that we know this, let's do the conversion:
a) moles of Mg:
if 1 mole ------->6.02x10^23 atoms
then X mole ---------->2.95x10^22 atoms
Solving for X:
X = 2.95x10^22 / 6.02x10^23 = 0.049 moles of Mg
b) In the case of Zn
1 mole ---------> 6.02x10^23 atoms
0.75 mole -----------> X
Solving for X:
X = 0.75 * 6.02x10^23 = 4.52x10^23 atoms of Zn
c) moles of P
1 mole ----------> 6.02x10^23 atoms
X mole ---------> 1.3x10^25 atoms
X = 1.3x10^25 / 6.02x10^23 = 21.59 moles of P
d) molecules of CO:
1 mole -----------> 6.02x10^23 molecules
4 moles -----------> X molecules
X = 4 * 6.02x10^23 = 2.41x10^24 molecules of CO
