Calculate the number of moles in 1.98 grams of sodium bicarbonate show all work!!!!!

I don't have a calculator or a periodic table but I'll tell you how to do it.

First find the Mr of the sodium bicarbonate (The mass of the whole compound) using your periodic table. I think it is 84 (of the top of my head, so you better check)
Then divide the mass (1.98 grams) by the Mr (84)

1.98
------
84

Whatever the answer is, thats the number of moles.

Extra note.
You can also find moles by multiplying the concentration by the volume and dividing by 1000.

cv
------
1000

but you will probably learn that one later.

Moles= Mass/ Molecular Mass
First find the Molecular Mass of Sodium bicarbonate:
Formula: NaHCO3
Na= 23
H= 1
C= 12
O= 16
Molecular mass= 23+1+12+16*3 (* means multiplication)
=84
Moles=1.98/ 84
=0.024