Question

If a mole of sodium chloride weighs approximately 58 grams, and you have 29 grams of sodium chloride, how many moles of sodium chloride do you have?
A.0.5 moles
B.1 mole
C.2 moles
D.0.75 moles

Answer 1

The answer is A.0.5 moles 

a mole of sodium chloride weighs approximately 58 grams: 1 M - 58 g
you have 29 grams of sodium chloride, how many moles of sodium chloride do you have: xM - 29g

1 M : 58g = x : 29 g
x = 1 M : 58g * 29 g = 0.5 M