Question
If I have 40mg of potassium, that would be how many moles of potassium?
mols= grams/atomic number
0.04g/39.0983= .001023062
would equal 1.02 x 10^-3 correct?
Did I do this problem correctly?
mols= grams/atomic number
0.04g/39.0983= .001023062
would equal 1.02 x 10^-3 correct?
Did I do this problem correctly?
Answers
Yes it is done correctly but if you have 40 mg that is only two sig figures (and then only if it is written as 40.); therefore, you would be allowed only two in the final answer. You have 3 s.f. in 1.02E-3.
Related Questions
Which one of the following will have the greatest number of moles of potassium ion: 10.0 mL of .10 M...
If my original sample contained 7.1 grams of potassium chlorate. How many moles of oxygen gas would...
Find the mass of water (H2O) needed to react with 150 grams of potassium (K)
2K(s) + 2 H2O (g)-2KOH...