Question

formula 10 points
complete the following conversion. you should show the work on your own paper to be certain you have the correct choice of the two conversion factors. round your answer to the hundredths place.
how many moles is 287.98 grams of potassium (k)?
answer

Explanation:

Step1: Recall molar mass of K

Molar mass of K (potassium) is approximately 39.10 g/mol. The formula to convert grams to moles is $n = \frac{m}{M}$, where $n$ is moles, $m$ is mass in grams, and $M$ is molar mass.

Step2: Plug in values

Given $m = 287.98$ g and $M = 39.10$ g/mol, we calculate $n=\frac{287.98}{39.10}$.

Step3: Perform division

$\frac{287.98}{39.10} \approx 7.3652$

Step4: Round to hundredths

Rounding 7.3652 to the hundredths place gives 7.37.

Answer:

7.37