Question

how many moles o are in 1.246 g o?
? mol o
do not round! include lots of digits in your answer since this is part of a larger calculation.

Explanation:

Step1: Recall molar mass of O

The molar mass of oxygen (O) is approximately 16.00 g/mol (from the periodic table, the atomic mass of O is about 16.00 g/mol, so 1 mole of O atoms has a mass of 16.00 g).

Step2: Use the formula for moles

The formula to calculate moles ($n$) is $n=\frac{m}{M}$, where $m$ is the mass (in grams) and $M$ is the molar mass (in g/mol). Here, $m = 1.246$ g and $M = 16.00$ g/mol. So we substitute the values into the formula: $n=\frac{1.246}{16.00}$.

Step3: Perform the division

Calculating $\frac{1.246}{16.00}=0.077875$.

Answer:

0.077875