Question

part 2/2 moles, grams, molecules
how many grams of na are in 5.42 x10^24 molecules na? input the numeric value.
avogadros number: 6.022 x10^23 molecules or atoms = 1mole

Explanation:

Step1: Calculate moles of Na

Use the formula $n=\frac{N}{N_A}$, where $n$ is the number of moles, $N$ is the number of molecules, and $N_A$ is Avogadro's number.
$n=\frac{5.42\times 10^{24}}{6.022\times 10^{23}}$
$n = 9$ moles

Step2: Calculate mass of Na

The molar - mass of Na is approximately 23 g/mol. Use the formula $m = n\times M$, where $m$ is the mass, $n$ is the number of moles, and $M$ is the molar - mass.
$m=9\times23$
$m = 207$ g

Answer:

207