Question

How many moles of methane(CH4)are in 7.31x1025 molecules?Let's begin by setting up our equation.What belongs in the green box?7.31x1025 molecules CHA?A. 1 mole CH4B. 6.02 x 1023 molecules CHAEnter

Answer 1

Answer

B. 6.02 x 10²³ molecules CH₄

Explanation

Avogardro's constant says 1 mole of a substance has 6.02 x 10²³ molecules.

⇒ 1 mole = 6.02 x 10²³ molecules/atoms

Therefore, the mole of methane in the given molecules can be calculatedas follows

$Mole\text{ of methane }=\frac{7.31\times10^{25}_{}}{6.02\times10^{23}\text{ }molecules\text{ }CH_4}=121.43\text{ mole}$

Hence, what belongs to the green box is 6.02 x 10²³ molecules CH₄