Question

How many moles do 5.62 x 1023 formula units of sodium hydroxide constitute?

0.934 moles

1.07 moles

3.38 moles

3.38 x 1047 moles

Answer 1

`5.62* 10^(23)` formula units of sodium hydroxide constitutes 0.934 moles.

Step-by-step explanation:

Number of molecules of sodium hydroxide =
`N=5.62* 10^(23)` molecules

Moles of sodium hydroxide = n

`N=n* N_A`

`N_A=6.022* 10^(23) mol^(-1)`

`5.62* 10^(23)=n* 6.022* 10^(23) mol^(-1)`

n = 0.934 moles

So,
`5.62* 10^(23)` formula units of sodium hydroxide constitutes 0.934 moles.

Answer 2

Answer: -

0.934 moles constitute 5.62 x 1023 formula units of sodium hydroxide.

Explanation: -

6.02 x 10²³ NaOH formula units are present in 1 mole of sodium hydroxide according to Avogadro's Law.

5.62 x 10²³ NaOH formula units are present in
`( 1 mole x 5.62 x 1023)/(6.02 x 1023)`

= 0.934 moles of NaOH