There are 4.288 x 10^24 particles of sand in a bucket you have from the beach. How many moles of sand do you
have?

7.12 moles of sand you have in the bucket

Explanation:

Moles are defined as a determined amount of particles. To relate moles with particles it is used Avogadro's number (6.022x10²³ particles / mole).

That means in 1 mole of a determined particle you will have 6.022x10²³ particles.

As in the bucket there are 4.288x10²⁴ particles:

4.288x10²⁴ particles * (1mole / 6.022x10²³ particles) =

2b2t

explanation:

2b2t

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.