Round the number 31.257592 to 5 significant figures.

Explanation:

Highlight the first 5 digits. You should highlight 3, 1, 2, 5, and 7 in that order.

Note the next digit after that is a 5, meaning we'll round that 7 up to 8

So 31.257592 becomes 31.258 when we round to five significant figures.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.