A chemist adds of a nickel(II) chloride solution to a reaction flask. Calculate the mass in grams of nickel(II) chloride the chemist has added to the flask. Round your answer to significant digits.

Jim's statement is correct for positive numbers

Explanation:
Flooring means that we will take the number before the decimal point. This number should be the whole number that precedes the given decimal.

Now, let's check:
1- positive numbers:
Take 3.5 for example:
Taking the number directly before the point > we would have 3
The whole number that directly precedes 3.5 is > 3
Since they are both the same, therefore, Jim's statement is true

2- negative numbers:
Take -3.5 for example:
Taking the number directly before the point > we would have -3
The whole number that directly precedes 3.5 is > -4
Since they are both not the same, therefore, Jim's statement is false

Hope this helps :)