Question

Science is Hayley's favorite class! She especially loves doing experiments. Today, she began

an experiment with 260 grams of an unknown solid. During the experiment, the change in
the mass of the solid was -84 grams.
What is the final mass of the solid?

Answer 1

Answer: the final mass of the solid is 176 grams.

Explanation:

The "change" between two quantities, one initial Qi and one final Qf is defined as:

Change = Qf - Qi.

In this case, the quantity is mass, and we know that the initial mass is 260 grams.

And we also know that the change is -84 grams.

Then we have the equation:

Qf - 260 g = -84g

Qf = -84g + 260g = 176g

So the final mass of the solid is 176 grams.