Question

CAN ANYONE HELP ME PLEASE THIS QUESTION IS FROM A PHET ACTIVITY CALLED REACTANTS,PRODUCTS, AND LEFTOVERS

Under the right conditions, sometimes atoms and molecules (reactants) will come together to form new
molecules (products)? When this happens, is matter being created? Make a claim and use evidence from this
activity to support your answer.

Answer 1

Matter is NOT being created

Step-by-step explanation:

There's a fundamental law of conservation of mass and energy which states we CANNOT create new mass or energy, we can just rearrange stuff.

I went to your PHET lab and one thing you could do to prove it is show that you react two h2 and two O2 in process of making water. You will see on the box on the right that you get two water molecules and a leftover H2. Now count up the number of atoms of each element on both sides.

In left side with reactants, you have 2 H2 (so a total of 4 hydrogen atoms), and 2 O2 (so a total of 4 oxygen)

In right side with product and leftover, you have two water molecule (each water molecules has two hydrogen and one oxygen so total you have 4 hydrogen and two oxygen since you ahve two water molecule). But you also have one O2 left over (that's two oxygen atoms)

Now see the magic, we started with 4 hydrogen atoms and 4 oxygen atoms

We ended with 4 hydrogen atoms and 4 oxygen atoms!!

NO MATTER was created, the atoms were just rearranged. Does that make sense?