Answer:
<h2>3 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula

From the question we have
volume = final volume of water - initial volume of water
volume = 45 - 30 = 15 ml
We have

We have the final answer as
<h3>3 g/mL</h3>
Hope this helps you
Answer:
10,000 milligrams
Explanation:
1 gram equals 1000 milligrams
Answer:
Tell students that sometimes when two (or more) substances are mixed together, a change occurs and another substance (or substances) is created. This is called a chemical reaction. Gas may form, heat may be produced, and color may change. These types of changes indicate that a chemical reaction has occurred.