Na, Ba, Cs and Ni are metals.
It is false, because models don't help you get a better understanding of the world, they help you better understand what you are trying to get from it like a weather model, it helps us see the weather because it is a visual so people would know what type of weather is where.
Answer:
<h2>1.2 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula
From the question
mass = 30 g
volume= 25 mL
We have
We have the final answer as
<h3>1.2 g/mL</h3>
Hope this helps you