Answer:
1. 4
2. 2
3. 3
4. 1
Explanation: just did it on edge 2021
O2- stands for superoxide anion, S2- stands for sulfide anion, H- stands for hydrogen anion, and Na+ stands for sodium this all ions possess the electron configuration of noble gas because each of them (O2-, S2-, H-, and Na+) has a full outer shell.
Answer:
<h2>0.93 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula

From the question
mass = 37.2 g
volume = 40 mL
We have

We have the final answer as
<h3>0.93 g/mL</h3>
Hope this helps you
Number 1 is Comets and asteroids
Number 2 is Comets are made of ice and rock
Number 3 is Meteor