50.0 mL of 6.0 M hydrochloric acid has been added to 250.0 mL of water.
What is the new concentration?
M1V1=M2V2
3.8 M
1.2 M
0.87 M
2.5 M

List the following gasses

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom