Answer:
6. protons, mass number from the atomic number
7. Li= ,
Answer:

Explanation:
Hello,
In this case, since the density is defined as the ratio between the mass and the volume as shown below:

We can compute the density of water for the given 43 g that occupy the volume of 43 mL:

Regards.
Answer:
for what I can see in the picture the volume is 155
Explanation:
Psolution = X · PH_20
= 0.966 · 31.8 torr
= 30.7 torr
Answer:
I think that gravity can be considered a force.
Explanation:
As the object falls, it moves faster and faster. Gravity is considered a universal force because it acts between any two masses anywhere in the universe. For example, there is a gravitational pull between the Sun and the Moon. Even small masses attract one another.
Hope this helped! :)