Answer:
molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled.
Explanation:
Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.
The planet that orbits in a near circle is EARTH :D
C I think not sure give it a try
<u>Answer: </u>
of volume needs to be pipetted out in the test tube.
<u>Explanation:</u>
We are given:
Mass of BSA to be formed = 
(Conversion factor: 
Volume of stock solution = 
(Conversion factor: 
It is also given that for the mass of BSA is 0.5 g, the volume used up is 1 mL
In order to have, 0.005 g, the volume of stock solution needed will be = 
Hence, of volume needs to be pipetted out in the test tube.
Answer:
The element that has 16 electrons, 16 protons, and 16 neutrons is sulfur (S)
Explanation:
The atomic number tell you the number of protons.
The atomic configuration tell you the number of electrons.
The mass number minus the protons tell you the number of neutrons.
