It's momentum and it's important to understand bc it explains why things do not stop moving after the energy that is being used to make that movement has stopped
Answer:
37.5g
Explanation:
The half-life is the time taken for a radioactive substance to decay to half its original composition;
Original composition here is = 4800g of U-238
How many grams remain after 7 half-lives;
After each life, the uranium reduces by half;
Amount remaining = 4800 x 
= 37.5g
After 7 half lives, 37.5g of the original sample will remain.
Answer:
Van't Hoff factor is 1.72 ≅ 2
Explanation:
Let's apply the colligative property of boiling point elevation:
ΔT = Kb . m . i
ΔT = Boiling T° of solution - T° boiling of pure solvent
103.45 °C - 100°C = 0.512 °C/m . 3.90 m . i
3.45 °C / 0.512 m/°C . 3.90 m = i
1.72 = i ≅ 2
The answer to the question asked above is heat energy<span> .
</span><span>The energy powering the movements of molecules is referred to as the heat energy of the system.</span>
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.
